Question 1

What is the equation that relates voltage, current, and resistance?

Accepted Answer

V = I x R

Answer

V = I / R

Answer

V = R / I

Answer

I = V / R

Question 2

What is the purpose of a diode in an electrical circuit?

Accepted Answer

to allow current flow in one direction only

Answer

to increase resistance

Answer

to decrease current

Answer

to control voltage

Question 3

What is the unit used to measure electric current?

Accepted Answer

ampere

Answer

volt

Answer

ohm

Answer

watt

Question 4

What is the fastest?

Accepted Answer

Light

Answer

A cheetah

Answer

A plane

Answer

Sound

Question 5

Which of the following is an example of a longitudinal wave?

Accepted Answer

Sound

Answer

Light

Answer

X-ray

Answer

Radio wave

Question 6

Which of the following is an example of a chemical change?

Accepted Answer

Burning wood

Answer

Swinging a pendulum

Answer

Melting ice

Answer

Mixing sugar in water

Question 7

Which of the following is a characteristic of a solid?

Accepted Answer

Definite shape and volume

Answer

Variable shape and volume

Answer

Variable shape but definite volume

Answer

Definite shape but variable volume

Question 8

What is the process called when a solid changes into a gas?

Accepted Answer

Evaporation

Answer

Freezing

Answer

Melting

Answer

Condensation

Question 9

What is the equipment used to measure mass ?

Accepted Answer

Top pan balance

Answer

Kilogram

Answer

Thermometer

Answer

Ruler

Question 10

Which of the following waves can be detected by the human eye?

Accepted Answer

Visible light

Answer

Ultraviolet radiation

Answer

X-rays

Answer

Infrared radiation

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