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 other charges?
A.
The net force is the vector sum of the forces due to all individual charges
B.
The net force is always equal to the force due to the nearest charge
C.
The net force is always zero when more than one charge is present
D.
The net force is the product of all the individual forces
Correct Answer:
The net force is the vector sum of the forces due to all individual charges
Explanation:
According to the principle of superposition, the total electrostatic force is obtained by adding the individual forces vectorially.
2. According to the principle of superposition, the electric field at a point due to several charges is:
A.
The vector sum of the electric fields produced by the individual charges
B.
The electric field produced only by the largest charge
C.
Always equal to the electric field of the closest charge
D.
The product of the electric fields due to all charges
Correct Answer:
The vector sum of the electric fields produced by the individual charges
Explanation:
The principle states that the resultant electric field is found by adding the individual electric-field vectors at that point.
3. In applying the superposition principle, the force due to each charge is considered as if:
A.
The other charges were absent
B.
All other charges had the same magnitude
C.
The other charges were converted into neutral particles
D.
Only the nearest charge existed permanently
Correct Answer:
The other charges were absent
Explanation:
Each individual electrostatic force is calculated independently, as though the other source charges were not present, and then the forces are added vectorially.
4. The superposition principle is applicable when finding the resultant electrostatic force due to:
A.
Two or more charges
B.
Only one charge
C.
Only equal charges
D.
Only charges having the same sign
Correct Answer:
Two or more charges
Explanation:
The principle is used to determine the combined effect of multiple charges by adding their individual electrostatic forces.
5. How are individual electrostatic forces combined according to the superposition principle?
A.
They are added as vectors
B.
They are added only as ordinary numbers
C.
They are multiplied together
D.
They are divided by the number of charges
Correct Answer:
They are added as vectors
Explanation:
Electrostatic force has both magnitude and direction, so the individual forces must be combined using vector addition.
6. If several charges produce electric fields at a point, the resultant field depends on:
A.
The magnitude and direction of each individual field
B.
Only the number of charges
C.
Only the charge closest to the point
D.
The average value of the charges
Correct Answer:
The magnitude and direction of each individual field
Explanation:
Superposition requires the vector addition of all individual electric fields, so both their magnitudes and directions matter.
7. What is the total electrostatic effect of several charges according to the superposition principle?
A.
The sum of their individual electrostatic effects
B.
The effect of only the positive charges
C.
The effect of only the negative charges
D.
The effect of the charge with the greatest magnitude only
Correct Answer:
The sum of their individual electrostatic effects
Explanation:
The total electrostatic effect is obtained by adding the effects produced independently by each charge.
8. The superposition principle treats the force due to each source charge as:
A.
Independent of the presence of the other source charges
B.
Dependent only on the number of source charges
C.
Always equal to the total force
D.
Zero when another source charge is present
Correct Answer:
Independent of the presence of the other source charges
Explanation:
The principle states that each charge contributes its own force independently, and these contributions are then combined.
9. For three charges acting on a test charge, the net electrostatic force is found by:
A.
Adding the three individual force vectors
B.
Adding only the two largest forces
C.
Multiplying the three force magnitudes
D.
Using the force due to the middle charge only
Correct Answer:
Adding the three individual force vectors
Explanation:
The superposition principle requires the vector sum of the forces exerted by all three source charges on the test charge.
10. Which statement correctly describes the superposition principle in electrostatics?
A.
The resultant force or field is the vector sum of the individual contributions
B.
The resultant force or field is always greater than every individual contribution
C.
The resultant force or field is determined only by the total number of charges
D.
The resultant force or field is always in the direction of the largest charge
Correct Answer:
The resultant force or field is the vector sum of the individual contributions
Explanation:
The essential statement of superposition is that the net electrostatic force or electric field equals the vector sum of the separate contributions.