Question

Physics problems based on electromagnetism

Answer 1

Answer:

1 The primary of a transformer is connected to a source of voltage that has two components: an alternating current (AC) component of 120 volts and a steady direct current (DC) component of 5 volts. The number of turns of the primary is 300 and the that of the secondary is 6000. What is the voltage at the output of the secondary?

A) 2400 volts AC and 100 volts DC

B) 2400 volts AC only

C) 100 volts DC only

D) 2500 volts AC only

E) 2500 volts DC only

2 An electric motor transforms

A) mechanical energy into electrical energy

B) electrical energy into mechanical energy

C) Potential energy into electrical energy

D) A high voltage into a smaller voltage

E) A small voltage

into a higher voltage