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Question: pfw blackboard.com/bbswebdaw/pid-1583483-dt-content-rid-9750270 1course/005420 onetic Waves. iptw blackboard.com ·을。Snach. Problem 10 (a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 500 turns, its secondary 4 turns, and the input voltage is 120 V? (b) What input current is required to produce a 4.00 A output? (c) What is the power input? F4 F5 F6 F7 F8 F9 F10 11 Psk–Free Chegg Question Answer

Transcribed text From Image: pfw blackboard.com/bbswebdaw/pid-1583483-dt-content-rid-9750270 1course/005420 onetic Waves. iptw blackboard.com ·을。Snach. Problem 10 (a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 500 turns, its secondary 4 turns, and the input voltage is 120 V? (b) What input current is required to produce a 4.00 A output? (c) What is the power input? F4 F5 F6 F7 F8 F9 F10 11 Psk

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Answer:

Answer

a) The voltage transformation equation is

\frac{E_2}{E_1}=\frac{N_2}{N_1}

where E2, E1 are the output and input voltages respectively. N2, N1 are secondary and primary turns respectively

Hence the output voltage is

E_2=E_1\frac{N_2}{N_1}=120\times 4/500=24/25=0.96\,\,V

b) The power output is

P=E_2 I_2=0.96\times 4=3.84\,\,W

Since the power is conserved

Input current is

I_1=P/E_1=3.84/120=0.032\,\,A

c) The power input is

P = 3.84 W


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