The diagram below shows a stationary circular coil of conducting wire connected to a low-resistance globe in a uniform, constant magnetic field, \(B\).
Question 5
The magnetic field is switched off.
Which one of the following best describes the globe in the circuit \( \textbf{before} \) the magnetic field is switched off, \( \textbf{during} \) the time the magnetic field is being switched off and \( \textbf{after} \) the magnetic field is switched off?
\( \textbf{Before} \) | \( \textbf{During} \) | \( \textbf{After}\) | |
A. | Off | On | Off |
B. | On | On | Off |
C. | On | Off | Off |
D. | Off | On | On |
Question 6
The radius of the coil is 5 cm and the magnetic field strength is 0.2 T. The coil has 100 loops. Assume that the magnetic field is perpendicular to the area of the coil.
Which one of the following is closest to the magnitude of the magnetic flux through the coil of wire when the magnetic field is switched on?
- 0.0016 Wb
- 0.16 Wb
- 16 Wb
- 1600 Wb