TEST SERIES - 61 (I)

X-rays are ....... waves

• longitudinal

• transverse

• electromagnetic

• elastic

Transverse waves can propagate

• Both in a gas and in a metal

• In a gas but not in a metal

• Not in a gas but in a metal

• Neither in a gas nor in a metal

The period of pendulum depends upon

• Mass

• Length

• Amplitude

• Energy

The product of the time period of a wave and its frequency is

• Infinite

• Zero

• Unity

• None of the above

With the rise of temperature, the speed of sound in a gas

• Increases

• Decreases

• Remains the same

• None of the above

Sound waves in air are .............. waves

• Longitudinal

• Radio

• Transverse

• Electromagnetic

Sound travels fastest in

• Steel

• Air

• Water

• Vacuum

Which one of the following does TV remote control unit use to operate a TV set?

• Light waves

• Sound waves

• Micro waves

• Radio waves

Ultra violet light of sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of

• Oxygen

• Hydrogen

• Ozone

• Helium

The velocity of light is maximum in

• Diamond

• Water

• Vacuum

• Glass