A conducting bar is free to slide horizontally on the rails of a conducting fram
ID: 3899565 • Letter: A
Question
A conducting bar is free to slide horizontally on the rails of a conducting frame, as shown in the figure. A lightbulb is attached to the right end of the rails. A spatially uniform magnetic field is oriented vertically (perpendicular to the horizontal plane of the rails and bar). Initially the bar is stationary. The strength of the magnetic field begins increasing in time at a constant rate, which induces a current through the bar, frame, and lightbulb. The bar begins to move due to the magnetic force exerted on it. Once the bar begins to move, the brightness of the lightbulb
Options:
Second question:
A circular coil lies flat on a horizontal table. A bar magnet is held above its center with its north pole pointing down, and released. As it approaches the coil, the falling magnet induces (when viewed from above)
Options:
no current in the coil
a clockwise current in the coil
a counterclockwise current in the coil
a current whose direction cannot be determined from the information provided
depends on the polarity of the magnet
depends on the speed of the magnet
Explanation / Answer
ans1>increses.. answer2>a clockwise current in the coil
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.