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4.2 Electrical quantities

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Question 155

A constant potential difference V V\,V is applied across a resistor of resistance RRR.

Which other physical quantity is needed to be able to determine the total charge Q Q\,Q that flows through the resistor?

A

the current III in the resistor

B

the electromotive force (e.m.f.) EEE of the power supply

C

the power PPP dissipated by the resistor

D

the time ttt for which the potential difference is applied

Markscheme

4.2 Electrical quantities Questions

  1. IGCSE
  2. /Physics
  3. /4.2 Electrical quantities

452 exam-style questions on CIE IGCSE Physics 4.2 Electrical quantities, covering 4.2.1a Positive and negative charge, 4.2.1b Charging by friction and detecting charge, 4.2.1c Electrical conductors and insulators, 4.2.1d Electric fields and electric field patterns, 4.2.2a Electric current, charge and measuring current, 4.2.2b Conduction in metals and the direction of current, 4.2.2c Direct current and alternating current, 4.2.3a Electromotive force, 4.2.3b Potential difference and voltmeters, 4.2.4a Resistance, 4.2.4b Resistance of a metallic wire, 4.2.4c Current–voltage graphs, and 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.

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