Free Printable End of P4 test

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End of P4 test

Total questions: 44

Worksheet time: 25mins

Name

Class

Date

How big would the current be at X, Y and Z?

It would be biggest at X and smallest at Z

It would be biggest at Z and smallest a X

There would be no current at Y.

It would be the same at all three places.

You can make the current in a series circuit smaller by:

putting a switch in the circuit.

putting more bulbs in the circuit.

taking some bulbs out of the circuit.

putting more cells in the circuit.

Which of these circuits are parallel circuits?

X and Y only

X and Z only

Y and Z only

all of them

Parallel circuits are used for house lights:

so they can all be switched on and off together.

so you know when one breaks, because all the others go off.

so they use a bigger current.

so they can all be switched on and off separately.

Which of these statements is not true?

The currents at Q and R add up to give the current at S.

The current is the same at P and S.

The current is the same at Q and R.

The current is the same at P and Q.

Which statement is the best definition of potential difference? Circle the one correct letter.

the charge transferred by each volt of energy

the energy transferred in a circuit

the energy transferred by each coulomb of charge

the energy transferred by each amp of current

Which switches must be pressed to make ONLY lamp X come on?

1 and 2 only

1 and 3 only

2 and 3 only

all three of them

The units for potential difference are:

amps

ohms

volts

coulombs

The units for electrical current are

amps

ohms

volts

coulombs

10.

The units for electrical charge are

amps

ohms

volts

coulombs

11.

The units for energy are

volts

coulombs

joules

watts

12.

Electrical current in a wire is a flow of

positive electrons

positive protons

negative electrons

negative protons

13.

Jim measures the current in the motor. The arrangement he uses to do this is

14.

Sally and Kate measure the current in a wire at different voltages. Sally plots their results on a graph. Which of these lines show the line of best fit Sally should draw?

15.

Ben has a small battery operated fan. He wants to make the fan spin more slowly so he adds a resistor in series with the fan circuit which decreases the speed of the motor. Which of these explains why the fan spins more slowly?

Adding the resistor decreases the voltage across the battery

Adding the resistor increases the power of the battery

Adding the resistor increases the friction in the motor

Adding the resistor decreases the current in the motor

16.

Jason and Zubeda are investigating how current varies with voltage for a filament lamp. Which circuit should they use?

17.

Here is a graph showing how current varies with voltage for a filament lamp. What is the resistance of the filament lamp at 6 V?

0.25 Ω

1.5 Ω

4.0 Ω

9.0 Ω

18.

Here is a graph showing how current varies with voltage for a filament lamp. Which of these is a correct analysis of the graph?

The resistance of the lamp increases when the current increases

The resistance of the lamp decreases when the current increases

The current in the lamp is directly proportional to the voltage across it

The voltage across the lamp is directly proportional to the current in it

19.

The graph shows how the resistance of a thermistor (electrical component with variable resistance) changes with temperature. What temperature change corresponds to a resistance change from 7000 Ω to 2000 Ω?

2 °C

26 °C

30 °C

32 °C

20.

Elaine and Esther measure the current in different resistors. They also measure the voltage across each resistor. These are their results. Which of these is a correct conclusion from their results?

the bigger the resistance the bigger the current

the bigger the voltage the bigger the current

the bigger the resistance the smaller the current

the bigger the voltage the smaller the resistance

21.

Elaine and Esther measure the current in different resistors. They also measure the voltage across each resistor. These are their results. When they use the 40 ohm resistor, the current X is

10 A

4 A

0.25 A

0.125 A

22.

Here is a graph showing how current varies with voltage for a resistor. The resistance at 2 V is

0.1 Ω

0.2 Ω

0.4 Ω

10 Ω

23.

Here is a graph showing how current varies with voltage for a resistor. The graph shows that the resistor's resistance is

always constant

always changing

steadily decreasing

steadily increasing

24.

Each cell has an output voltage of 1.5 V. Which of these shows how the cells should be connected to give an output voltage of 6 V?

25.

Which of these circuits has the largest current?

26.

Alison, Bill, Cerys and Dave use a solar panel to investigate sunglasses with different coloured glass. Which of these graphs is the best way of displaying the students’ results?

27.

Which of these statements is INCORRECT?

Electric current is measured with an ammeter.

An electric current is a flow of charge.

A current in a wire is a flow of copper atoms.

Electrons have a negative charge.

28.

Which set of meter readings in these circuits is correct?

29.

A student wants to test the hypothesis "the resistance of a wire depends on the thickness of the wire". Which row of the table shows the correct variables for the test.

30.

A toy car travels around a track until its battery runs out. Some students investigate different makes of 1.5 V battery by testing each battery with the same car and track. They time how long each make of battery lasts. Which of these is the independent variable (the variable the students change) in this investigation?

how long each battery lasts

the type of car

the distance the car travels

the make of battery

31.

Which of these shows the symbol for a variable resistor?

32.

Some students investigate how the current in a resistor varies with voltage. Which row of the table is correct for their investigation?

33.

What will happen if we add another 4 Ω resistor in parallel with the first two?

the voltage across each resistor will decrease to 2 V

the current from the power supply will decrease

the current from the power supply will stay the same

the current from the power supply will increase

34.

In the equation V = I x R , I is the

power

energy

voltage

current

35.

The graph shows how the resistance of the thermistor changes with temperature. Which of these is correct for the thermistor?

the resistance of the thermistor decreases as temperature increases

the resistance of the thermistor increases as temperature increases

the resistance of the thermistor decreases as temperature decreases

the resistance of the thermistor does not depend on temperature

36.

The graph shows results of measuring current through and potential difference across two resistors, X and Y. Which row of the table is correct for the resistors?

37.

The following circuits show a lamp connected to different combinations of resistors. The battery and lamp are identical in each circuit. In which circuit is the current in the lamp biggest?

38.

What potential difference is needed to make a current of 2.5 A flow through a 18 Ω resistor?

$2.5\ A\ \div18\ \Omega$

$2.5\ A\times18\ \Omega$

$18\ \Omega\div2.5\ A$

$2.5\ A^2$

39.

What current will flow through a 400 Ω resistor when it is connected to a 10 V power supply?

$10\ V\ \times400\ \Omega$

$400\ \Omega\ \div10\ V$

$10\ V\div400\ \Omega$

40.

What current flows when 36 C of charge flows past a point in a circuit in one minute?

$36\ C\times1\ \min$

$36\ C\div1\ \min$

$60\ s\div36\ C$

$36\ C\div60\ s$

41.

A flashbulb requires a current of 5 A. The flash lasts 0.02 s. How much charge flows through the bulb in this time?

$5\ A\times0.02\ s$

$5\ A\ \div0.02\ s$

$0.02\ s\div5\ A$

42.

A rechargeable battery stores 7200 C of charge. For how long can it make a current of 4 A flow through a resistor?

$7200\ C\ \times4\ A$

$7200\ C\ \div4\ A$

$4\ A\ \div\ 7200\ C$

43.

The charge on an antique lamp is 400C. The potential difference across the lamp is 1.5V.

Calculate the energy transferred to the lamp

$400\ C\ \div1.5\ V$

$1.5\ V\ \div400\ C$

$1.5\ V\times400\ C$

44.

In the equation Q = I x t , Q is the

potential difference

energy

charge

current

Reset

End of P4 test

Total questions: 44

Worksheet time: 25mins

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