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. What does the principle of superposition state for the electrostatic force on a charge due to several charges?
A.
The net force is the vector sum of the forces due to each charge separately
B.
The net force is always equal to the largest individual force
C.
The net force is the product of all individual forces
D.
The net force is always zero when more than one charge is present
Correct Answer:
The net force is the vector sum of the forces due to each charge separately
Explanation:
According to the superposition principle, the total electrostatic force is obtained by adding the individual force vectors produced by each source charge.
2. When several charges act on a test charge, the force due to any one charge is considered independently of the other charges. This is a statement of which principle?
A.
Conservation of charge
B.
Superposition principle
C.
Quantization of charge
D.
Law of charging by induction
Correct Answer:
Superposition principle
Explanation:
The superposition principle states that each charge produces its force independently, and the total force is found by adding all these individual forces.
3. The resultant electric field at a point due to several charges is found by
A.
Adding the electric field vectors due to the charges
B.
Adding only the magnitudes of the charges
C.
Multiplying the electric fields due to the charges
D.
Using only the field produced by the nearest charge
Correct Answer:
Adding the electric field vectors due to the charges
Explanation:
The superposition principle requires the electric field contributions from all charges to be added vectorially to obtain the resultant field.
4. If three charges produce forces F1, F2, and F3 on a charge, the net force according to the superposition principle is
A.
F1 + F2 + F3 as a vector sum
B.
F1 × F2 × F3
C.
F1 divided by F2 + F3
D.
Only F3
Correct Answer:
F1 + F2 + F3 as a vector sum
Explanation:
The total force is the vector sum of the individual forces produced separately by all three charges.
5. According to the superposition principle, the presence of other charges does not change
A.
The individual force produced by a particular charge
B.
The number of charges in the system
C.
The sign of every charge
D.
The distance between every pair of charges
Correct Answer:
The individual force produced by a particular charge
Explanation:
Each charge contributes its own force independently; the other charges do not alter that individual contribution. The contributions are then added.
6. For two electrostatic forces acting in the same direction, the magnitude of the resultant force is found by
A.
Adding their magnitudes
B.
Subtracting the smaller magnitude from the larger magnitude
C.
Multiplying their magnitudes
D.
Dividing their magnitudes
Correct Answer:
Adding their magnitudes
Explanation:
The superposition principle uses vector addition. For forces in the same direction, their magnitudes are added.
7. For two electrostatic forces acting in opposite directions, the magnitude of the resultant force is found by
A.
Adding their magnitudes without considering direction
B.
Subtracting the smaller magnitude from the larger magnitude
C.
Multiplying the two magnitudes
D.
Taking the average of the two magnitudes
Correct Answer:
Subtracting the smaller magnitude from the larger magnitude
Explanation:
Because opposite-directed forces have opposite signs in vector addition, the resultant magnitude is the difference between their magnitudes.
8. The superposition principle can be applied to determine the electric field produced by
A.
A system of several charges
B.
Only a single positive charge
C.
Only two equal charges
D.
Only charges at the same position
Correct Answer:
A system of several charges
Explanation:
The principle states that the total electric field of several charges is the vector sum of the fields produced by each charge individually.
9. In applying the superposition principle, the total electrostatic effect is obtained by considering
A.
Each source charge separately and then combining the effects
B.
Only the charge with the greatest magnitude
C.
The average effect of all charges
D.
The effect of charges without considering their directions
Correct Answer:
Each source charge separately and then combining the effects
Explanation:
Superposition involves calculating the contribution of every charge independently and adding the contributions with their proper directions.
10. Which statement correctly describes the superposition principle for electrostatic fields?
A.
The resultant field is the vector sum of the fields due to individual charges
B.
The resultant field is always equal to the field of the strongest charge
C.
The fields of different charges cancel automatically
D.
Only fields due to positive charges are added
Correct Answer:
The resultant field is the vector sum of the fields due to individual charges
Explanation:
The electrostatic field at a point due to multiple charges is obtained by vectorially adding the field produced by each charge separately.