Electrical energy is converted to heat at the rate of _
Correct answer: C. l2R
- A. IRt
- B. I2Rt
- C. l2R
- D. Vlt
Explanation
The rate at which electrical energy is converted to heat is the power dissipated, P = I²R. (I²Rt is the total heat energy over time t, not the rate.)
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
Practise Current Electricity
1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Current Electricity questions
lnternal resistance is the resistance offered by _
A wire of resistance R is stretched four times its length uniformly. Its new resistance will be
A wire of resistance R is cut into two equal parts, its resistance becomes R/2, what hapens to resistivity:
The following four wires are made of the same material and wire and are at the same temperature. Which one of them has highest electrical resistance?
A cell of internal resistance 2.0Ω and electromotive force e.m.f 1.5V is connected to a resistor of resistance 3.0Ω. What is the potential difference across 3Ω resistor?
The resistance of a cell is 4.2 ohm at 100° C and the temperature coefficient of resistance of its material 0.004/.∘C.Its resistance at 0∘C is: