A Bar Magnet Is Pushed Through a Coil of Wire

question 130

Multiple Choice

A bar magnet is pushed through a coil of wire of cross-sectional area 0.020 m² as shown in the figure. The coil has seven turns, and the rate of change of the strength of the magnetic field in it due to the motion of the bar magnet is 0.040 T/s. What is the magnitude of the induced emf in that coil of wire?

• A) 5.6 × 10^-3 V
• B) 5.6 × 10^-2 V
• C) 5.6 × 10^-1 V
• D) 5.6 × 10^-4 V
• E) 5.6 × 10^-5 V

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Definitions:

Chi-Squared Distribution

A probability distribution used in statistical hypothesis tests that is built by squaring independent standard normal random variables.

Random Variable

A measurable variable with outcomes based on the randomness of specific incidents.

Significance Level

The threshold below which a p-value is considered statistically significant, typical levels are 0.05, 0.01, etc., indicating the probability of rejecting the null hypothesis when it is true.

Normal Population

A population in which the data follows a normal distribution, characterized by a bell-shaped curve where most observations cluster around the central peak and probabilities for values taper off symmetrically towards the extremes.