Question

Which of the following terms does not represented eletrical power in a circuit?​

Answer 1

Answer:

P=VI.............(i)

Hence, option (c) represents power.

V=IR.............(ii)

From (i) and (ii),

P=I  

2

R

P=V  

2

/R

Hence, option (a) and (d )represents power too.

Option (b) does not represent power.

Explanation:

Answer 2

The formula for electric power

P = VI……………………..(1)

Where

P = Electric power

V = Potential difference in the circuit

I = Electric current.

From ohms law

V = IR……………………….(2)

Substitute equation (2) in (1) we get

P = (IR)I

P = I2R……………………….(3)

From ohm’s law

I = V/R…………………………(4)

Substituting equation (4) in equation (1), we get

P = V2/R..……………………(5)

The equation (1), (3) and (5) represents the electric power, whereas IR2 does not represent the electric power.

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