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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
- If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
- If a person underwater looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
(a) Only 2
(b) Only 1
(c) 1 and 2
(d) Neither 1 nor 2
The correct answers to the above question in:
Answer: (c)
Discuss Form
Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
Assertion (A):
Steam is more harmful for human body than the boiling water in case of burn.
Reason (R) :
Boiling water contains more heat than steam.
a) Both A and R are true, but R is not the correct explanation of A
b) Both A and R are true and R is the correct explanation of A
c) A is true, but R is false
d) A is false, but R is true
Answer »Answer: (c)
Question : 2
An astronaut sees the colour of the sky as
a) Black
b) White
c) Blue
d) Red
Answer »Answer: (a)
Question : 3
The velocity of sound in any gas depends upon
a) intensity of sound waves only
b) wavelength of sound only
c) density and elasticity of gas
d) amplitude and frequency of sound
Answer »Answer: (c)
Velocity of sound in any gas depends upon density and elasticity of gas.
Question : 4
Consider the following statements.
- The sky appears blue because of less scattering.
- The main cause of seven colours of the rainbow is scattering of light.
- At the time of Sunrise, the Sun appears red, due to scattering of light.
a) Only 2 is true
b) 1 and 3 are true
c) Only 1 is true
d) 2 and 3 are true
Answer »Answer: (b)
Question : 5
Consider the following statements about ultrasonic waves.
- They can destroy insects.
- They can clean clothes by removing dust.
- They can be used to treat diseases.
- They can control automatic doors.
a) 3 and 4 are correct
b) 1, 2 and 3 are correct
c) 1 and 2 are correct
d) All are correct
Answer »Answer: (d)
Question : 6
In the visible spectrum the colour having the shortest wavelength is
a) violet
b) green
c) red
d) blue
Answer »Answer: (a)
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