Electric Fields Quiz - CBSE Class 12 Physics

Free practice quiz: Electric Fields (CBSE Class 12 Physics). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Physics practice quiz has 20 multiple-choice questions on Electric Fields, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the electric field due to a point charge?

   1. A scalar quantity
   2. A vector quantity
   3. Constant in direction
   4. None of the above
   Show answer

   Answer: B. A vector quantity

   The electric field due to a point charge is defined as a vector quantity because it has both magnitude and direction, pointing away from positive charges and towards negative charges.

2. If the charge is doubled, what happens to the electric field strength?

   1. It doubles
   2. It halves
   3. It remains the same
   4. It quadruples
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   Answer: A. It doubles

   The electric field (E) due to a point charge (Q) is directly proportional to the charge. Doubling the charge results in a doubling of the electric field strength.

3. Which of the following configurations produces a uniform electric field?

   1. A single point charge
   2. Two parallel plates with opposite charges
   3. A charged sphere
   4. A dipole
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   Answer: B. Two parallel plates with opposite charges

   A uniform electric field is produced between two parallel plates with equal and opposite charges, creating a constant strength and direction of the field in that region.

4. What happens to the electric field of a dipole at a large distance?

   1. Becomes negligible
   2. Becomes weaker rapidly
   3. Behaves like a point charge
   4. Remains constant
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   Answer: B. Becomes weaker rapidly

   At a large distance, the electric field of a dipole decreases much faster than that of a point charge due to the cancellation between positive and negative charges.

5. What kind of electric field do charged plates create between them?

   1. Varying electric field
   2. Uniform electric field
   3. Non-uniform electric field
   4. Zero electric field
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   Answer: B. Uniform electric field

   Charged plates create a uniform electric field between them as the electric field lines are parallel and equidistant, indicating a constant field strength.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which unit is used to measure electric field strength?
2. What is the main effect of electric fields on charges?
3. What determines the direction of the electric field around a positive point charge?
4. What is the electric field at a point midway between two equal charges of opposite sign?
5. The principle of superposition applies to which of the following?
6. Electric field lines never cross because...
7. Which method can be used to visualize electric fields?
8. The electric field due to a uniform charged sheet is...
9. How does distance affect the electric field of a point charge?
10. The direction of the electric field is defined as...
11. Which of the following phenomena can electric fields explain?
12. Electric flux through a surface is proportional to...
13. In which context is Gauss's law particularly useful for electric fields?
14. What is the charge of an electron?
15. Which statement is true for conductors in electrostatic equilibrium?

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