yr10 electricity assessment

The circuit diagram shows a resistor connected in series with a cell and a switch.

There is an electric current in the circuit when the switch is closed. What component could be added to the circuit to show that there is a current in resistor X when the switch is closed. Click all that apply

• bulb

• ammeter

• voltmeter

• switch

How should the component you chose in question 1 be connect?

• in series

• in parallel

The electric current in the circuit is a flow of charged particles.

Each charged particle has a charge of -1.6 × 10^-19 C.

Give the name of the charged particle.

• protons

• electrons

• neutrons

When the switch is closed, the current in the cell is 16 A.

Calculate the charge that passes through the cell in 25 s.

[charge transferred = current × time taken]

Answer explanation

400

400c

400C

Resistor X in the circuit is replaced by resistor Y.

Resistor Y has a higher resistance than resistor X.

Explain how the number of charged particles passing through the cell each second changes when resistor X is replaced by resistor Y. Clicl ALL that apply

• fewer electrons will flow

• current will decrease

• current will increase

• more electrons will flow

• voltage stays the same

The diagram shows an electric circuit containing component X and a lamp connected in series.

Name the component that would be added to measure the voltage of component X.

• volt reader

• voltmeter

• ammeter

• Resistor

Name component X

• LDR (light dependent resistor)

• LED (Light emitting diode)

• Fuse

• Thermistor

• variable resistor

The graph shows how the resistance of component X changes with light intensity.

 Use the graph to determine the resistance of component X when the light intensity is 4.0 arbitrary units.

Answer explanation

1700

1700 ohms

The current in the circuit is 0.0018 A.

Calculate the voltage across component X at a light intensity of 4.0 arbitrary units

• 3.06V

• 3.06A

• 944444.4V

• 10000A

what happens to the brightness of the lamp when component X is covered with a dark sheet of paper.

• brightness will decrease because as light intensity decreases, resistance increases meaning current will decreases

• Brightness will increases because as light intensity decreases resistance increases meaning current will increase

• Brightness will decreases because as light intensity decreases resistance decreases meaning current will decreases