Question

How should the student change the circuit to give negative values for current and potential difference?

Answer 1

Answer:

Please find the answer in the explanation.

Explanation:

How should the student change the circuit to give negative values for current and potential difference?

Positive and Negative current can be seen when charging and discharging a device or when powering a load.

Negative current can also be achieved when current is allowed to flow in other direction.

If the direction of the current is changed, the voltage will read negative. Changing of power or battery terminals can make voltmetre to read negative.

Answer 2

The student can reverse the direction of current flow in a circuit to obtain the negative values for current and potential difference in the circuit.

To determine the negative current flow and potential difference in a circuit, we can consider following ways;

• During charging, the current flows in a specific direction for which it is taken as positive. Then the voltmeter reading will be positive and potential difference is positive.
• During discharging, the direction of current is reversed for which current becomes negative and the voltmeter reading is also negative. Hence, the potential difference is negative.
• Changing battery terminals also reverses the direction, to produce negative current and potential difference.

Thus, the negative values of current and potential difference is obtained by reversing the direction of current flow in a circuit.

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