physics : class12 Statement of Superposition Principle : Superposition Principle : Electrostatics MCQ Questions and Answers
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Statement of Superposition Principle
MCQ questions and answers.
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MCQ Questions
1. According to the principle of superposition, the net electrostatic force on a charge due to several charges is
A.
The vector sum of the forces due to each charge separately
B.
The algebraic sum of the charges only
C.
The force due to the nearest charge only
D.
Always zero
Correct Answer:
The vector sum of the forces due to each charge separately
Explanation:
The superposition principle states that the total force is obtained by adding the individual forces due to all the other charges as vectors.
2. The electric field at a point due to multiple charges is equal to
A.
The field due to the largest charge only
B.
The vector sum of the fields due to all individual charges
C.
The product of the individual electric fields
D.
The average of the individual electric fields
Correct Answer:
The vector sum of the fields due to all individual charges
Explanation:
According to superposition, each charge produces its own electric field independently, and the net field is the vector sum of these individual fields.
3. When calculating the force on one charge in a system of charges, the force due to each other charge is considered
A.
Independently
B.
Only after removing the other charges
C.
As always equal to zero
D.
Only for charges of the same sign
Correct Answer:
Independently
Explanation:
The superposition principle allows the force due to each charge to be calculated separately, with the total force found by vector addition.
4. If three charges produce forces F1, F2, and F3 on a charge, the net force is
A.
F1 + F2 + F3 as vectors
B.
F1F2F3
C.
F1 only
D.
F1 + F2 + F3 as magnitudes in every case
Correct Answer:
F1 + F2 + F3 as vectors
Explanation:
Superposition requires the individual forces to be added vectorially because electrostatic force has both magnitude and direction.
5. The presence of other charges does not change the individual Coulomb force contribution of a particular charge. This statement represents
A.
The principle of superposition
B.
The law of conservation of charge
C.
The principle of charge quantization
D.
The law of electromagnetic induction
Correct Answer:
The principle of superposition
Explanation:
Superposition states that each charge contributes its force or field independently, and the total effect is obtained by adding all contributions.
6. For two electric fields acting at a point in the same direction, the resultant field according to superposition is
A.
The difference of their magnitudes
B.
The sum of their magnitudes in that direction
C.
Always zero
D.
Equal to the larger field only
Correct Answer:
The sum of their magnitudes in that direction
Explanation:
When individual fields point in the same direction, their vector sum has a magnitude equal to the sum of their magnitudes.
7. For two equal electric fields acting in opposite directions at a point, their resultant field is
A.
Twice either field
B.
Equal to one of the fields
C.
Zero
D.
Equal to the product of the fields
Correct Answer:
Zero
Explanation:
Opposite and equal vectors cancel when added according to the superposition principle, giving a zero resultant electric field.
8. The total electrostatic effect of a system of charges is found by
A.
Considering only positive charges
B.
Adding the individual effects of all charges
C.
Considering only the closest charge
D.
Ignoring the directions of the effects
Correct Answer:
Adding the individual effects of all charges
Explanation:
The statement of superposition says that the total force or electric field is the vector sum of the contributions from all charges.
9. The superposition principle is applicable to electrostatic forces because the total force on a charge is obtained by
A.
Adding the forces due to other charges individually
B.
Multiplying all individual forces
C.
Using only the force due to the first charge
D.
Subtracting every force from the largest force
Correct Answer:
Adding the forces due to other charges individually
Explanation:
Each surrounding charge exerts an individual electrostatic force, and the net force is their vector sum.
10. Which statement correctly expresses the superposition principle for electric fields?
A.
Electric fields cannot be added
B.
The net electric field is the vector sum of the individual electric fields
C.
Only the field of a positive charge is considered
D.
The net field is always equal to the field of the nearest charge
Correct Answer:
The net electric field is the vector sum of the individual electric fields
Explanation:
This is the direct statement of superposition for electric fields: the contribution from every charge is added vectorially to obtain the net field.