Author Question: A generator produces 60 A of current at 120 V. The voltage is usually stepped up to 4500 V by a ... (Read 115 times)

kfurse · **on:** Jul 29, 2018

A generator produces 60 A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 .

Find the percentage power lost in the transmission line if the voltage is not stepped up. A)

0.018
B)

0.036
C)

5.0
D)

25
E)

50

Question 2

A charge q = 3 10-6 C of mass m = 2 10-6 kg, and speed v = 5 106 m/s enters a uniform magnetic field. The mass experiences an acceleration a = 3 104 m/s2.

What is the minimum magnetic field that would produce such an acceleration? A)

0.1 T
B)

0.004 T
C)

0.001 T
D)

0.01 T
E)

0.04 T