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#1 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

Two point charges each equal to 2 mC are 0.5 m apart. If both of them exist inside vacuum, then electrostatic force between them is:

A. 1.44 × 10⁵ N

B. 1.44 × 10⁴ N

C. 1.44 × 10³ N

D. 1.44 × 10² N

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#2 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

The electric field at a distance 2 cm from the centre of a hollow spherical conducting shell of radius 4 cm having a charge of 2 × 10⁻³ C on its surface is:

A. Zero

B. 4.5 × 10⁷ N/C

C. 2.25 × 10⁷ N/C

D. 9 × 10⁹ N/C

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#3 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

A charge q is placed at the centre of the line joining two equal point charges each equal to +Q. The system of three charges will be in equilibrium, if q is equal to:

A. +Q/2

B. -Q/2

C. +Q/4

D. -Q/4

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#4 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

An electric dipole placed in an electric field of intensity 2 × 10⁵ N/C at an angle of 30° experiences a torque equal to 4 N·m. The charge on the dipole of dipole length 2 cm is:

A. 7 µC

B. 8 mC

C. 2 mC

D. 5 mC

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#5 Class Class 12 Physics Electric Charge and Field 2024 Short 2M

A conducting wire connects two charged conducting spheres of radii r₁ and r₂ such that they attain equilibrium with respect to each other. The distance of separation between the two spheres is very large as compared to either of their radii. Find the ratio of the magnitudes of the electric fields at the surfaces of the spheres of radii r₁ and r₂.

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#6 Class Class 12 Physics Electric Charge and Field 2021 Mcq 1M

Three charges, each equal to +q, are placed at the corners of an equilateral triangle. If the force between any two charges is F, then net force on either charge will be:

A. 2F

B. 3F

C. √2 F

D. √3 F

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#7 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

Three point charges are placed at the corners of an equilateral triangle. Assuming only electrostatic forces are acting, the system:

A. Can never be in equilibrium

B. Will be in equilibrium if charges rotate about the centre of the triangle

C. Will be in equilibrium if charges have same magnitude but different signs

D. Will be in equilibrium if charges have different magnitudes and different signs

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#8 Class Class 12 Physics Electric Charge and Field 2011 Mcq 1M

Two charged spheres separated by a distance d exert some force F on each other. If they are immersed in a liquid of dielectric constant 4, then what is the force exerted, if all other conditions are same?

A. 2F

B. 4F

C. F/2

D. F/4

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#9 Class Class 12 Physics Electric Charge and Field 2024 Mcq 1M

The electrostatic field is:

A. conservative

B. non-conservative

C. both (a) and (b)

D. none of these

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#10 Class Class 12 Physics Electric Charge and Field 2019 Mcq 1M

When a body is charged, its mass:

A. increases

B. decreases

C. remains same

D. may increase or decrease

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#11 Class Class 12 Physics Electric Charge and Field 2019 Mcq 1M

When a body is connected to the earth, then electrons from the earth flow into the body. It means that the body is:

A. unchanged

B. an insulator

C. positively charged

D. negatively charged

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#12 Class Class 12 Physics Electric Charge and Field 2021 Mcq 1M

Ampere-hour is unit of:

A. Power

B. Charge

C. Energy

D. Potential difference

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#13 Class Class 12 Physics Electric Charge and Field 2023 Mcq 1M

The magnitude of the electric field due to a point charge object at a distance of 4.0 m is 9 N/C. From the same charged object the electric field of magnitude 16 N/C will be at a distance of:

A. 1 m

B. 2 m

C. 3 m

D. 6 m

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