Question
Bar magnets are moved into the wire coils in identical quick fashion. Voltage induced in each coil causes a current, as indicated on the galvanometer. Ignore the electrical resistance in the loops in the coil, and rank from greatest to least the readings on the galvanometer.
Step 1
Step 1: The voltage induced in a coil is given by the formula $V = n \Delta B / \Delta t$, where $n$ is the number of turns in the coil, $\Delta B$ is the change in magnetic field strength, and $\Delta t$ is the time interval. Show more…
Show all steps
Your feedback will help us improve your experience
Prashant Bana and 66 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Consider what will happen when a bar magnet is pushed toward the coil. when the coil "feels" the changing magnetic field caused by the approach of the bar magnet, it will thereby become energized; a current will begin to flow through it, and the ammeter will register that current. this current is called an induced current because it has been induced by the person
A bar magnet approaches a coil as shown. (a) In which direction does current flow through the galvanometer as the magnet approaches? (b) How does the magnitude of the current depend on the number of turns in the coil? (The resistance of the coil is negligible compared with the resistance of the galvanometer.) (c) How does the current depend on the speed of the magnet? (d) Would the experiment give similar results if the magnet remains stationary and the coil moves to the left instead? Explain.
A bar magnet is initially far from a circular loop of wire. The magnet is moved at constant speed along the axis of the loop. It moves toward the loop, proceeds to pass through it, and then continues until it is far away on the right side of the loop. Sketch a qualitative graph of the current in the loop as a function of the position of the bar magnet. Take the current to be positive when it is counterclockwise as viewed from the left. (FIGURE CANNOT COPY)
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD