150 cm2 क्षेत्रफल के एक आयताकार लूप में 2.8 mV का विद्युत वाहक बल (emf) प्रेरित होता है जब लूप में धारा 0.2 s के समय में 3 A से बदलकर 8 A हो जाती है। लूप का स्व-प्रेरकत्व (self-inductance) कितना होगा?

A rectangular wire loop of sides 8 cm and 3 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the plane of the loop. The emf developed across the cut, if the velocity of the loop is 2 cm s-1 in a direction normal to the shorter side of the loop, will be:

The mutual inductance between two coils is 2 H. If the current in one coil changes from 0 to 10 A in 0.5 s, find the magnitude of the induced EMF in the second coil.