The resistance of a cell is 4.2 ohm at 100° C and the temperature coefficient of resistance of its material is 0.004/∘C. Its resistance at 0∘C is:
Correct answer: C. 3 ohm
- A. 6.5 ohm
- B. 5 ohm
- C. 3 ohm
- D. 4 ohm
Explanation
The explanation for this question is as follows:
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
A 50 Ampere-hour battery can supply a current of 50 A for 1 hour, 25 A for 2 hour, and so on. Then the total energy stored in the 12V-50 Ampere-hour battery is:
If four different resistors are used to pass electric current for different time durations, then which of the following will produce the largest heating effect in joules?
If a wire is molded in the form of a ring of radius r which encloses a charge q, then the strength of the electric field at the center of the ring will be:
SI unit of resistivity is:
A typical value of drift velocity is:
5 A of current is passed through a metallic conductor. The charge flowing in one minute in coulomb will be: