A potential difference of 12 V is applied across a resistor of 4 Ω. Calculate the current flowing through it.
Current Electricity
Original Khojo Papers practice question — not from a past board paper.
ohm
No citable source has been recorded for this record. Treat it as practice material, not as fact.
One ohm is one volt per ampere.
From the same topic and chapter, at a similar level.
A potential difference of 12 V is applied across a resistor of 4 Ω. Calculate the current flowing through it.
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State Ohm's law and the conditions under which it holds.
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A potential difference of 12 V is applied across a resistor and a current of 0.4 A flows. Calculate the resistance of the resistor.
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Two resistors of 6 Ω each are connected in parallel. Calculate the equivalent resistance.
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Three resistors of 2 Ω, 3 Ω and 5 Ω are joined in series across a 20 V supply. Calculate the current in the circuit and the potential difference across the 3 Ω resistor.
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An electric bulb is marked 100 W, 220 V. Calculate the current it draws and its resistance in normal use.
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