Combination of Resistors

A 3.0 Ω resistor and a 6.0 Ω resistor are connected in parallel.What is their combined resistance?

• 0.50Ω

• 2.0Ω

• 4.5Ω

• 9.0Ω

The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery. What is the current in the battery?

• 0.50A

• 0.75A

• 1.50A

• 2.00A

The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery.What is the current in the 8.0 Ωresistor?

• 0 A

• 0.50A

• 0.75A

• 1.0A

The diagram shows a circuit with a 3.0 Ω resistor and a 2.0 Ω resistor connected in parallel. The switch is open, and the ammeter reads 2.0A. The switch is now closed and the ammeter reads the total current in both resistors. What is the ammeter reading with the switch closed?

• 1.2 A

• 3.0 A

• 4.0 A

• 5.0 A

A 30 Ω resistor is connected in series with another resistor and a 6.0 V battery. The current in the circuit is 0.12 A. A voltmeter is connected across the other resistor. What is the reading on the voltmeter?

• 2.4 V

• 3.6 V

• 6.0 V

• 9.6 V

A circuit contains four ammeters A, B, C and D, and three resistors with different values. Which ammeter shows the largest reading?

• A

• B

• C

• D

Which one of the following resistors connected in parallel with a 24 Ω would give a total resistance of 8 Ω

• 16 Ω

• 12 Ω

• 8 Ω

• 6 Ω

40 lamps, each of resistance 8 are connected in series with a 240 V supply, in order to decorate a tree. The current in each lamp is

• 2.0 A

• 0.75 A

• 1.0 A

• 1.33 A