Question

for what value of E power across 4ohm will be 100w​

Answer 1

Answer:

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Explanation:

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Answer 2

Concept:

Power is the amount of energy transfered in per unit time and can be find out by dividing the square of potential difference with resistance.

Given:

Resistance given is 10 ohm

Power should be 100 watt

Potential difference across the resistor 4 ohm is E.

Find:

Value of E for which power across

Solution:

Applying the formula

Power = (Potential Difference)² / Resistance

(Potential Difference)² = Power × Resistance

Potential Difference = √(Power × Resistance)

We have given Power as 100 watt and value of resistance as 4 ohm

Putting the values in formula

Potential Difference = √(Power × Resistance)

Potential Difference = √(100 × 4) Volt

Potential Difference = √400 Volt

Potential Difference = 20 Volt

Hence power will be 100 watt for the value of E as 20 Volt.

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