An electric lamp is marked 100w 220v. What do you
understand by this? what current is taken by the lamp when it is connected to a 220v main supply. What is the resistance
of the lamp.​

Respuesta :

Answer:

The current is "[tex]\frac{5}{11} \ A[/tex]" and resistance is "484 ohm".

Explanation:

The given values are:

Potential difference,

V = 220 v

Power,

P = 100 w

Now,

The current will be:

⇒  [tex]P=VI[/tex]

On putting the values, we get

⇒ [tex]100=220\times I[/tex]

⇒     [tex]I=\frac{100}{220}[/tex]

⇒        [tex]= \frac{5}{11}[/tex] A

then,

Resistance will be:

⇒  [tex]V=IR[/tex]

⇒  [tex]220=\frac{5}{11}\times R[/tex]

⇒     [tex]R=44\times 11[/tex]

⇒         [tex]=484[/tex] ohm