Question

A 4 ohms resistor having 2 ampere current will dissipate the power of
a. 8 watts
b. 16 watts
c. 8 joule
d. 16 joule ​

Answer 1

Answer :

Resistance of resistor = 4Ω

Current flow in resistor = 2A

We have to find power dissipated by resistor$.$

Formula of power dissipated by resistor in terms of resistance and current is given by

• P = I² × R

፨ P denotes power

፨ I denotes current

፨ R denotes resistance

⇒ P = I² × R

⇒ P = (2)² × 4

⇒ P = 4 × 4

⇒ P = 16 watts

☃ God_Bless :)

Answer 2

Given ,

Resistance (r) = 4 ohm

Current (I) = 2 amp

We know that ,

The electric power in terms of current and resistance is given by

$\boxed{ \sf{P = {(I)}^{2} R}}$

Thus ,

P = (2)² × 4

P = 4 × 4

P = 16 watt

$\therefore$ The electric power is 16 watt