If the conductor, resistance is 50 ohm and the current passing through it is 5A. What is the value of potential difference?
Correct answer: B. 250V
- A. 150V
- B. 250V
- C. 50V
- D. 15V
Explanation
The potential difference across a conductor is given by Ohm's Law V = IR where V is the potential difference, I is the current, and R is the resistance. Substituting the given values, we get: V = IR = 5A x 50 ohm = 250V
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
_ potential difference is required for establishing steady current?
A 200 watt bulb operates in a 220V circuit. Find the current.
4000 Coulomb charges were passing from the wire for about 12 seconds. Estimate the current during this process.
The resistivity of a wire is _ ohm-m if 0.75 A current flows through it by applying 1.5 V potential difference, take length and cross-sectional area as 5m and 2.5 x 10^-7 m^2.
In a parallel circuit, the voltage remains the _.
If a certain piece of copper is to be shaped into a conductor of minimum resistance, it is length (L) and cross-sectional area (a) shall respectively be :