10 questionsð¬ð§English
ð Current, Voltage & Resistance â GCSE
Physics · GCSE â practise V = IR, series and parallel circuit rules and the behaviour of circuit components
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Questions
What is the unit of electrical resistance?
Ohm (Ω)
Coulomb (C)
Volt (V)
Ampere (A)
20s
A current of 2 A flows through a 6 Ω resistor. What is the potential difference across it?
8 V
12 V
3 V
0.33 V
20s
Two lamps are connected in parallel to a 6 V battery. What is the potential difference across each lamp?
3 V
2 V
6 V
12 V
20s
A current of 0.5 A flows through a wire for 2 minutes. How much charge flows?
1 C
30 C
60 C
120 C
30s
Resistors of 4 Ω, 6 Ω and 10 Ω are connected in series. What is the total resistance?
About 1.9 Ω
20 Ω
10 Ω
240 Ω
30s
The light shining on a light-dependent resistor (LDR) gets brighter. What happens to its resistance?
It increases, then decreases
It stays the same
It decreases
It increases
20s
What does the IâV graph for a diode show about how it conducts?
Current is equal in both directions
Current is directly proportional to p.d.
Resistance rises as it gets hotter
Current flows in one direction only
30s
A thermistor is in series with a fixed resistor and a battery. The room warms up. What happens to the current?
It decreases
It reverses direction
It increases
It stays the same
30s
Why is the IâV graph for a filament lamp a curve rather than a straight line?
Its resistance falls as more light hits it
It lets current flow in one direction only
Its resistance falls as the filament heats up
Its resistance rises as the filament heats up
30s
A 2 Ω and a 4 Ω resistor are connected in series to a 12 V supply. What is the potential difference across the 4 Ω resistor?
12 V
8 V
6 V
4 V
60s