S2 Science Unit 8 Making use of electricity

Which of the following are insulators?

(1) Chalk

(2) Pencil lead

(3) Rubber tubing

(4) Aluminium foil

• (1) and (3) only

• (1) and (4) only

• (1), (2) and (3) only

• (1), (2), (3) and (4)

Which of the following correctly describes the direction of the current flowing in the circuit above?

• Positive terminal of battery → light bulb → switch → negative terminal of battery

• Negative terminal of battery → switch → light bulb → positive terminal of battery

• Positive terminal of battery → switch → light bulb → negative terminal of battery

• The current sometimes flows clockwise and sometimes anticlockwise.

What is the reading of the ammeter shown?

• 36 mA

• 336 mA

• 360 mA

• 3.6 A

Which of the following does NOT make use of the heating effect of electric current?

• television

• toaster

• kettle

• heater

If we want to measure the voltage across the resistor, how should we connect the voltmeter?

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

The two voltmeters in the circuit below are identical. The voltage of the electric cell is 1.5 V. Which of the following statements about the circuit is correct?

• If voltmeter Q is disconnected, the reading of voltmeter P will become zero.

• The reading of voltmeter P is larger than the reading of voltmeter Q.

• The reading of voltmeter P is smaller than the reading of voltmeter Q.

• Voltmeters P and Q show the same readings.

A student uses an ammeter and a voltmeter to measure the current flowing through a bulb and the voltage across a battery in a circuit. Which of the following circuit diagrams shows the correct connection?

• 
• 
• 
• 

As the resistance of a circuit increases, the current passing through the circuit also increases.

• True

• False

Which of the following statements about a series circuit connected to different light bulbs must be correct?

(1) Currents flowing through different light bulbs in the circuit are the same.

(2) Voltages across different light bulbs in the circuit are the same.

(3) The brightness of different light bulbs is the same.

• (1) only

• (2) only

• (1) and (2) only

• (1), (2) and (3)

Six identical light bulbs are connected in the circuit as shown.

Arrange the light bulbs in descending order of the brightness.

• Z > X, Y > P, Q, R

• P > Q, X > R, Y, Z

• P, X, Z > Q, Y > R

• R, Y, Z > Q, X > P