For the accurate measurement of electric current passing through a circuit, the resistance of the ammetre should be
Correct answer: A. lesser than the circuit resistance
- A. lesser than the circuit resistance
- B. greater than the circuit resistance.
- C. equal or lesser than the circuit resistance
- D. equal or greater than the circuit resistance
Explanation
The correct answer is Option A: lesser than the circuit resistance. This is because the ammeter should have a lower resistance than the circuit to avoid affecting the current flow and provide an accurate measurement. Options B, C, and D are incorrect as having the ammeter resistance greater, equal, or higher than the circuit resistance would introduce inaccuracies in the current measurement.
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Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
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