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THE P.d across a lamp is …

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THE P.d across a lamp is 12 volt. How many joules of electric energy are change into beat and light whe (a). a change of 1 colombe passes though it (b). a charge of 5 colombe passes though it (c). a current of 2 A flows though it of 10 second

Posted by Yogendra Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 5 years, 6 months ago

1. V = W/Q
12 = W/1
12 = W
Work done = 12 joules

2. V = W/Q
12 = W/5
12 x 5 = W
60 = W
word done = 60 joules

3. I= Q/t
2 = Q/10
Q = 10 x 2
Q = 20 coulombs
V = W/Q
12 = W/20
20 x 12 = W
W = 240 joules

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CBSE > Class 10 > Science