दो कुंडलियाँ (coils), जिनमें से प्रत्येक का स्व-प्रेरकत्व (self-inductance) 10 H है, इस प्रकार युग्मित हैं कि उनके बीच पारस्परिक प्रेरकत्व (mutual inductance) 4 H है। कुंडलियों के बीच युग्मन गुणांक (coefficient of coupling) ज्ञात कीजिए।

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.