A torch bulb is rated 3v and 600 ma. Calculate its resistance if it is lighted for 4 hours.
Answers
Answered by
9
Potential difference (V) = 3V
Current (I) = 600mA = 600 / 1000 = 0.6A
Time (t) = 4 hrs = 4(60 x 60)s = 14400seconds
1) Power (P) = VI
P = 3 * 0.6
P = 1.8W
2) Resistance (R) = V / I [ By Ohm's Law]
R = 3 / 0.6
R = 30 / 6
R = 5
3) Energy = P * t
Energy = 1.8 * 14400
Energy = 25920 J
HOPE THIS HELPS YOU!!
Answered by
1
Answer:
answer is as follows.....
Explanation:
the resistance is same for whatever the time the lamp is being used i.e. calculated by using ohms law
R = V/I = 3/0.6 = 5 ohm
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