Question

two bulbs one is 300 w and other 600w are connected with similar source of 300 v the ratio resistance between them​

Answer 1

Answer:

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Explanation:

Answer 2

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Power depends on three factors :

• Voltage
• Current
• Resistance

Of these three, the first two are liable to change according to a given circuit, but the resistance of a device is fairly constant.

Let's take a 200 volts - 100 watts bulb and calculate the resistance of its filament :

We know,

P=V²/R

or,

R=V²/P

When V=200 volts and P = 100 watts,

R = (200*200)/100 = 400 ohms.

The reason why we calculated out the resistances is because R does not change with the applied voltage. It may be considered as a constant at a given temperature and pressure.