Conductors and Insulators , Dielectrics and Electric Polarization NEET Questions

Physics - Electrostatics

Conductors and Insulators , Dielectrics and Electric Polarization MCQ Questions


7.
Why does a metal spoon not get electrified when rubbed with our hand?
A.
No charge is produced on metal
B.
Friction is too weak
C.
Charges produced by friction leak through our body to the ground (both being conductors)
D.
Metal is an insulator
😑 View Answer Rough Work Error
ANSWER :
C. Charges produced by friction leak through our body to the ground (both being conductors)
8.
If a metal rod with a wooden or plastic handle is rubbed without touching its metal part, it shows charging because:
A.
The wooden/plastic handle insulates and prevents charge leakage
B.
The rod becomes a dielectric
C.
Friction works only with insulating handles
D.
Metal cannot be charged otherwise
😑 View Answer Rough Work Error
ANSWER :
A. The wooden/plastic handle insulates and prevents charge leakage
9.
When charge is transferred to a conductor, it:
A.
Stays at the point of contact
B.
Concentrates at the centre of the conductor
C.
Distributes over the entire surface of the conductor
D.
Vanishes immediately
😑 View Answer Rough Work Error
ANSWER :
C. Distributes over the entire surface of the conductor
10.
When charge is placed on an insulator, it:
A.
Moves to the centre
B.
Disappears quickly
C.
Spreads uniformly over the surface
D.
Stays at the same place where it was placed
😑 View Answer Rough Work Error
ANSWER :
D. Stays at the same place where it was placed
11.
Inside a conductor in electrostatic equilibrium, the electric field is:
A.
Equal to σ/2ε₀
B.
Zero
C.
Maximum
D.
Equal to σ/ε₀
😑 View Answer Rough Work Error
ANSWER :
B. Zero
12.
At the surface of a charged conductor, the electric field must be:
A.
Zero
B.
Normal (perpendicular) to the surface at every point
C.
At 45° to the surface
D.
Tangential to the surface
😑 View Answer Rough Work Error
ANSWER :
B. Normal (perpendicular) to the surface at every point