# Physics

A step-up transformer used on a 120 V line has 95 turns on the primary and 2850 turns on the secondary. What is the emf across the secondary?

A. 30 V
B. 1800 V
C. 2400 V
D. 3600 V

1. 👍 0
2. 👎 0
3. 👁 31
1. 120 * (2850 / 95)

1. 👍 0
2. 👎 0
posted by R_scott

## Similar Questions

1. ### Physics- Help!!

A step-up transformer is used on a 100 V line to increase the potential difference to 1200 V. If the primary has 120 turns, then what is the number of turns in the secondary coil? 1440 turns 1000 turns 100 turns 10 turns

asked by Ellie on June 9, 2016
2. ### Physics

Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume your house is the only one using electric power. At a substation the primary of a

asked by Busker on October 22, 2012
3. ### Physics

Which of the following is correct for a step-down transformer? Number of turns in the primary coil is less than the number of turns in the secondary coil. Step-down transformer increases the voltage from low value to high value.

asked by Liam on October 22, 2012
4. ### physics

is this done correctly? A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the rms emf across the secondary coil is 120 V, what is the maximum emf across the primary coil? Np=16000 Ns=95 turns

asked by physics on March 13, 2009
5. ### Physics

A transformer is to be used to provide power for a computer disk drive that needs 5.8 V (rms) instead of the 120 V (rms) from the wall outlet. The number of turns in the primary is 414, and it delivers 500 mA (the secondary

asked by ricky on March 22, 2018
6. ### Sciece

The primary of a step-down transformer connected to a 240 V source has 1000 turns. The secondary has 100 turns. What is the output voltage of this transformer?

asked by Jayla on November 5, 2012
7. ### Physics

The primary of a step-down transformer connected to a 240 V source has 1000 turns. The secondary has 100 turns. What is the output voltage of this transformer?

asked by Natalie on March 17, 2013
8. ### physics

A step-down transformer has a turns ratio of 1:10 and its primary is connected across the terminals of a standard 120 V wall socket. A 330 ohm resistor is connected across the secondary of this transformer. What power P is

asked by josh on July 28, 2010
9. ### Physics - Help!!!

I am having trouble understanding transformers!! Here is the problem I have to solve: A protable CD player requires 12 volts to operate. A transformer allows the device to be powered from a 120-volt outlet. If the primary has 500

asked by Justin on May 29, 2012
10. ### physics

please tell me if this is correct, A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the rms emf across the secondary coil is 120 V, what is the maximum emf across the primary coil? is the

asked by physics on March 17, 2009
11. ### science

A step-up transformer has 120 turns on its primary coil. It has 1150 turns on its secondary coil. The primary circuit is supplied with an alternating current at 120 V. The current in the secondary circuit is 2.4 A. What current is

asked by martin on April 3, 2008

More Similar Questions