4.2.4. Resistance
A subsection of Physics, 0625, through 4. Electricity and magnetism
Listing 10 of 302 questions
shows a circuit. A X Y 12 V 2.0 m 6.0 Ω 2.0 Ω 3.0 Ω The lamp has a resistance of 3.0 Ω. Line XY represents a uniform resistance wire of resistance 6.0 Ω. Calculate the reading on the ammeter. ammeter reading = shows the circuit with a different connection to the resistance wire and an added resistor. The length XY of the whole resistance wire is 2.0 m. The contact is made at Q where the distance XQ is 0.60 m. A X Q Y 12 V 0.60 m 2.0 Ω 3.0 Ω 1.5 Ω 2.0 m Calculate the resistance of the circuit. resistance =
0625_m20_qp_42
THEORY
2020
Paper 4, Variant 2
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A student connects the circuit shown in . A LDR The student wants to determine the resistance of the light-dependent resistor (LDR). Draw on to show how the student connects a voltmeter into the circuit. Use the correct symbol for the voltmeter. The current in the LDR is 0.020 A when the potential difference across the LDR is 5.4 V. Calculate the resistance of the LDR. resistance of LDR = Ω When the student shines a light onto the LDR, its resistance is 150 Ω. The resistance of the variable resistor in the circuit is 180 Ω. Determine the combined resistance of the LDR and the variable resistor. combined resistance = Ω
0625_m22_qp_32
THEORY
2022
Paper 3, Variant 2
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Questions Discovered
302