The voltage across a lamp is V =(6.0+_ 0.1) v and the current passing through it is ( 4+-0.2) A ? Find the power consumed?
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Answers
Answered by
335
Power = VI
P = 6*4 = 24 Watt
dP = P(dV/V + dI/I)
dP = 24*(0.1/6 + 0.2/4)
dP = 1.6
Power consumed = (24 ± 1.6) Watt
P = 6*4 = 24 Watt
dP = P(dV/V + dI/I)
dP = 24*(0.1/6 + 0.2/4)
dP = 1.6
Power consumed = (24 ± 1.6) Watt
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Answered by
169
The power consumed by the lamp is,
Solution:
Power consumed by lamp
Here, V is the original voltage and I is the original current.
So, as per the question, V= 6 V and I = 4 A.
Hence, power
In order to find the error, differentiate equation (1),
Now divide (2) by (1)
Substitute, in (3)
Thus, the power consumed by the lamp is,
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