Physics Practice Test – Current Electricity and Electric Charges (Questions with Answers and Explanations)

A positively charged glass rod is placed near the cap of a positively charged electroscope. The divergence of the leaf is observed to ________

A. decreases     B. increases     C. remain the same     D. increase and collapse immediately.

A charge of 1.6 x 10^-10C is placed in a uniform electric field of intensity 2.0 x 10⁵ NC^-1. Calculate the magnitude of the electric force exerted on the charge.

A. 3.2 x 10⁵ N     B. 1.8 x 10⁵ N     C. 3.2 x 10^-5 N     D. 1.8 x 10^-5 N

Calculate the effective resistance between P and Q in the diagram shown above.