Electricity and Magnetism AFCAT Questions

AFCAT Physics

Electricity and Magnetism MCQ Questions


13.
The principle of superposition for electrostatic forces states that:
A.
Forces cancel each other
B.
Net force is the scalar sum
C.
Net force is the vector sum of individual forces
D.
Net force is the average
😑 View Answer Rough Work Error
ANSWER :
C. Net force is the vector sum of individual forces
14.
Electric charge is conserved means:
A.
Charge decreases with time
B.
Charge can be created freely
C.
Charge increases with time
D.
Total charge in an isolated system is constant
😑 View Answer Rough Work Error
ANSWER :
D. Total charge in an isolated system is constant
15.
If F is the force between two charges in air, and they are immersed in water (K = 80), the new force is:
A.
F/80
B.
80F
C.
F
D.
F/√80
😑 View Answer Rough Work Error
ANSWER :
A. F/80
16.
Electric field intensity E at a point is defined as:
A.
Charge per unit area
B.
Force per unit positive test charge
C.
Energy per unit charge
D.
Force on any charge
😑 View Answer Rough Work Error
ANSWER :
B. Force per unit positive test charge
17.
The SI unit of electric field intensity is:
A.
C/N
B.
J/C
C.
V·m
D.
N/C or V/m
😑 View Answer Rough Work Error
ANSWER :
D. N/C or V/m
18.
The electric field due to a point charge q at distance r is:
A.
kq/r
B.
kq²/r
C.
kq/r²
D.
kq²/r²
😑 View Answer Rough Work Error
ANSWER :
C. kq/r²