An electric lamp is marked 20w 220v it is used for 10 hours daily. calculate its resistance while glowing
Answers
Answered by
2
P=w /t
w = 200 joule
P= VI
I= 1/11 A
w= I² R t
R = w / I² t
R= 200 × 121 / 10
R = 2420 ohm
w = 200 joule
P= VI
I= 1/11 A
w= I² R t
R = w / I² t
R= 200 × 121 / 10
R = 2420 ohm
Answered by
3
Hey there !!
Power = P = 20 W
Voltage = V = 220 v
Resistance = R
we know that ,
P = V²÷ R
20 = 220² ÷ R
20 = 48400 ÷ R
R = 48400/20
R = 2420 Ω
Hope this Helps You !!
Power = P = 20 W
Voltage = V = 220 v
Resistance = R
we know that ,
P = V²÷ R
20 = 220² ÷ R
20 = 48400 ÷ R
R = 48400/20
R = 2420 Ω
Hope this Helps You !!
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