How many joules of electricity are changed into light and heat when a charge of 5c passes through a lamp when a current of 12V is passed through it
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Helo mate here your ans
p.d. = 12v
(a) p.d. = Work done/Charged moved
Work done = p.d. × Charge moved
= 12 × 1 = 12 J
Amount of electrical energy changed in to heat and light = 12J
(b) Work done = p. d. × charge moved
= 12 × 5 = 60J
Amount of electrical energy changed in to heat and light = 60J
(C) I = Q/t
Q = I × t
= 2 × 10 = 20c
Work done = p. d. × charge moved
= 12 × 20 = 240 J
Amount of electrical energy changed in to heat and light = 240J
hope this ans help you...........
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