357549
The resistance of platinum wire at \(0^\circ \,C\) is \(2 \Omega\) and \(6.8\,\Omega \) at \(80^\circ \,C.\) The temperature coefficient of resistance of the wire is:
357550
Nichrome or manganin is widely used in wire bound standard resistors, because of their
1 temperature independent resistivity
2 very weakly temperature dependent resistivity
3 strong dependence of resistivity with temperature
4 mechanical strength
Explanation:
Nichrome and manganin are widely used in wire bound standard resistors, because their resistivity is very weakly dependent on temperature.
PHXII03:CURRENT ELECTRICITY
357551
Assertion : Resistance of a conductor increases with rise in temperature. Reason : \(V-I\) graph for a conductor at two different temperatures \(T_{1}\) and \(T_{2}\) are shown (In graph \(T_{1}>T_{2}\) )
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:
The resistance of a conductor indeed increases with an increase in temperature. As temperature rises, the kinetic energy of the electrons in the conductor increases, leading to more frequent collisions with lattice ions. This increased collision frequency results in higher resistance. So correct option is (3).
PHXII03:CURRENT ELECTRICITY
357552
Assertion : Material used in the construction of a standard resistance is constantan or manganin. Reason : Temperature coefficient of resistance of constantan is very small.
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:
These alloys, constantan or manganin, are chosen for making standard resistances because they possess high resistivity and low temperature coefficients of resistance. This ensures that their resistance remains stable. So correct option is (1).
357549
The resistance of platinum wire at \(0^\circ \,C\) is \(2 \Omega\) and \(6.8\,\Omega \) at \(80^\circ \,C.\) The temperature coefficient of resistance of the wire is:
357550
Nichrome or manganin is widely used in wire bound standard resistors, because of their
1 temperature independent resistivity
2 very weakly temperature dependent resistivity
3 strong dependence of resistivity with temperature
4 mechanical strength
Explanation:
Nichrome and manganin are widely used in wire bound standard resistors, because their resistivity is very weakly dependent on temperature.
PHXII03:CURRENT ELECTRICITY
357551
Assertion : Resistance of a conductor increases with rise in temperature. Reason : \(V-I\) graph for a conductor at two different temperatures \(T_{1}\) and \(T_{2}\) are shown (In graph \(T_{1}>T_{2}\) )
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:
The resistance of a conductor indeed increases with an increase in temperature. As temperature rises, the kinetic energy of the electrons in the conductor increases, leading to more frequent collisions with lattice ions. This increased collision frequency results in higher resistance. So correct option is (3).
PHXII03:CURRENT ELECTRICITY
357552
Assertion : Material used in the construction of a standard resistance is constantan or manganin. Reason : Temperature coefficient of resistance of constantan is very small.
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:
These alloys, constantan or manganin, are chosen for making standard resistances because they possess high resistivity and low temperature coefficients of resistance. This ensures that their resistance remains stable. So correct option is (1).
357549
The resistance of platinum wire at \(0^\circ \,C\) is \(2 \Omega\) and \(6.8\,\Omega \) at \(80^\circ \,C.\) The temperature coefficient of resistance of the wire is:
357550
Nichrome or manganin is widely used in wire bound standard resistors, because of their
1 temperature independent resistivity
2 very weakly temperature dependent resistivity
3 strong dependence of resistivity with temperature
4 mechanical strength
Explanation:
Nichrome and manganin are widely used in wire bound standard resistors, because their resistivity is very weakly dependent on temperature.
PHXII03:CURRENT ELECTRICITY
357551
Assertion : Resistance of a conductor increases with rise in temperature. Reason : \(V-I\) graph for a conductor at two different temperatures \(T_{1}\) and \(T_{2}\) are shown (In graph \(T_{1}>T_{2}\) )
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:
The resistance of a conductor indeed increases with an increase in temperature. As temperature rises, the kinetic energy of the electrons in the conductor increases, leading to more frequent collisions with lattice ions. This increased collision frequency results in higher resistance. So correct option is (3).
PHXII03:CURRENT ELECTRICITY
357552
Assertion : Material used in the construction of a standard resistance is constantan or manganin. Reason : Temperature coefficient of resistance of constantan is very small.
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:
These alloys, constantan or manganin, are chosen for making standard resistances because they possess high resistivity and low temperature coefficients of resistance. This ensures that their resistance remains stable. So correct option is (1).
357549
The resistance of platinum wire at \(0^\circ \,C\) is \(2 \Omega\) and \(6.8\,\Omega \) at \(80^\circ \,C.\) The temperature coefficient of resistance of the wire is:
357550
Nichrome or manganin is widely used in wire bound standard resistors, because of their
1 temperature independent resistivity
2 very weakly temperature dependent resistivity
3 strong dependence of resistivity with temperature
4 mechanical strength
Explanation:
Nichrome and manganin are widely used in wire bound standard resistors, because their resistivity is very weakly dependent on temperature.
PHXII03:CURRENT ELECTRICITY
357551
Assertion : Resistance of a conductor increases with rise in temperature. Reason : \(V-I\) graph for a conductor at two different temperatures \(T_{1}\) and \(T_{2}\) are shown (In graph \(T_{1}>T_{2}\) )
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:
The resistance of a conductor indeed increases with an increase in temperature. As temperature rises, the kinetic energy of the electrons in the conductor increases, leading to more frequent collisions with lattice ions. This increased collision frequency results in higher resistance. So correct option is (3).
PHXII03:CURRENT ELECTRICITY
357552
Assertion : Material used in the construction of a standard resistance is constantan or manganin. Reason : Temperature coefficient of resistance of constantan is very small.
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:
These alloys, constantan or manganin, are chosen for making standard resistances because they possess high resistivity and low temperature coefficients of resistance. This ensures that their resistance remains stable. So correct option is (1).
