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PHY 102 Last Minute Prep Objective Question
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Question

Electric spark is observed between two plates 2.5cm apart in air at 60kV. Determine the maximum electric field air can support.
Options
A 2.4×10⁶ V/m
Correct Answer
B 2.4×10⁵ V/m
C 3.0×10⁶ V/m
D 3.0×10⁵ V/m
Correct Answer

Option A is the correct answer.

Detailed Explanation

E = V/d = 60,000 / 0.025 = 2.4×10⁶ V/m

Hint

Electric field strength is the voltage gradient between the plates.

Question Info

Course: PHY 102
Topic: Last Minute Prep
Type: Objective
Difficulty: Not specified
Question 1678 of 1819
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