6 marksFoundation and Higher
A student measures the resistance of a length of wire. The diagram shows the correct circuit.
.1How is the voltmeter connected to the wire R?
[1 mark] .2The voltmeter reads 3.0 V. The ammeter reads 150 mA.
Calculate the resistance of the wire.
[3 marks] .3The student switches the circuit off between readings. Suggest why.
[2 marks] 5 marksFoundation and Higher
A student wants to find the density of a small irregular stone. They have a balance, a measuring cylinder and water.
.1Describe how the student can find the volume of the stone.
[2 marks] .2The water level rises from 50 cm³ to 70 cm³. The mass of the stone is 52 g.
Calculate the density of the stone.
[2 marks] .3Suggest one reason the student's value for the volume might be inaccurate.
[1 mark] 5 marksFoundation and Higher
The diagram shows the horizontal forces on a car.
car3000 N driving force1800 N air resistance400 N friction
.1Calculate the resultant force on the car.
[2 marks] .2Describe the effect of this resultant force on the motion of the car.
[1 mark] .3Air resistance is a contact force. Gravity is a non-contact force. Explain the difference.
[2 marks] 4 marksFoundation and Higher
A gas is sealed in a strong steel container so that its volume cannot change. The container is heated.
Explain why the pressure of the gas increases. Use ideas about particles.
[4 marks]7 marksFoundation and Higher
A current of 0.25 A flows through a 47 Ω resistor.
.1Calculate the power transferred in the resistor.
Give your answer to 2 significant figures.
[3 marks] .2The p.d. across the resistor is 11.75 V. In one minute, 15 C of charge flows through it.
Calculate the energy transferred in one minute.
[2 marks] .3Show that your answers to parts 1 and 2 agree, and explain why.
[2 marks] 