Question

A resistor R = 475 Ohm and an inductor of L = 1.4 H are used in and RL circuit to control the timing of some device. What time constant does this device exhibit?

Question options:

	2.9 ms
	67 ms
	39 ms
	29 ms
	none of these

Question

A long wire carries a steady current of I = 5.5 A. What is the strength of the magnetic field 5.5 cm away from the wire?

Question options:

	5.5 x 10^-7 T
	2.0 x 10^-6 T
	none of these
	2.0 x 10^-5 T
	5.5 x 10^-5 T

Question

An ideal step up transformer changes 12.5 V in the primary to 118 V in the secondary. How much current is in the secondary if there is 0.475 A in the primary?

Question options:

	0.503 A
	0.0503 A
	none of these
	5.03 A
	50.3 A

Question

A 400. turn solenoid, 24 cm long, has a diameter 2.2 cm. A 12-turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases by 3.5 A/s, what will be the induced emf in the short coil?

Question options:

	0.33 micro V
	33 micro volts
	3.3x10^2 micro V
	none of these
	3.3 micro volts

Answer 1