Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is___________________?
Correct answer: B. I2R
- A. IR
- B. I2R
- C. IR2
- D. I2R2
Explanation
The electrical heating rate is given by Joule’s law, P = I²R, where current squared multiplied by resistance gives heat produced per unit time. Thus the applicable expression is I²R.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, 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 Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to _____________ the velocity head?
The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is - 5°C. The outside wall temperature is___________________?
Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_____________________?
Fourier's law applies to the heat transfer by__________________?
As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
When vaporisation takes place directly at the heating surface, it is called________________?