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WorksheetsAQA GCSE PHYSICS - ELECTRICITY
Total questions: 43
Worksheet time: 22mins
Which of these options would give a total resistance of 10 Ω (ohms)?
A 2 ohm resistor and a 5 ohm resistor in series
A 2 ohm resistor and a 5 ohm resistor in parallel
Two 5 ohm resistors in series
Two 5 ohm resistors in parallel
What equipment do you need to measure the resistance of a component?
Choose from an ammeter, a voltmeter and a power supply.
Just an ammeter
Just a voltmeter
Just a power supply
All three
In what unit is charge measured?
Volts
Amps
Quarks
Coulombs
Look at this circuit.
What can you say about the total resistance of this combination of resistors?
This parallel arrangement has less resistance than either R1 or R2
This parallel arrangement has a resistance between that of R1 and R2
This parallel arrangement has more resistance than R1 or R2
This parallel arrangement has more resistance than R1 and R2 added together
What unit is used to measure voltage (or potential difference)?
Amps (A)
Volts (V)
Coulombs (C)
Joules (J)
How does an earth wire act as a safety feature?
It provides more current
It stops the appliance becoming live
It stops the appliance from being dropped
It slows the current if there is a fault
Which is the most common type of wasted energy in the home?
Kinetic
Gravitational
Thermal
Chemical
As a filament bulb gets brighter, what happens to its resistance?
The resistance decreases
The resistance stays the same
The resistance increases
The resistance becomes zero
When does the resistance of a light-dependent resistor increase?
When it gets darker
When it gets lighter
When it gets hotter
When it gets colder
How does friction cause static charge?
By removing positive electrons
By adding positive electrons
By transferring negative electrons
By a squeaky noise
Which of these factors does NOT affect the resistance of a wire?
The material the wire is made from
The length of the wire
The diameter of the wire
The shape of the wire
A car headlamp is rated as 12 V, 2 A.
What is its power rating?
12 W
14 W
24 W
122 W
The correct form of Ohm's Law, linking potential difference V, current I and resistance R is…
V = I × R
V = I + R
V = I/R
V = R/I
How can you describe a.c, or alternating current?
A current with the same strength and direction all the time
A current that varies in strength and swaps direction smoothly and regularly
A current that has the same strength but changes direction regularly
A current that changes strength regularly but always in the same direction
A current of 0.5 A flows for 2 minutes in a circuit.
The charge flow is…
1 C
2 C
60 C
120 C
What does this graph show?
Resistance and length of wire are proportional
Resistance and length of wire are directly proportional
Resistance and length of wire are inversely proportional
Resistance and length of wire are unrelated
Why is distributing the same power through the National Grid more efficient at a lower current?
Low voltages are safer
High currents heat up the cables, wasting energy
High currents get more electricity through to the consumer
High voltages are safer
Which statement describes a series circuit?
A single loop with the same current passing through all components
More than one loop with the same current passing through all components
A single loop with different currents passing through various components
More than one loop with different currents passing through various components
What colour is the neutral wire in a plug?
Blue
Brown
Yellow
Green & Yellow
A residual current device (RCD) switches off the electricity supply if…
the live and neutral currents are equal
the live current is greater than the neutral current
the live current is less than the neutral current
the live and neutral currents are zero
Which statement is true if you increase the resistance of a variable resistor?
A larger current flows through the resistor
The better the resistor conducts
The lower the current flows through the resistor
The easier it is for electrons to pass through the resistor
Which of the following pairs of objects would undergo repulsion?
A positively charged object next to a negatively charged object
A positively charged object next to a neutral object
A negatively charged object next to a neutral object
A negatively charged object next to a negatively charged object
What could a light-dependent resistor be used to control?
The temperature of a fridge
The temperature of the hot water in a water boiler
The blood flow
The timing for a streetlight
Which statement describes a parallel circuit?
A single loop with the same current passing through all components
More than one loop with the same current passing through all components
A single loop with different currents passing through each component
More than one loop with different currents passing through each loop
Which of these values is a power rating for a domestic lightbulb?
230 V
2000 W
0.5 A
11 W
What colour is the earth wire in a plug?
Blue
Brown
Yellow
Green & Yellow
Which of these materials would NOT act as an electrical insulator?
Rubber
Glass
Copper
Wood
A student is attempting to measure the resistance of a component.
What should the student do to obtain a range of results?
Adjust the variable resistor
Swap the cells
Reverse the ammeter
Swap the ammeter and voltmeter
A resistance of 33 Ω (ohms) has a current of 0.2 A passing through it.
What is the potential difference across the resistor?
0.2 V
0.66 V
6.6 V
33 V
Which of these resistances conducts best?
0.1 kilo-ohms
1 mega-ohm
10 ohms
100 ohms
The equation linking charge flow, Q, and current, I, is…
Q = I/t
Q = I × t
Q = t/I
Q = I + t
The resistance of a thermistor is affected by…
temperature
moisture
light levels
pressure
What type of fuse should be fitted to a kettle rated as 230 V, 2300 W?
3 A
5 A
7 A
13 A
Look at this circuit.
What is the total resistance of this combination of resistors?
2 Ohms
8 Ohms
15 Ohms
35 Ohms
Before being distributed through the National Grid, the output of a power station passes through a…
step-out transformer
step-in transformer
step-down transformer
step-up transformer
An LED is an electrical device. What does 'LED' stand for?
Low-energy device
Light-efficient dimmer
Low-efficiency diode
Light-emitting diode
Three cells, each of potential difference 4 V, are arranged in series.
They provide a potential difference of…
1.3 V
4 V
7 V
12 V
Which colour wire connects to the fuse in a plug?
Blue
Brown
Yellow
Yellow & Green
A 10 cm length of wire has a reistance of 25 Ω (ohms).
A 30 cm length of the same wire will have a resistance of…
50 ohms
100 ohms
8 ohms
75 ohms
In the UK, the live wire is at an alternating potential difference of…
0 V
120 V
230 V
390 V
What type of current do cells and batteries provide?
a.c. only
d.c. only
a.c. and d.c.
neither a.c. nor d.c.
Which of these statements about a diode is true?
A diode lets current through in only one direction
A diode lets current through in both directions
A diode has low resistance in all arrangements
A diode has zero resistance
Transformers in the National Grid are essential to distribute electricity…
efficiently
safely
fairly
quickly
