Question Detail

PHY 102 Test Compilation PHY 102 23 Objective Question

A 2 uF capacitor is charged to 50 V and then discharged through a 1 M-ohm resistor. Find the time for the capacitor voltage to drop to 25 V.

A 0.5 s

B 0.72 s

C 0.27 s

D 1.39 s

Correct Answer

Option D is the correct answer.

tau = RC = (1x106)(2x10-6) = 2 s. Dropping to half means t = tau x ln(2) = 2 x 0.693 = 1.386 s.

tau = RC = (1x106)(2x10-6) = 2 s.

Course: PHY 102

Topic: Test Compilation PHY 102 23

Type: Objective

Difficulty: Not specified

Question 1391 of 1819

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