CBSE · English · Class 12 · 12 questions with solutions
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Assertion (A):
Electric field lines never intersect each other.
Reason (R):
At a given point, electric field has a unique direction.
Assertion (A):
Electric field inside a conductor in electrostatic equilibrium is zero.
Reason (R):
Free charges in a conductor rearrange themselves so that the net electric field inside becomes zero.
According to Gauss's law, the net electric flux through a closed surface is proportional to:
Total area of the surface
Electric field only
Net charge enclosed by the surface
✔Shape of the surface
The electric flux through a surface is maximum when the electric field is:
Parallel to the surface
Perpendicular to the surface
✔At 45° to the surface
Zero
If the distance between two point charges is doubled, the electrostatic force becomes:
2F
F/2
F/4
✔4F
Electric field lines:
Can intersect each other
Always form closed loops
Never intersect each other
✔Always remain parallel
The electric field inside a conductor in electrostatic equilibrium is:
Maximum
Minimum but non-zero
Zero
✔Infinite
Electric field at a point is defined as the force experienced by:
Any charge placed at that point
A unit positive test charge
✔A unit negative charge
An electron only
According to Coulomb's law, the electrostatic force between two charges is proportional to:
r
1/r
1/r^2
✔2r
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