Electric Field

Multiple Choice

The current flowing through a resistor is 0.30A when a p.d. of 4.5V is applied across it. Calculate the value of the resistor

• 15 Ohms

• 1.5 Ohms

• 0.15 Ohms

• 1.35 Ohms

Multiple Choice

A current of 0.2A flows through a resistor of 10 ohms. Calculate the p.d. across the resistor.

• 20 V

• 2.0 V

• 0.2 V

• 5 V

Multiple Choice

A p.d. of 12V is appled across a lamp of 24 Ohms and the lamp lights up. Calculate the current passing through the lamp.

• 5 A

• 2 A

• 0.5 A

• 0.2 A

Multiple Choice

A large battery is labelled with various items of information about the battery.

One of these items of information in the option below is the electromotive force (e.m.f.) of the battery.

What is the e.m.f. of the battery?

• 12 V

• 30 kg

• 216 kJ

• 680 A

Multiple Choice

The circuit shown is being used to measure the resistance of resistor Z.

What is the correct combination of meters to determine the resistance of resistor Z?

• X: Ammeter

  Y: Voltmeter

• X: Ammeter

  Y: Ammeter

• X: Voltmeter

  Y: Ammeter

• X: Voltmeter

  Y: Voltmeter

Multiple Choice

The potential difference across an appliance in a circuit is 220V. If the resistance posed by the appliance to the flow of current is 18.3 Ohms, calculate the current flowing through the appliance.

• 4026 A

• 238.3 A

• 12.02 A

• 10.00 A