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PHY 102 Test Compilation PHY 102 17 Objective Question
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Question

Four 20-Ω resistors are connected in parallel and the combination is connected to a 20-V emf device. The current in the device is:
Options
A 0.25 A
B 1.0 A
C 4.0 A
Correct Answer
D 5.0 A
Correct Answer

Option C is the correct answer.

Detailed Explanation

When 'n' identical resistors (R) are connected in parallel, the equivalent resistance (Req) is R/n.In this case, R = 20 Ω and n = 4.So, Req = 20 Ω / 4 = 5 Ω.According to Ohm's Law, Current (I) = Voltage (V) / Resistance (Req).I = 20 V / 5 Ω = 4.0 A.

Hint

Recall the formula for equivalent resistance of identical resistors in parallel and then apply Ohm's Law.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 17
Type: Objective
Difficulty: Not specified
Question 1114 of 1819
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