Question

An electric bulb is rated '200 V ,100 W'.How much current will the bulb draw if connected to a 250 V supply?​

Answer 1

Answer:

The electric power in watts associated with a complete electric circuit or a circuit component represents the rate at which energy is converted from the electrical energy of the moving charges to some other form, e.g., heat, mechanical energy, or energy stored in electric fields or magnetic fields.That is, P=VI where, Pe is the power in watts, V is the voltage in volts and I is the current in amperes.

Therefore, if the power is 100 W and the supply voltage is 250 V, then the 

current is I=IP=250V100W=0.4A.

Hence, the amount of current the bulb will draw is 0.4 amperes.

Answer 2

$\huge \sf {\orange{\underline {\blue {\underline {A᭄ɴsᴡᴇʀ࿐ \ :- }}}}}$

It Conveys,

An electric bulb rating is 100Watts, which means it will consume 100W power and with this parameter you can easily calculate the power consumed by the bulb per hour or per week or per month or per year.

for an example,

I’m going to say this bulb is glowing for four hour, here i want to know how many units consumed by this bulb for four hours?

The calculation is,

100W x 4H = 400WH,

1 unit is equal to 1000W or 1KWH.

400/1000 = 0.4 unit.

The 250V Indicates the operating voltage of the electric bulb and its a single phase.