an electric glow lamp is rated 240 V 60w find in joules the heat produced when the lamp is switched on for 4 second. Plz answer
Answers
Answered by
0
Explanation:
Given :
power =p=100w
voltage=220V
time=2hrs
Resistance=R=?
Formula to be used :
P=V*I
BUT I=V/R
∴P=V²/R
⇒R=V²/P
=220x220/100
=484ohms
To calculate Energy consumed :
Formula : E=Pxt
=100x5
=500Wh
=500/1000 kWh
0.5 kWh
∴ Resistance while glowing is 484 ohms and energy consumed in kWh per day ps 0.5
Answered by
0
Answer:
P = VI.
60 = 220 x I,
I = 60 / 220,
I = 0.273A.
V = IR.
220 = 0.273 x R
R = 220 / 0.273
R = 805.86ohms
Similar questions