Electrical Systems

What is voltage?

• the rate of flow of charge

• the difference in potential between 2 points

• the amount of available charge

What is the unit of measurement for resistance?

• Voltage

• Ampere

• Watts

• Ohms

Which resistor will prevent the most current flow?

• 1 ohm

• 100 ohms

• 1000 ohms

• 0.5k ohms

If a circuit has two resistors in parallel both are 4Ω, what is the total resistance of the circuit?

• 1Ω

• 2Ω

• 4Ω

• 8Ω

in which circuit is the lamp brightest

• 1

• 2

• 3

• All the same

As the length of a wire increases, the resistance of the wire will

• increase

• decrease

• stay the same

As the diameter of a wire increases, the resistance of the wire will

• increase

• decrease

• stay the same

What other factor of a wire could affect its resistance?

• Material its made of

• How shiny it is

• Colour

Which one of the following will make each bulb in the circuit less bright?

• Removing one bulb from the circuit

• Removing the switch from the circuit

• Adding one bulb in series to the circuit

• Adding one battery in series to the circuit

Irfan wants to find out if the arrangement of the bulbs in a circuit affects their brightness. He sets up four circuits as shown below.

Which pair of circuits should he use to ensure a fair test?

• P and S

• P and Q

• R and P

• R and Q

Tags

NGSS.MS-ETS1-3