Exam 29: Electromagnetic Induction

The long straight wire in the figure has current I = 1 A flowing in it.A square loop which has 10-cm sides is positioned 10 cm away from the wire as shown.The loop is then moved in the positive x-direction with a speed v = 10 cm/s.If the loop has a resistance of 0.02 ohms,calculate the direction and the magnitude of the induced current in the loop the instant the loop is made to move.

A circular wire loop of diameter 5.0 cm rotates with period 150 ms about a horizontal axis while in a region having a 0.10 T magnetic field pointing in a horizontal plane at an angle of 35 degrees relative to the rotation axis.If the maximum current induced in the loop is 6.7 mA,what is the resistance of the loop?

An inductor of inductance L and a resistor of resistance R are connected in series and then at t = 0 the combination is connected across the terminals of a battery.When is the current flowing through the resistor equal to half its maximum value?

In the figure shown,the field is decreasing by 150 T/s.What is the magnitude of the current in amperes?

A 2.7-mH inductor is connected to a current.How much energy is stored in its magnetic field at time t = 3.0 s if the current is ? (Assume two significant digits for each number.)