Question

10. A torch bulb is rated 10 V and 1000 mA. Calculate (i) its power, (ii) its
resistance and (iii) the energy consumed if this bulb is lighted for four hours.​

Answer 1

Answer:

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Answer 2

Answer:

1. 10 watt

2. 10 ohm

3. 144000 Joules/sec

Step-by-step explanation:

1. Power = V × I

P = 10 × 1

P = 10 Watt

2. V = 10v

I = 1000 mA = 1000 × 10^-3

R = V/I

R = 10 ÷ 1

R = 10 ohm

3. Energy = Power × time

4 hours = 4 × 60 ×60

Energy = 10 × 4× 60 × 60

Energy = 144000 Joules/sec.

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