Author Question: How much current must pass through a 400-turn ideal solenoid that is 4.0 cm long to generate a 1.0-T ... (Read 36 times)

lb_gilbert · **on:** Jul 29, 2018

How much current must pass through a 400-turn ideal solenoid that is 4.0 cm long to generate a 1.0-T magnetic field at the center? (0 = 4 10-7 T m/A)

A) 80 A B) 22 A C) 13 A D) 0.013 A E) 40 A

Question 2

A 400-W computer (including its monitor) is turned on for 8.0 hours per day. If electricity costs 10 per kWh, how much does it cost to run the computer annually for a 365-day year?

A) 120
B) 1200
C) 15
D) 150