Author Question: A solenoid of length 5.0 cm has a cross sectional area of 1.0 cm2 and has 300 uniformly spaced ... (Read 88 times)

cnetterville · **on:** Jul 29, 2018

A solenoid of length 5.0 cm has a cross sectional area of 1.0 cm2 and has 300 uniformly spaced turns. The solenoid is wrapped in 180 turns of insulated wire resulting in a mutual inductance of

A)

1.1 H.
B)

1.4 10-2 H.
C)

11 H.
D)

1.4 10-4 H.
E)

110 H.

Question 2

The monthly (30 days) electric bill included the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/day.

How much did these items contribute to the cost of the monthly electric bill if electricity costs 8.0 per kWh? A)

21.30
B)

39.50
C)

31.20
D)

13.20
E)

12.30