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A torch bulb is rated 2.5 V and 750 tHNCalculate its : (i) Power (i) Resistange (ii) the energy consumed if thebulb is lighted for 4 hrs.? |
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Answer» Given :V=2.5 VI=750mA= 750x10^-3 Apower =? Power = V*I =2.5x750x10^-3=1.875W Resistance :V=IRR=V/I=2.5/750x10^- 3 = 3.3 ohms Energy consumed if bulb is lighted for 4 hours :E=P*T=1.875x4=7.500Wh=27x 10^3 joules |
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