# 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 current) at an output voltage of 5.8 V (rms).
(a) Should the transformer have more turns in the secondary compared to the primary, or fewer turns?
There should be more turns in the secondary.
There should be fewer turns in the secondary.

(b) Find the current in the primary.

mA

(c) Find the number of turns in the secondary.

turns

1. 👍 0
2. 👎 0
3. 👁 332
1. a. Fewer turns on secondary.

b. Ip = (5.8V/120V) * 500ma =

c. Turns = (5.8V/120V) * 414 =

1. 👍 0
2. 👎 0
2. post

1. 👍 0
2. 👎 0
3. thank you so much!

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physics

The generator at a power plant produces AC at 24,000 V. A transformer steps this up to 345,000 V for transmission over power lines. If there are 2,000 turns of wire in the input coil of the transformer, how many turns must there

asked by Mateo on April 28, 2011
2. ### 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
3. ### Physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the

asked by Nick on February 23, 2016
4. ### Circuits 2

a circuit with an ideal transformer with a source voltage, Vs=10cos(ωt)V, N1:N2=1:4, and RL=50Ω. What is the magnitude of the current on the primary side of the transformer?

asked by student on April 10, 2018
5. ### physics

The disk shaped head of a pin is 1.0 mm in diameter. Which of the following is the best estimate of the number of atoms in the layer of atoms on the top of the surface of the pinhead? 1. 10 to the 34th power 2. 10 to the 19th

asked by Kailey on August 26, 2010
1. ### algebra

A computer repair shop has estimated the probability that a computer sent to the shop has a bad modem is 1/8, the probability that the computer has a bad CPU is 1/5, and the probability that it has a bad drive is 1/3. If we assume

asked by Eliza on July 7, 2013
2. ### science

At a murder scene, you have started making an image of a computer’s drive. You’re in the back bedroom of the house, and a small fire has started in the kitchen. If the fire can’t be extinguished, you have only a few minutes

asked by Terry on July 16, 2014
3. ### Office Finances

Your computer's hard drive has crashed and all data has been lost. To safeguard against data loss, you should have a.kept a tape backup, b. used a password on all confidential files c. stored your data frequently while working, d.

asked by anna on November 5, 2009
4. ### physics

A force of 100 N is applied tangentially to a disk of radius 10 cm and mass 0.5 kg. the disk is initially at rest. What is the angular acceleration of the disk? How many revolutions does the disk goes through after 10 sec. How

asked by Maa on December 4, 2010
5. ### physics

A generating station is producing 1.2 x 106 W of power that is to be sent to a small town located 4.2 km away. Each of the two wires that comprise the transmission line has a resistance per length of 5.0 x 10-2/km. (a) Find the

asked by shaknocka lewis on October 20, 2011
6. ### Chemistry

The input voltage from a generating plant to a transformer is 11,000 V. If the output voltage from the transformer to high-voltage transmission lines is 240,000 V, what is the ratio of secondary to primary turns in this step-up

asked by Austin on May 16, 2019