A plug-in transformer supplies 10 V to a video game system. (a) How many turns are in its secondary coil, if its input voltage is 116 V and the primary coil has 480 turns? (b) What is its input current when its output is 1.4 A?

A transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected to a 18-V source. (a) What is the voltage output of the secondary? V(b) If 3 A flows in the primary coil, how much current is there in the secondary coil? A

A generator produces 21.0 V when turning at 890 rev/min. What emf does it produce when turning at 530 rev/min? V

A plug-in transformer supplies 9.00 V to a video game system. (a) How many turns are in its secondary coil if its input voltage is 120 V and the primary coil has 423 turns?                turns(b) What is its input current when its output is 1.33 A?                  A

How many turns of wire would be required to make a 150 mH inductance out of a 20.0 cm-long air-filled coil with a diameter of 4.8 cm?

A typical wall outlet voltage in the United States is 120 volts. Personal MP3 players require much smaller voltages, typically 302.1 mV. If the number of turns in the primary coil is 35753575, calculate the number of turns NS on the secondary coil of the adapter transformer.

Question in the images

A transformer outside of a business steps the average voltage down from 3600 V to 120 V. The transformer delivers 1.50 × 106 W to the business at 82.0% efficiency. (Give answers to 3 sig.figs.) Find …     (a) the power delivered to the primary, (b) the current in the primary, and (c) the current in the secondary.