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PHY 102 Test Compilation PHY 102 18 Objective Question
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Question

Calculate the kinetic energy of an electron moving in a magnetic field of 1.2T under the influence of a force of 2.5×10⁻¹⁴N.
Options
A 7.7 × 10⁻²¹J
Correct Answer
B 5.4 × 10⁻²¹J
C 3.6 × 10⁻²¹J
D 1.9 × 10⁻²¹J
Correct Answer

Option A is the correct answer.

Detailed Explanation

From F = qvB, solve for v, then use KE = ½mv² with the electron's mass to find the kinetic energy, which comes out to about 7.7×10⁻²¹J.

Hint

First find the electron's speed from F = qvB, then plug into KE = ½mv².

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 18
Type: Objective
Difficulty: Not specified
Question 1153 of 1819
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