Post Utme Rhema University 2020 Physics Question 18

Practice objective / multiple choice question 18 from the 2020 Post Utme Rhema University Physics examination.

Post Utme Rhema University 2020 Physics Objective / Multiple Choice
Question 18 POST_UTME_RHEMA_UNIVERSITY • 2020 • PHYSICS • objective
Post Utme Rhema University 2020 Physics Question 18 diagram

A coil of wire of radius $r$ and resis\tance $R$ is connected to a battery of emf $\mathcal{E}$ through a switch. Calculate the current $I$ in the coil at time $t$ after the switch is closed.

Answer Options

Correct Answer A. I = \frac{\mathcal{E}}{R}\( 1 - e^{-t/RC} \)
B. I = \frac{\mathcal{E}}{R}\( 1 + e^{-t/RC} \)
C. I = \frac{\mathcal{E}}{R}\( e^{-t/RC} - 1 \)
D. I = \frac{\mathcal{E}}{R}\( e^{t/RC} - 1 \)
Correct Answer
A
Correct Option:
I = \frac{\mathcal{E}}{R}\( 1 - e^{-t/RC} \)

About This Question

This is Post Utme Rhema University 2020 Physics Question 18. It is one of the objective questions from the 2020 Post Utme Rhema University Physics examination.

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