An electrical appliance has a rating 100 W, 120 V. the resistance of e – InterviewSolution

1.

An electrical appliance has a rating 100 W, 120 V. the resistance of element of appliance when in use is:(a) 1.2Ω (b) 144 Ω (c) 120 Ω (d) 100 Ω

Answer»

144Ω

Solution:

Given, power (p) = 100 w

Potential difference, v = 120 volt

∴ Resistance, r = (v)²/P = (120)²/100 = 144 Ω

Discussion

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