Two coils are at fixed locations. when coil 1 has no current and the current in coil 2 increases at the rate 17.8 a/s, the emf in coil 1 is 27.1 mv. (a) what is their mutual inductance? (b) when coil 2 has no current and coil 1 has a current of 4.00 a, what is the flux linkage in coil 2?

Part a)

Part b)

Explanation:

Part a)

As we know by Faraday's law

so we will have

so we will have

Part b)

As we know by Lenz law

so we have

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27