This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Electric Fields”.
1. The conventional direction of electric field is ________
a) Positive to negative
b) Negative to positive
c) No specific direction
d) Direction cannot be determined
View Answer
Explanation: The conventional direction of field lines is from positive to negative. The field lines originate at the positive charge and terminate at the negative charge.
2. Electric field originates at __________
a) Positive charge
b) Negative charge
c) Neither positive nor negative
d) Both positive and negative
View Answer
Explanation: Electric field originates at the positive charge and terminates at the negative charge. The conventional direction of the field is from positive to negative.
3. Electric field terminates at ________
a) Positive charge
b) Negative charge
c) Neither positive nor negative
d) Both positive and negative
View Answer
Explanation: Electric field originates at the positive charge and terminates at the negative charge. The conventional direction of the field is from positive to negative.
4. Which among the following statements is true with regard to electric field lines?
a) Electric field lines always intersect
b) Electric field lines may or may not intersect
c) Electric field lines can be seen
d) Electric field lines never intersect
View Answer
Explanation: Electric field lines can never intersect because tangent at any point on electric field lines represent the direction of electric field and if they intersect at a point it means that at that point there are two different directions for electric field which is not possible.
5. Which, among the following, is the field where electric charge experiences a force?
a) Electric field
b) Magnetic field
c) Gravitational field
d) Electric, magnetic and gravitational field
View Answer
Explanation: Charges experience a force in an electric field because charges come under the influence of a field which already has charges- electric field.
6. A field that spreads outwards in all directions is __________
a) Linear
b) Radial
c) Weak
d) Strong
View Answer
Explanation: A radial field is one which spreads in all directions. This field is known as the radial field because it spreads out radially from a source.
7. In uniform fields, all points have ________ field strength.
a) Zero
b) Same
c) Infinity
d) Different
View Answer
Explanation: A uniform field is one as the word suggests in which the field is spread over an area and at every point in the field strength of the field is the same.
8. Which, among the following is the correct expression for an electric field?
a) E=F/C
b) E=F*C
c) E=F/Q
d) E=F*Q
View Answer
Explanation: Electric field is the force per unit charge hence, the correct expression among the following is: E=F/Q.
9. What happens when one material is rubbed against another?
a) The material becomes electrically neutral
b) The material becomes electrically charged
c) The material becomes negatively charged
d) The material becomes positively charged
View Answer
Explanation: When one material is rubbed against another, there is a transfer of charges from one material to another hence the material becomes electrically charged.
10. The insulant between the two plates of a capacitor is called _______
a) Conductor
b) Semi-conductor
c) Dielectric
d) Superconductor
View Answer
Explanation: The material between the two plates of a capacitor is an insulator, more specifically known as a dielectric.
Sanfoundry Global Education & Learning Series – Basic Electrical Engineering.
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