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Anna35 [415]
3 years ago
13

What is the resistance of a bulb of 40w connected in a line of 70v​

Physics
1 answer:
olga55 [171]3 years ago
4 0

Answer:

122.5 ohm

Explanation:

Given :

P=40 w

V= 70 V

R=?

Resistance can be calculated as :

P=\frac{V^{2} }{R} \\40=\frac{(70)^{2} }{R}\\40=\frac{4900}{R} \\R=\frac{4900}{40} \\R=122.5 ohm

Therefore, resistance of the bulb will be 122.5 ohm

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