An electric bulb is connected to a 220v generator the current is 0.50A. What is the power of the bulb?

Answer:

Power is defined as the rate at which work is done upon an object. Power is a time-based quantity. Which is related to how fast a job is done. The SI unit of power is Watt (W) which is joules per second (J/s). The formula for power is mentioned below.

Power = Work / time

P = W / t

The voltage and current of a bulb are given, the power is calculated through the derived formula of Power.

Given as

  • Voltage (V) = 220 V
  • Current (I) = 0.05 A

And we know that

Power = Voltage x Current

p = 220 x 0.05

p = 22 x 0.5

p = 110W

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  1. Why we need a 5 A fuse for an electric iron which consumes 1 kW power at 220 V?
  2. Two identical resistors, each of resistance 15 Ω, are connected in (i) series, and (ii) parallel, in turn to a battery of 6 V. Calculate the ratio of the power consumed in the combination of resistors in each case.

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