1. Transformers are used in many different electronic products, such as in printers, speakers, clock radios, and chargers for lap tops and cell phones. For example, the transformer in a cell phone charger steps the voltage down from the 120 V in the wall outlet to roughly 5 V for circuits in the phone. In all of these products, transformers transfer energy from one circuit to another via mutual induction.

Consider the circuit below that involves a transformer with a turn’s ratio of 10:1.

What kind of transformer is this?

		A. Step-down
	B.	Step-up
	C.	Regulated
	D.	AC
	E.	Load

2. What is the current in amps in the secondary coil of the transformer in Question 1 if R _load = 1000?

3. Explain how you got your answer to question 2.

4. A transformer is to be used to provide power for a computer drive. The number of turns in the primary is 1000, and it delivers a secondary current of 600 mill amperes (mA) at a secondary voltage of 8.0 V for the drive. A voltage of 400 volts is applied across the primary. What kind of transformer is this?

		A. AC
		B. Load
		C. Step-down
		D. Step-up
		E. Regulated

5. Determine the number of turns in the secondary of the transformer in Question 4.

6. Explain how you got the answer to Question 5.

7. Determine the primary current in milliamps of the transformer in Question 4.

8. Explain how you got the answer to Question 7.

9. A transformer is said to be ideal if the power developed across the primary equals the power developed across the secondary. Assuming the transformer used in Question 4 is ideal, find the power (P=IV) in watts developed across either the primary or secondary.

10. Explain how you got the answer to Question 9.

Answer rating: 100% (QA)

1 A Stepdown 2 Secondary 51000 5103 A 3 Using Ohms law 4 C St... View the full answer