4.3.3. Action and use of circuit components
A subsection of Physics, 0625, through 4. Electricity and magnetism
Listing 10 of 137 questions
shows a simple circuit. A 6 V reading 50 mA R What is the value of the e.m.f. of the battery, the current in the circuit? Calculate the resistance R of the resistor. R = State how the circuit could be changed to halve the current in the circuit, reduce the current to zero. A student wishes to include a switch in the circuit, but mistakenly connects it as shown in . A 6 V student’s incorrect connection R Comment on the size of the current in the circuit if the student closes the switch. What effect would this current have on the circuit?
0625_s09_qp_2
THEORY
2009
Paper 2, Variant 0
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The circuit in contains a 4.0 V battery, whose resistance can be ignored. There are also three resistors, a 3-position switch, S, and another component, P. S A C P B 22  2  8  4.0 V State the name of component P. Deduce the resistance of the circuit when switch S is connected to point A, resistance = point B. resistance = State the current in component P when S is in position C, and explain your answer. current = explanation The 22  resistor is removed as shown in . S A C P B 2  8  4.0 V Showing your working, decide which switch position will result in energy release from the circuit at the rate of 2.0 W. switch position =
0625_s10_qp_32
THEORY
2010
Paper 3, Variant 2
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The circuit in contains a 4.0 V battery, whose resistance can be ignored. There are also three resistors, a 3-position switch, S, and another component, P. S A C P B 22  2  8  4.0 V State the name of component P. Deduce the resistance of the circuit when switch S is connected to point A, resistance = point B. resistance = State the current in component P when S is in position C, and explain your answer. current = explanation The 22  resistor is removed as shown in . S A C P B 2  8  4.0 V Showing your working, decide which switch position will result in energy release from the circuit at the rate of 2.0 W. switch position =
0625_s10_qp_33
THEORY
2010
Paper 3, Variant 3
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Questions Discovered
137