358355
Assertion : Induced charge on a conductor does not contribute to electric field or potential at a given point. Reason : A point charge \(q_{0}\), is kept outside a solid metallic sphere, the electric field inside the sphere is zero.
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:
Induced charges on a conductor redistribute on its surface, not affecting the internal electric field or potential. The reason, (exemplified by metal solid sphere) states zero electric field inside a metallic conductor, supports and explains the assertion. So correct option is (2).
PHXII01:ELECTRIC CHARGES AND FIELDS
358356
Assertion : Polarisation is not possible under action of an external field if molecules of matter are non-polar. Reason : In presence of an external field, the polar molecules tend to align with the field and a net dipole moment results.
1 Both assertion and reason are correct and reason is the correct explanation of assertion
2 Both assertion and reason are correct but reason is not the correct explanation of assertion
3 Assertion is correct but reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Without an external field, the dipole moment of different molecules in a piece of matter are randomly oriented, so there is no net total dipole moment. In the presence of an external field, the polar molecules tend to align with the field and a net dipole moment results. Non-polar molecules undergo polarisation and develop dipole moment in presence of electric field.
PHXII01:ELECTRIC CHARGES AND FIELDS
358357
Assertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same. Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased.
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:
When an uncharged bob of a pendulum is placed in an electric field, it does not affect its time period as no electric force can be experienced by the bob since it is neutral. So, the acceleration of the bob remains same, i.e., \(g\) and hence its time period. But when a charged bob of a pendulum is placed in horizontal electric field, the bob experiences an electric force in horizontal direction due to which the effective value of increases. Hence its time period decreases.
AIIMS - 2012
PHXII01:ELECTRIC CHARGES AND FIELDS
358358
Assertion : A metallic shield in form of a hollow shell may be built to block an electric field. Reason : In a hollow spherical shield, the electric field inside it is zero at every point.
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:
In metallic shield, due to \(\vec{E}\), charge is induced \(\Rightarrow\) At any point \(\vec{E}=0\). Hollow shell is useful to block \(\vec{E}\). So, correct option is (1).
358355
Assertion : Induced charge on a conductor does not contribute to electric field or potential at a given point. Reason : A point charge \(q_{0}\), is kept outside a solid metallic sphere, the electric field inside the sphere is zero.
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:
Induced charges on a conductor redistribute on its surface, not affecting the internal electric field or potential. The reason, (exemplified by metal solid sphere) states zero electric field inside a metallic conductor, supports and explains the assertion. So correct option is (2).
PHXII01:ELECTRIC CHARGES AND FIELDS
358356
Assertion : Polarisation is not possible under action of an external field if molecules of matter are non-polar. Reason : In presence of an external field, the polar molecules tend to align with the field and a net dipole moment results.
1 Both assertion and reason are correct and reason is the correct explanation of assertion
2 Both assertion and reason are correct but reason is not the correct explanation of assertion
3 Assertion is correct but reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Without an external field, the dipole moment of different molecules in a piece of matter are randomly oriented, so there is no net total dipole moment. In the presence of an external field, the polar molecules tend to align with the field and a net dipole moment results. Non-polar molecules undergo polarisation and develop dipole moment in presence of electric field.
PHXII01:ELECTRIC CHARGES AND FIELDS
358357
Assertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same. Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased.
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:
When an uncharged bob of a pendulum is placed in an electric field, it does not affect its time period as no electric force can be experienced by the bob since it is neutral. So, the acceleration of the bob remains same, i.e., \(g\) and hence its time period. But when a charged bob of a pendulum is placed in horizontal electric field, the bob experiences an electric force in horizontal direction due to which the effective value of increases. Hence its time period decreases.
AIIMS - 2012
PHXII01:ELECTRIC CHARGES AND FIELDS
358358
Assertion : A metallic shield in form of a hollow shell may be built to block an electric field. Reason : In a hollow spherical shield, the electric field inside it is zero at every point.
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:
In metallic shield, due to \(\vec{E}\), charge is induced \(\Rightarrow\) At any point \(\vec{E}=0\). Hollow shell is useful to block \(\vec{E}\). So, correct option is (1).
358355
Assertion : Induced charge on a conductor does not contribute to electric field or potential at a given point. Reason : A point charge \(q_{0}\), is kept outside a solid metallic sphere, the electric field inside the sphere is zero.
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:
Induced charges on a conductor redistribute on its surface, not affecting the internal electric field or potential. The reason, (exemplified by metal solid sphere) states zero electric field inside a metallic conductor, supports and explains the assertion. So correct option is (2).
PHXII01:ELECTRIC CHARGES AND FIELDS
358356
Assertion : Polarisation is not possible under action of an external field if molecules of matter are non-polar. Reason : In presence of an external field, the polar molecules tend to align with the field and a net dipole moment results.
1 Both assertion and reason are correct and reason is the correct explanation of assertion
2 Both assertion and reason are correct but reason is not the correct explanation of assertion
3 Assertion is correct but reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Without an external field, the dipole moment of different molecules in a piece of matter are randomly oriented, so there is no net total dipole moment. In the presence of an external field, the polar molecules tend to align with the field and a net dipole moment results. Non-polar molecules undergo polarisation and develop dipole moment in presence of electric field.
PHXII01:ELECTRIC CHARGES AND FIELDS
358357
Assertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same. Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased.
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:
When an uncharged bob of a pendulum is placed in an electric field, it does not affect its time period as no electric force can be experienced by the bob since it is neutral. So, the acceleration of the bob remains same, i.e., \(g\) and hence its time period. But when a charged bob of a pendulum is placed in horizontal electric field, the bob experiences an electric force in horizontal direction due to which the effective value of increases. Hence its time period decreases.
AIIMS - 2012
PHXII01:ELECTRIC CHARGES AND FIELDS
358358
Assertion : A metallic shield in form of a hollow shell may be built to block an electric field. Reason : In a hollow spherical shield, the electric field inside it is zero at every point.
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:
In metallic shield, due to \(\vec{E}\), charge is induced \(\Rightarrow\) At any point \(\vec{E}=0\). Hollow shell is useful to block \(\vec{E}\). So, correct option is (1).
358355
Assertion : Induced charge on a conductor does not contribute to electric field or potential at a given point. Reason : A point charge \(q_{0}\), is kept outside a solid metallic sphere, the electric field inside the sphere is zero.
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:
Induced charges on a conductor redistribute on its surface, not affecting the internal electric field or potential. The reason, (exemplified by metal solid sphere) states zero electric field inside a metallic conductor, supports and explains the assertion. So correct option is (2).
PHXII01:ELECTRIC CHARGES AND FIELDS
358356
Assertion : Polarisation is not possible under action of an external field if molecules of matter are non-polar. Reason : In presence of an external field, the polar molecules tend to align with the field and a net dipole moment results.
1 Both assertion and reason are correct and reason is the correct explanation of assertion
2 Both assertion and reason are correct but reason is not the correct explanation of assertion
3 Assertion is correct but reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Without an external field, the dipole moment of different molecules in a piece of matter are randomly oriented, so there is no net total dipole moment. In the presence of an external field, the polar molecules tend to align with the field and a net dipole moment results. Non-polar molecules undergo polarisation and develop dipole moment in presence of electric field.
PHXII01:ELECTRIC CHARGES AND FIELDS
358357
Assertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same. Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased.
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:
When an uncharged bob of a pendulum is placed in an electric field, it does not affect its time period as no electric force can be experienced by the bob since it is neutral. So, the acceleration of the bob remains same, i.e., \(g\) and hence its time period. But when a charged bob of a pendulum is placed in horizontal electric field, the bob experiences an electric force in horizontal direction due to which the effective value of increases. Hence its time period decreases.
AIIMS - 2012
PHXII01:ELECTRIC CHARGES AND FIELDS
358358
Assertion : A metallic shield in form of a hollow shell may be built to block an electric field. Reason : In a hollow spherical shield, the electric field inside it is zero at every point.
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:
In metallic shield, due to \(\vec{E}\), charge is induced \(\Rightarrow\) At any point \(\vec{E}=0\). Hollow shell is useful to block \(\vec{E}\). So, correct option is (1).