Physics Electricity

Which of these factors does NOT affect the resistance of a wire?

• The material the wire is made from

• The length of the wire

• The diameter of the wire

• The shape of the wire

What is its power rating?

• 12 W

• 14 W

• 24 W

• 122 W

A residual current device (RCD) switches off the electricity supply if…

• the live and neutral currents are equal

• the live current is greater than the neutral current

• the live current is less than the neutral current

• the live and neutral currents are zero

Which of the following pairs of objects would undergo repulsion?

• A positively charged object next to a negatively charged object

• A positively charged object next to a neutral object

• A negatively charged object next to a neutral object

• A negatively charged object next to a negatively charged object

Tags

NGSS.MS-PS2-3

What could a light-dependent resistor be used to control?

• The temperature of a fridge

• The temperature of the hot water in a water boiler

• The blood flow

• The timing for a streetlight

Tags

NGSS.MS-ETS1-4

Which statement describes a parallel circuit?

• A single loop with the same current passing through all components

• More than one loop with the same current passing through all components

• A single loop with different currents passing through each component

• More than one loop with different currents passing through each loop

Which of these values is a power rating for a domestic lightbulb?

• 230 V

• 2000 W

• 0.5 A

• 11 W

Which of these materials would NOT act as an electrical insulator?

• Rubber

• Glass

• Copper

• Wood

What is the potential difference across the resistor?

• 0.2 V

• 0.66 V

• 6.6 V

• 33 V

Which of these resistances conducts best?

• 0.1 kilo-ohms

• 1 mega-ohm

• 10 ohms

• 100 ohms