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DC Pandey: Electricity & Magnetism

JEE Physics • 10 questions • Free on ExamBattle

Practice Questions

1. Q1

   [DC Pandey] A capacitor of 4 μF is charged to 100 V. The energy stored is:

   • A. 0.02 J
   • B. 0.04 J
   • C. 0.2 J
   • D. 0.4 J

2. Q2

   [DC Pandey] A current of 2 A flows in a wire of length 0.5 m placed in a magnetic field B = 0.4 T at 90°. The force on the wire is:

   • A. 0.4 N
   • B. 0.2 N
   • C. 0.8 N
   • D. 0.1 N

3. Q3

   [DC Pandey] The electric field inside a uniformly charged hollow sphere is:

   • A. Maximum at center
   • B. Zero
   • C. Equal to that at surface
   • D. Proportional to radius

4. Q4

   [DC Pandey] The time constant of an RC circuit with R = 2 kΩ and C = 5 μF is:

   • A. 0.01 s
   • B. 0.1 s
   • C. 1 s
   • D. 0.001 s

5. Q5

   [DC Pandey] An electron enters a magnetic field B perpendicular to its velocity. The path of the electron is:

   • A. Parabolic
   • B. Circular
   • C. Helical
   • D. Straight line

6. Q6

   [DC Pandey] The equivalent resistance between A and B of three 6Ω resistors in delta (triangle) configuration (between any two nodes) is:

   • A. 4 Ω
   • B. 6 Ω
   • C. 9 Ω
   • D. 3 Ω

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