Electrical Engineering Answers

A bar magnet falls through a circular loop .

(a) describe qualitatively the change in magnetic flux through the loop when the bar magnet is above and below the loop.

(a) make a qualitative sketch of the graph of induced current in the loop as a function of time, choosing current to be positive when it's direction is counterclockwise a s viewed from above

A Spherical conducting shell is placed in a time varying magnetic field,is there an electric field along the equator?

Two circular loops And B have their planes parallel to each other,loop A has a current moving on the counterclockwise direction viewed from above.

(a)if the current in the loop A decrease with time,what is the direction of the induced current in the loop B.will the two loops attract or repel each other?

(b)if the current in loop A increases with time,what is the direction of induced current in loop B?,will the two loops attract or repel each other?

At what temperature the saturation current will be the twice of the diode current when the contact potential

At what temperature the saturation current will be the twice of the diode current when the contact potential of the diode is x V. Assuming the diode is made by silicon material.

Two circular loops A and B have their planes parallel to each other.

Loop A has a current moving in the counter clockwise direction, viewed from above.

1. If the current in loop A decreases with time, what is the direction of the induced current in loop B? Will the two loops attract or repel each other?

2. If the current in loop A increases with time, What is the direction of the induced current in loop B? Will the two loops attract or repel each other?

A spherical conducting shell is placed in a time-varying magnetic field. Is there an induced current along the equator?

A spherical conducting shell is placed in a time-varying magnetic field. Is there an induced current along the equator?

Define DC and AC resistance of a diode. Find the DC and AC resistance at

15 μA.