A. light waves on it
B. microwaves on it
C. radio waves on it
D. ultra high frequency waves on it
Everyday Science Mcqs
A photostat machine works on _____________?
A. electromagnetic image making
B. magnetic image making
C. thermal image making
D. electrostatic image making
The owl can see most clearly in total darkness because:
A. it has squint eyes
B. it has light bulbs in its eyes provided by nature
C. it produces infrasonic sounds
D. it has large eyes with orbs directed forward, giving it binocular sight
The audio signals of TV are _____________?
A. Amplitude modulated
B. Frequency modulated
C. fixe modulated
D. Velocity modulated
The source of the Sun’s energy is the process of ____________?
A. Photoelectric emission
B. Nuclear fission
C. Nuclear fusion
D. Thermionic emission
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
A. it becomes very hard
B. it reflects most of the heat from the sun
C. it has a low specific heat capacity
D. it has a high latent heat of fusion
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
A. Radium dating
B. Uranium dating
C. Carbon dating
D. Deuterium dating
Soap is prepared by boiling caustic soda with ___________?
A. Alcohol
B. Kerosene oil
C. Glycerine
D. Fats
Milk tastes sour when kept in the open for sometime due to the formation of __________?
A. lactic acid
B. citric acid
C. acetic acid
D. carbonic acid
Which of the following statements is true when we see ‘rainbow’ ?
A. We face sun and raindrops
B. The Sun remains behind us and we face raindrops
C. In light rainfall, we face Sun
D. The sky remains clear and the sun is at lower position in the sky