In Figure A, a loop of wire is laying flat in the plane of the screen in a magne
ID: 1772917 • 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 Fig A Wire Fig B In Figure B the current in the wire starts at zero and is increased until 5A of current flows towards the left of the page while the loop is held stationary The loop in Figure A is moved towards the left side of the page In Figure B the current through the wire is kept constant at 3A to the right while the loop is In Figure B the current through the wire is kept constant at 3A to the right while the loop is The loop in Figure A is moved towards the top of the page moved towards the top of the screen away from the wire moved to the right parallel to the wire Submit Answer Tries 0/10Explanation / Answer
as the current in the wire in left is increased from 0 to 5 A , the magnetic flux linked with the wire around it change. hence the magnetic flux of loop changes and emf is induced
no emf induced : the loop is completly inside the magnetic field. so moving the loop to left does not change the magnetic flux through it and hence no emf is induced.
as the loop is moved away, , the magnetic flux linked with the loop change. hence emf is induced
as the loop is moved right, , the magnetic flux linked with the loop does not change change. hence emf is not induced
no emf induced : the loop is completly inside the magnetic field. so moving the loop to top does not change the magnetic flux through it and hence no emf is induced.
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