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4vir4ik [10]
3 years ago
12

A resistor uses 100 w of power when connected to 120 v emf. What is the current through the same resistor when connected to a 22

0 v emf?
Physics
1 answer:
cricket20 [7]3 years ago
6 0

Answer:

Explanation:

Let the resistance of resistor be R .

Power of resistor  V² / R , where V is potential applied .

V² / R = 100

120² / R = 100

R = 120² / 100

= 144 ohm .

Now potential diff applied = 220 V

current = potential diff / resistance

= 220 / 144

= 1.53 A approx .

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