CAIE A-Level Physics AS 10.1.4 E M F and Potential Difference P D in Terms of Energy Considerations Questions
Distinguish e.m.f. from potential difference using energy-transfer definitions.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- Distinguish e.m.f. from potential difference using energy-transfer definitions.
CAIE A-Level Physics AS 10.1.4 E M F and Potential Difference P D in Terms of Energy Considerations Questions question 1
A battery of electromotive force (e.m.f.) E and internal resistance r is connected to a variable resistor of resistance R, as shown in Fig. 6.1.
Fig. 6.1
The current in the circuit is I and the potential difference across the variable resistor is V.
Explain, in terms of energy, why V is less than E.
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