Question

Calculate the resistance of the filament in a 40W ,240W.
a).1220 Ohm
b).1440Ohm
c). 1200Ohm
d).1000Ohm​

Answer 1

Answer:

Answer:

Given:

Voltage Rating = V = 240 Volts

Power (P)= 40 Watts

To Find:

Resistance (R)

Solution:

We know that,

\boxed{\rm P = V \times I}

P=V×I

Therefore,

\rm \implies I = \dfrac{P}{V}⟹I=

V

P

\rm \implies I = \dfrac{40}{240}⟹I=

240

40

\rm \implies I = 0.167 \;A⟹I=0.167A

Here we need to to find the Resistance (R)

\boxed{\rm R = \dfrac{V}{I} }

R=

I

V

\rm \implies R = \dfrac{V^2}{P}⟹R=

P

V

2

\rm \implies R = \dfrac{240^2}{40}⟹R=

40

240

2

\implies \rm R= 1440⟹R=1440 Ω

Correct answer is 1440 Ω

Answer 2

Answer:

Thank you for marking me as the brainliest

Explanation:

your answer is 14400hm(b)