Author Question: The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ... (Read 140 times)

melly21297 · **on:** Jul 29, 2018

The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied to the primary coil is 120 V, what voltage is present in its secondary coil?

A) 100 V
B) 30 V
C) 70 V
D) 480 V
E) 400 V

Question 2

A square is 1.0 m on a side. Point charges of +4.0 C are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 C and -3.0 C.

What is the potential (relative to infinity) at the midpoint of the square? (k = 1/40 = 9.0 109 N m2/C2 ) A) 1.0 104 V
B) 1.0 105 V
C) 1.0 106 V
D) 0 V
E) infinite