Question

the hot resistance of a 250 volt filament lamp is 625 determine the current taken by the lamp and its power rating​

Answer 1

v=250v

R=625ohm

I=?

I=V/R

I=250/625

I=2/5

I=0.4A

we know that,

P=VI

P=250×0.4

P=100watt

Answer 2

The current and power rating is 0.4 A and 100 W

Given - Volt and resistance

Find - Current

Solution - The current will be calculated using ohm's law. The formula is as follows-

V = I × R, where v is voltage, I is current and R is resistance.

Keep the values in formula to find the value of current taken by the lamp.

I = $\frac{250}{625}$

I = 0.4 Ampere

Now, the power rating can be calculated as per the known information by the formula -

P = V × I, P refers to power.

Keep the values in formula to calculate power.

P = 250 × 0.4

P = 100 W

Hence, the current and power are 0.4 A and 100 W.

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