Multiple Choice
A rod lies across frictionless rails in a uniform magnetic field B, as shown.The rod moves to the right with speed v.In order for the emf around the circuit to be zero, the magnitude of the magnetic field should: 
A) not change
B) increase linearly with time
C) decrease linearly with time
D) increase quadratically with time
E) decrease quadratically with time
Correct Answer:
Verified
Correct Answer:
Verified
Q68: An 8.0-mH inductor and a 2.0-
Q69: A circular loop of wire is positioned
Q70: The quantity (B<sup>2</sup>/ <span class="ql-formula" data-value="\mu"><span
Q71: An inductor with inductance L and an
Q72: The emf that appears in Faraday's law
Q74: 1 weber is the same as:<br>A)1 V/s<br>B)1
Q75: The circuit shown is in a uniform
Q76: A vertical bar magnet is dropped through
Q77: The units of motional emf are:<br>A)volt/second<br>B)volt.meter/second<br>C)volt/tesla<br>D)tesla/second<br>E)tesla.meter<sup>2</sup>/second
Q78: A 3.5 mH inductor and a 4.5