In Figure A, a loop of wire is laying flat in the plane of the screen in a magne

ID: 1875132 • Letter: I

Question

In Figure A, a loop of wire is laying flat in the plane of the screen in a magnetic field as shown. In Figure B, a loop of wire is laying flat in the plane of the screen to the side of an infinitely long wire. In each situation, decide whether or not there is an induced emf in the appropriate loop during the action described. 'emf means there was a non-zero induced emf. 'No emf means there was no induced emf in the coil Loop DFigA Wire Fig B In Figure B the current through the wire is kept constant at 3A to the right while the loop is moved towards the bottom of the screen towards the wire. The loop in Figure A is moved towards the top of the page In Figure B the current in the wire starts at zero and is increased until 5A of current flows towards the right of the page while the loop is held stationary. In Figure B the current through the wire is kept constant at 3A to the right while the loop is moved to the left parallel to the wire The loop in Figure A is moved towards the right side of the page.

Explanation / Answer

1) emf (since there is increse in magnetic flux through the loop)

2) no emf (since there is no change in magnetic flux through the loop)

3) emf (since there is increse in magnetic flux through the loop)

4) no emf (since there is no change in magnetic flux through the loop)

5) no emf (since there is no change in magnetic flux through the loop)

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In Figure A, a loop of wire is laying flat in the plane of the screen in a magne

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