Which of the following terms does not represent electrical power in a circuit?(a) I2R(b) IR2(c) VI(d) v22
Question
Which of the following terms does not represent electrical power in a circuit?
- (a) I²R
- (b) IR²
- (c) VI
- (d) v²/2
Solution
The term that does not represent electrical power in a circuit is (b) IR2.
Here's why:
Electrical power in a circuit can be calculated using several formulas, depending on what quantities you know:
-
P = VI, where P is power, V is voltage, and I is current. This is the most direct formula.
-
P = I^2 * R, where R is resistance. This is derived from Ohm's law (V = IR), substituting V in the power formula.
-
P = V^2 / R, again derived from Ohm's law, substituting I in the power formula.
As you can see, (a) I^2R, (c) VI, and (d) V^2/R all represent power. However, (b) IR^2 is not a formula for power in a circuit.
Similar Questions
Which of the following circuit element stores energy in the electromagnetic field ?(1 Point)InductanceCondenserVariable resistorResistance
The power dissipated in a conductor of resistivity ρ connected across a battery is directly proportional to Only one correct answerA.ρ2B.√ρρC.ρD.ρ–1
If i is current through the circuit and E is EMF of battery then power P at which chemical energy of battery is dissipated isa.P=E/i
Using Ohm’s law, state three expressions for the electrical power that is dissipated in a resistor
If i is current through the circuit and E is EMF of battery then power P at which chemical energy of battery is dissipated isa.P=iEb.P=E/ic.P=Ei^2d.P=i/E
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.