एक ट्रांसफार्मर में, प्राथमिक धारा (primary current) 500 A है और द्वितीयक धारा (secondary current) 5 A है। घुमाव अनुपात (turns ratio) ज्ञात कीजिए, जिसे N1N2 के रूप में परिभाषित किया गया है।

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.