Electrostatic Potential MCQs : This section focuses on the "Electrostatic Potential" in Physics Class 12. These Multiple Choice Questions (MCQs) should be practiced to improve the Physics Class 12 skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
The electrostatic potential is also known as the?
A. electric field potential
B. electric potential
C. potential drop
D. All of the above
View Answer
Ans : D
Explanation: The electrostatic potential is also known as the electric field potential, electric potential, or potential drop.
Question 2
SI unit of electrostatic potential?
A. joule
B. watt
C. volt
D. coulomb
View Answer
Ans : C
Explanation: SI unit of electrostatic potential: volt
Question 3
Symbol of electrostatic potential is V?
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: True, Symbol of electrostatic potential V
Question 4
q1q2 in formula denotes?
A. distance
B. charges
C. electric potential
D. constant
View Answer
Ans : B
Explanation: q1 and q2 are the two charges that are separated by the distance d.
Question 5
What is the dimension of electric potential?
A. [M L T-2]
B. [M L T-3 I]
C. [M L T-3 I-1]
D. [M L2 T-3 I]
View Answer
Ans : C
Explanation: Potential can be simply defined as work done on a unit charge, therefore the dimension is [M L T-3 I-1]. The dimension of potential energy in mechanics is not the same as electric potential energy though both of them are the unit of energy. In mechanics, it is defined as work done on a unit mass.
Question 6
Earth’s potential is _______
A. infinite
B. zero
C. Highly positive
D. Highly negative
View Answer
Ans : B
Explanation: We consider earth as the storage of infinite positive as well as a negative charge. Therefore, the potential of the earth is always considered to be zero and the potential of every body is measured with respect to earth. That’s why if we connect any charged body to the earth, its potential instantaneously becomes zero.
Question 7
If a charged body is moved in an electric field against the Coulomb force, then ________
A. Work is done by the electric field
B. Electric field intensity decreases
C. The total energy of the system decreases
D. Work is done on the body by an external agent
View Answer
Ans : D
Explanation: To move a body against some force, work is to be done on the body. In this case, an external force is to be applied on the body to move it i.e. an external work is to be done. As we are moving the body against the Coulomb’s force, hence no work is done on the body by the electric field.
Question 8
Electrostatic potential energy can be negative.
A. Yes
B. No
C. Can be yes or no
D. Can not say
View Answer
Ans : A
Explanation: If the charge q is negative, the sign should be considered in the equation. Therefore, a system consisting of negative and positive point charges will have negative potential energy. A negative potential energy means that work must be done against the electric field in order to move the charges apart.
Question 9
Electrostatic field is vector quantity?
A. Yes
B. No
C. Can be yes or no
D. Can not say
View Answer
Ans : A
Explanation: Yes, In classical electrostatics, the electrostatic field is a vector quantity which is expressed as the gradient of the electrostatic potential, which is a scalar quantity denoted by V.
Question 10
Electric potential is always a continuous function in space.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: True, electric potential is always a continuous function in space.