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.

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
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   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.

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