How much potential difference is required for establishing steady current?
Correct answer: B. Constant
- A. Minimum
- B. Constant
- C. Maximum
- D. Varying
Explanation
The potential difference, also known as voltage, is the driving force that pushes the charges to flow in the circuit. In a steady current, the flow of charges in the circuit is constant, and therefore, the potential difference across the circuit must also be constant. If the potential difference varies, the current in the circuit will also vary, which means it will not be a steady current. Therefore, the correct answer is (B) Constant.
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
The length and radius of an electric resistance of a certain wire are doubled simultaneously, then the:
Ohm's law is applicable to _.
EMF becomes equal to the terminal potential difference when the:
The resistivity of a wire is _ohm-m if 0.75 A current flows through it by applying a 1.5 V potential difference. Take length and cross-section as 5m and 2.5 x 10^-7 m2.
An immersion heater of 400 watts kept on for 5 hours will consume the electrical power of?
Our system stability is least affected by: