Mastering Physics Solutions: Exercise 20.30

Mastering Physics Solutions: Exercise 20.30

On May 25, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = 20 V Click to use the calculator/solver for this part of the problem
Part B = 4200 turns Click to use the calculator/solver for this part of the problem
Part C = 1.6 A Click to use the calculator/solver for this part of the problem

The primary coil of an ideal transformer is connected to a 120-V source and draws 1.0 A. The secondary coil has 700 turns and supplies an output current of 6.0 A to run an electrical device.
What is the voltage across the secondary coil?
How many turns are in the primary coil?
If the maximum power allowed by the device (before it is destroyed) is 290 W, what is the maximum input current to this transformer?

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Mastering Physics Solutions: Secondary Voltage and Current in a Transformer Ranking Task

Mastering Physics Solutions: Secondary Voltage and Current in a Transformer Ranking Task

On May 15, 2012, in Chapter 20: Electromagnetic Induction and Waves, by Mastering Physics Solutions

Part A = Transformers 1, 2, and 3 have more primary than secondary turns, so they are step down transformers. Transformers 4 and 5 have more secondary turns so are step up transformers.
Part B = From greatest to least: 4 = 5; 2 = 3; 1 Click to use the calculator/solver for this part of the problem
Part C = From greatest to least: 1 = 2 = 3; 4; 5 Click to use the calculator/solver for this part of the problem

Six transformers have the rms primary voltages (Vp), number of primary turns (Np), and number of secondary turns (Ns) listed below.
Which of the transformers are step-up transformers? Which of the transformers are step-down transformers?
Rank the transformers on the basis of their rms secondary voltage.
100 A of rms current is incident on the primary side of each transformer. Rank the transformers on the basis of their rms secondary current.

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