358554
The back \(emf\) induced in a coil, when current changes from 1 ampere to zero in one milli-second, is \(4\,volts\), the self inductance of the coil is
1 1 henry
2 4 henry
3 \(10^{-3}\) henry
4 \(4 \times 10^{-3}\) henry
Explanation:
\(e = - L\frac{{di}}{{dt}}\) But \(e = 4\;V\) and \(\frac{{di}}{{dt}} = \frac{{0 - 1}}{{{{10}^{ - 3}}}} = - 1/{10^{ - 3}}\) \(\therefore \frac{{ - 1}}{{{{10}^{ - 3}}}}( - L) = 4 \Rightarrow L = 4 \times {10^{ - 3}}\) henry
PHXII06:ELECTROMAGNETIC INDUCTION
358555
Assertion : Self-inductance is called the inertia of electricity. Reason : Self-inductance is the phenomenon, according to which an opposing induced e.m.f. is produced in a coil as a result of change in current or magnetic flux linked in the coil.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
As inertia in mechanics a change in state of rest or motion self-inductance \((L)\) resists changes in electrical current within a circuit or coil. The reason is also correct, as it explains that self-inductance involves the production of an opposing electromotive force \((e m f)\) within a coil when there are changes in current \((I)\) or magnetic flux \((\phi) . V_{\text {induced }}=-\dfrac{d \phi}{d t}=-L \dfrac{d I}{d t}\). The negative sign is for Assertion to be true. So correct option is (1).
PHXII06:ELECTROMAGNETIC INDUCTION
358556
Assertion : Self induction arises when strength of current changes in same coil. Reason : In mutual induction, current changes in one coil effects the current in other coil also.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Self-induction is an inherent property of each coil . Assertion is correct. In mutual induction a change of current in one coil produces current change in other coil. So correct option is \((2)\).
PHXII06:ELECTROMAGNETIC INDUCTION
358557
The self inductance of a long solenoid cannot be increased by
1 Increasing the number of turns in it
2 Increasing its area of cross section
3 Changing the medium with greater permeability
4 Increasing the current through it
Explanation:
Self-inductance of a long solenoid does not depend upon the current flowing through it.
PHXII06:ELECTROMAGNETIC INDUCTION
358558
Statement A : When the current in a coil changes, it induces a back emf in the same coil. Statement B : Back Emf is a measure of the inertia of the coil against the change of current through it.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The back emf induced in the coil is the measure of the inertia of the coil against the change of current through it.
358554
The back \(emf\) induced in a coil, when current changes from 1 ampere to zero in one milli-second, is \(4\,volts\), the self inductance of the coil is
1 1 henry
2 4 henry
3 \(10^{-3}\) henry
4 \(4 \times 10^{-3}\) henry
Explanation:
\(e = - L\frac{{di}}{{dt}}\) But \(e = 4\;V\) and \(\frac{{di}}{{dt}} = \frac{{0 - 1}}{{{{10}^{ - 3}}}} = - 1/{10^{ - 3}}\) \(\therefore \frac{{ - 1}}{{{{10}^{ - 3}}}}( - L) = 4 \Rightarrow L = 4 \times {10^{ - 3}}\) henry
PHXII06:ELECTROMAGNETIC INDUCTION
358555
Assertion : Self-inductance is called the inertia of electricity. Reason : Self-inductance is the phenomenon, according to which an opposing induced e.m.f. is produced in a coil as a result of change in current or magnetic flux linked in the coil.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
As inertia in mechanics a change in state of rest or motion self-inductance \((L)\) resists changes in electrical current within a circuit or coil. The reason is also correct, as it explains that self-inductance involves the production of an opposing electromotive force \((e m f)\) within a coil when there are changes in current \((I)\) or magnetic flux \((\phi) . V_{\text {induced }}=-\dfrac{d \phi}{d t}=-L \dfrac{d I}{d t}\). The negative sign is for Assertion to be true. So correct option is (1).
PHXII06:ELECTROMAGNETIC INDUCTION
358556
Assertion : Self induction arises when strength of current changes in same coil. Reason : In mutual induction, current changes in one coil effects the current in other coil also.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Self-induction is an inherent property of each coil . Assertion is correct. In mutual induction a change of current in one coil produces current change in other coil. So correct option is \((2)\).
PHXII06:ELECTROMAGNETIC INDUCTION
358557
The self inductance of a long solenoid cannot be increased by
1 Increasing the number of turns in it
2 Increasing its area of cross section
3 Changing the medium with greater permeability
4 Increasing the current through it
Explanation:
Self-inductance of a long solenoid does not depend upon the current flowing through it.
PHXII06:ELECTROMAGNETIC INDUCTION
358558
Statement A : When the current in a coil changes, it induces a back emf in the same coil. Statement B : Back Emf is a measure of the inertia of the coil against the change of current through it.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The back emf induced in the coil is the measure of the inertia of the coil against the change of current through it.
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PHXII06:ELECTROMAGNETIC INDUCTION
358554
The back \(emf\) induced in a coil, when current changes from 1 ampere to zero in one milli-second, is \(4\,volts\), the self inductance of the coil is
1 1 henry
2 4 henry
3 \(10^{-3}\) henry
4 \(4 \times 10^{-3}\) henry
Explanation:
\(e = - L\frac{{di}}{{dt}}\) But \(e = 4\;V\) and \(\frac{{di}}{{dt}} = \frac{{0 - 1}}{{{{10}^{ - 3}}}} = - 1/{10^{ - 3}}\) \(\therefore \frac{{ - 1}}{{{{10}^{ - 3}}}}( - L) = 4 \Rightarrow L = 4 \times {10^{ - 3}}\) henry
PHXII06:ELECTROMAGNETIC INDUCTION
358555
Assertion : Self-inductance is called the inertia of electricity. Reason : Self-inductance is the phenomenon, according to which an opposing induced e.m.f. is produced in a coil as a result of change in current or magnetic flux linked in the coil.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
As inertia in mechanics a change in state of rest or motion self-inductance \((L)\) resists changes in electrical current within a circuit or coil. The reason is also correct, as it explains that self-inductance involves the production of an opposing electromotive force \((e m f)\) within a coil when there are changes in current \((I)\) or magnetic flux \((\phi) . V_{\text {induced }}=-\dfrac{d \phi}{d t}=-L \dfrac{d I}{d t}\). The negative sign is for Assertion to be true. So correct option is (1).
PHXII06:ELECTROMAGNETIC INDUCTION
358556
Assertion : Self induction arises when strength of current changes in same coil. Reason : In mutual induction, current changes in one coil effects the current in other coil also.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Self-induction is an inherent property of each coil . Assertion is correct. In mutual induction a change of current in one coil produces current change in other coil. So correct option is \((2)\).
PHXII06:ELECTROMAGNETIC INDUCTION
358557
The self inductance of a long solenoid cannot be increased by
1 Increasing the number of turns in it
2 Increasing its area of cross section
3 Changing the medium with greater permeability
4 Increasing the current through it
Explanation:
Self-inductance of a long solenoid does not depend upon the current flowing through it.
PHXII06:ELECTROMAGNETIC INDUCTION
358558
Statement A : When the current in a coil changes, it induces a back emf in the same coil. Statement B : Back Emf is a measure of the inertia of the coil against the change of current through it.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The back emf induced in the coil is the measure of the inertia of the coil against the change of current through it.
358554
The back \(emf\) induced in a coil, when current changes from 1 ampere to zero in one milli-second, is \(4\,volts\), the self inductance of the coil is
1 1 henry
2 4 henry
3 \(10^{-3}\) henry
4 \(4 \times 10^{-3}\) henry
Explanation:
\(e = - L\frac{{di}}{{dt}}\) But \(e = 4\;V\) and \(\frac{{di}}{{dt}} = \frac{{0 - 1}}{{{{10}^{ - 3}}}} = - 1/{10^{ - 3}}\) \(\therefore \frac{{ - 1}}{{{{10}^{ - 3}}}}( - L) = 4 \Rightarrow L = 4 \times {10^{ - 3}}\) henry
PHXII06:ELECTROMAGNETIC INDUCTION
358555
Assertion : Self-inductance is called the inertia of electricity. Reason : Self-inductance is the phenomenon, according to which an opposing induced e.m.f. is produced in a coil as a result of change in current or magnetic flux linked in the coil.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
As inertia in mechanics a change in state of rest or motion self-inductance \((L)\) resists changes in electrical current within a circuit or coil. The reason is also correct, as it explains that self-inductance involves the production of an opposing electromotive force \((e m f)\) within a coil when there are changes in current \((I)\) or magnetic flux \((\phi) . V_{\text {induced }}=-\dfrac{d \phi}{d t}=-L \dfrac{d I}{d t}\). The negative sign is for Assertion to be true. So correct option is (1).
PHXII06:ELECTROMAGNETIC INDUCTION
358556
Assertion : Self induction arises when strength of current changes in same coil. Reason : In mutual induction, current changes in one coil effects the current in other coil also.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Self-induction is an inherent property of each coil . Assertion is correct. In mutual induction a change of current in one coil produces current change in other coil. So correct option is \((2)\).
PHXII06:ELECTROMAGNETIC INDUCTION
358557
The self inductance of a long solenoid cannot be increased by
1 Increasing the number of turns in it
2 Increasing its area of cross section
3 Changing the medium with greater permeability
4 Increasing the current through it
Explanation:
Self-inductance of a long solenoid does not depend upon the current flowing through it.
PHXII06:ELECTROMAGNETIC INDUCTION
358558
Statement A : When the current in a coil changes, it induces a back emf in the same coil. Statement B : Back Emf is a measure of the inertia of the coil against the change of current through it.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The back emf induced in the coil is the measure of the inertia of the coil against the change of current through it.
358554
The back \(emf\) induced in a coil, when current changes from 1 ampere to zero in one milli-second, is \(4\,volts\), the self inductance of the coil is
1 1 henry
2 4 henry
3 \(10^{-3}\) henry
4 \(4 \times 10^{-3}\) henry
Explanation:
\(e = - L\frac{{di}}{{dt}}\) But \(e = 4\;V\) and \(\frac{{di}}{{dt}} = \frac{{0 - 1}}{{{{10}^{ - 3}}}} = - 1/{10^{ - 3}}\) \(\therefore \frac{{ - 1}}{{{{10}^{ - 3}}}}( - L) = 4 \Rightarrow L = 4 \times {10^{ - 3}}\) henry
PHXII06:ELECTROMAGNETIC INDUCTION
358555
Assertion : Self-inductance is called the inertia of electricity. Reason : Self-inductance is the phenomenon, according to which an opposing induced e.m.f. is produced in a coil as a result of change in current or magnetic flux linked in the coil.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
As inertia in mechanics a change in state of rest or motion self-inductance \((L)\) resists changes in electrical current within a circuit or coil. The reason is also correct, as it explains that self-inductance involves the production of an opposing electromotive force \((e m f)\) within a coil when there are changes in current \((I)\) or magnetic flux \((\phi) . V_{\text {induced }}=-\dfrac{d \phi}{d t}=-L \dfrac{d I}{d t}\). The negative sign is for Assertion to be true. So correct option is (1).
PHXII06:ELECTROMAGNETIC INDUCTION
358556
Assertion : Self induction arises when strength of current changes in same coil. Reason : In mutual induction, current changes in one coil effects the current in other coil also.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Self-induction is an inherent property of each coil . Assertion is correct. In mutual induction a change of current in one coil produces current change in other coil. So correct option is \((2)\).
PHXII06:ELECTROMAGNETIC INDUCTION
358557
The self inductance of a long solenoid cannot be increased by
1 Increasing the number of turns in it
2 Increasing its area of cross section
3 Changing the medium with greater permeability
4 Increasing the current through it
Explanation:
Self-inductance of a long solenoid does not depend upon the current flowing through it.
PHXII06:ELECTROMAGNETIC INDUCTION
358558
Statement A : When the current in a coil changes, it induces a back emf in the same coil. Statement B : Back Emf is a measure of the inertia of the coil against the change of current through it.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The back emf induced in the coil is the measure of the inertia of the coil against the change of current through it.