In Europe, the standard voltage is 240 V (rms) ac, and 60 cycles/s. Suppose you

Question

In Europe, the standard voltage is 240 V (rms) ac, and 60 cycles/s. Suppose you take your 4.00-w electric razor to Rome and plug it into the receptacle (with an adapter to fit the receptacle but not to change the voltage). 1) What power will it draw in Rome? (Express your answer to two significant figures.) TW Submit 2) What mms current will run through the razor in the United States? (Express your answer to two significant figures.) A Submit 3) what rms current will run through the razor in Rome? (Express your answer to two significant figures.) A Submit 4) Is the razor in danger of being damaged by using it in Rome without a voltage adapter? most likely yes. most likely no Submit

Explanation / Answer

a) P = V2 / R

4 = 1202 / R

R = 3600 volts

In rome, V = 240 V

power = 2402 / 3600 = 16 W

b) In US, rms current = rms voltage / R = 120 / 3600 = 0.033 A

c) In rome, rms current = rms voltage / R = 240 / 3600 = 0.066 A

d) most likely yes

e) Np/Ns = Vr/Va = 240 / 120 = 2 (twice)

f) P = V2 / R

R = 1202 / 4 = 3600 ohms

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