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.
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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.
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