AQA GCSE PHYSICS - ELECTRICITY

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