Communication System Test

Result

Communication System Test - 27

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Weekly Quiz Competition

Question 1
4 / -1

Hubble showed that the universe as a whole is expanding and the distant stars are receding from us. The spectral line from a star, when compared with the corresponding line from a source will then show

A
A shift in frequency towards the red end

B
A shift in frequency towards the violet end

C
No shift in frequency at all

D
A shift in frequency towards the violet end as well as a decrease in intensity
Question 2
4 / -1

The solar constant on the surface of the earth is S. What will be it value on the surface of another planet which is about 5.3 A.U. away from sun?

A

B

C

D

Solution
Question 3
4 / -1

CO₂ gas is found in which of the following pairs of the planet?

A
Earth and Mercury

B
Mercury and Saturn

C
Venus and Saturn

D
Venus and Mars

Solution
Question 4
4 / -1

The wavelength of maximum energy, released during an atomic explosion, was 2.93×10^–10 m. Given that the Wien\'s constant is 2.93 × 10^–3 m K, the maximum temperature attained must be of the order of

A
10^–7 K

B
10⁷ K

C
10^–13 K

D
5.86 × 10^–7 K

Solution
Question 5
4 / -1

Black hole is a

A
Hole in the ozone layer of atmosphere

B
Hole in earth's centre

C
Highly dense matter available in the atmosphere

D
Hole in troposphere
Question 6
4 / -1

A planet of mass M has a satellite of mass m, revolving around the planet in a circular orbit of radius r and time period T. The mass (M) of the planet is

A

B

C

D

Solution
Question 7
4 / -1

The age of universe is believed to be

A
1 billion years

B
10 billion years

C
10-20 billion years

D
1000 billion years
Question 8
4 / -1

Sun radiates continuously and maintains its brightness because

A
Helium is converted into iron in its core

B
Of fusion of hydrogen nuclei into helium

C
Fusion of helium in hydrogen

D
Burning of carbon, in its core
Question 9
4 / -1

Venus appears brighter than other stars because

A
It is heavier than other planets

B
Its density is more than other planets

C
It is nearer to earth in comparison to other planets

D
Nuclear fusion takes place at its surface
Question 10
4 / -1

There is no atmosphere on moon because

A
There is no vegetation

B
The escape velocity at its surface is very low

C
Diffusion constant of gases is high

D
There is vacuum in space