Practice Test (Multiple-Choice
Questions)
Time: 50 minutes 40 questions
Directions: Each of the following questions or statements is followed by four possible answers. Choose the
one best answer for each question.
1. The electric field can deflect:
a).neutrons b).X-rays c).Ɣ-rays d).α-particles
2. If air is dielectric between plates of a capacitor, by doubling the distance between the
plates and reducing area to 1/3 of the original value, its capacitance becomes:
a).10 times b).6 times c).1/6 times d).1/10 times
3. The direction of field lines around a charge +q is:
a).radially inward b).radially outward c).parallel d).perpendicular
4. When vector area is held perpendicular to electric field lines, magnitude of electric flux
is:
a).maximum b).minimum c).negative d).equal
5. Due to polarization of the dielectric, capacitance of capacitor:
a).increases b).zero c).decreases d).no change
6. If a charged body is moved against electric field, it will gain:
a).potential energy b).kinetic energy c).energy d).mechanical energy
7. The energy stored in a capacitor is:
a).1/2CV b).1/2CV2 c).2CV2 d).1/2CV2
8. Electrostatic force as compared to gravitational force is:
a).very weak b).very strong c).half d).equal
9. Coulomb’s law holds for:
a).medium charges b).large charges c).point charges d).all
