P4 iGCSE waves, inc light and sound

Which of these waves has the shortest wavelength?

• Radio waves
• Visible light
• X-rays
• Gamma rays

What is the equation for wave speed?

• wave speed = wave length x frequency
• wave speed = wave length / frequency
• wave speed = amplitude x frequency
• wave speed = amplitude/ frequency

Which of the following properties of a wave is related to its amplitude?

• Frequency
• Energy
• Wavelength
• Speed

Which one is the type of radiation used for cancer treatment?

• X-ray
• gamma ray
• ultraviolet
• microwave

What do you call the height of a wave?

• Amplitude
• Crest
• Wave length
• Equilibrium

Two resistors are connected in parallel to a power source. R1 has a resistance of 10 ohms. R2 has a resistance of 20 ohms. What is the ratio of their voltages?

• 01:02:00
• 02:01:00
• 01:04:00
• 01:01:00

A charger is rated for 200Wh (watt hours), and in Singapore, wall power is 230V. The charger operates for 1 hour. What is the current being passed through in amps?

• 0.87 A
• 0.88 A
• 87 A
• 88 A

Which of the following wave from the electromagnetic spectrum has the highest frequency?

• Visible Light
• Radio waves
• X-rays
• Microwaves

Which statement below is incorrect about transverse wave?

• Its direction of oscillation is perpendicular to the direction of energy transfer
• an example is light waves
• it has compression and rarefaction
• an example is gamma ray

Which of the following are false regarding electromagnetic waves?

• A) They can travel through a vacuum.
• B) They do not require a medium to travel through.
• C) They travel at a constant speed in a vacuum.
• D) They cannot transfer energy.