Welcome to the Quiz!
This quiz contains 16 questions from a mix of 1 subtopics.
What is the electromotive force (emf) of a battery?
the energy consumed by the battery's internal resistance
the potential difference across the terminals
the power supplied by the battery
the energy provided per unit charge by the battery
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In a parallel combination of identical batteries, what remains the same for each battery?
internal resistance
current
electromotive force
terminal potential difference
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What is the relationship between electromotive force (E), current (I) and total resistance (R+r) of a battery?
E = I/R
E = I/r
E = I(R+r)
E = IR
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What happens to the lost volts across a battery's internal resistance when no current is flowing through the battery?
the relationship between lost volts and current flow is undefined
the lost volts remain the same
the lost volts decrease to zero
the lost volts increase
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What does the gradient of a plot of current against terminal potential represent for a battery?
electromotive force
external resistance
internal resistance
total resistance
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Which reading is taken with the switch open in the experimental investigation?
internal resistance
electromotive force
current
terminal potential difference
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If three identical batteries with emfs of 2 V each are connected in series, what is the total emf?
8 V
6 V
4 V
2 V
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What happens to the terminal potential difference of batteries connected in series as more batteries are added?
it decreases
it increases
it remains the same
the relationship is undefined
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What is the energy loss within a battery due to internal resistance called?
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Describe the setup for an investigation into a battery's internal resistance.
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Why does the terminal potential differ from the emf in practice? Explain.
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A cell has an electromotive force (EMF) of 12 V and an internal resistance of 0.5 Ω. When a load of 23.5 Ω is connected across it, what is the current flowing through the circuit?
0.4 A
0.5 A
0.3 A
0.2 A
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What is the total EMF of three cells, each with an EMF of 2 V, when connected in series?
6 V
8 V
4 V
2 V
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If the terminal potential difference across a cell is 9 V when the current flowing through it is 1.5 A, and the internal resistance of the cell is 0.5 Ω, what is the EMF of the cell?
9.25 V
9.75 V
9.5 V
10 V
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Four cells, each with an EMF of 1.5 V and internal resistance of 1 Ω, are connected in parallel. What is the total internal resistance of the circuit?
0.25 Ω
1 Ω
0.5 Ω
4 Ω
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A circuit consists of a cell with an EMF of 6 V and an internal resistance of 2 Ω, connected to a resistor of 4 Ω. What is the lost volts in the cell?
1 V
4 V
2 V
3 V
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