Question

A torch bulb is rated 5V and 500mA. Calculate its power.
1 point
(a) 25 W
(b) 0.25 W
(c) 2.5 W
(d) 250 W

Answer 1

Answer:

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Answer 2

Answer:

i) P  = V I = 5 × 0.5 = 2.5 watt 

ii) R = V / I = 5 / 0.5 10 Ω

iii) W = P × t = 2.5 × 4

Explanation:

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