i) Stress = 107
ii) Strain = 0.5 x 10°

i) Youngs Modulus = 2 ५10" Nim?

A:Only iand ii
B:-Only ॥ and iii
C-Only 876 iii
D-All of the above (i, ॥ and ii)
Correct Answer: Option-D
Question15:-100 calories of heat is added to 10 grams of water, find the rise in the temperature of water. Given specific heat of water = 1 ‏ع "نولاق‎
i) Given data is insufficient
1) 30°C
1) 10°C
A:Only i
B-Only ii
‏الا رادم‎
D:-None of the above
Correct Answer: Option-D
‘Question16:-There is a change in temperature accompanying expansion of a gas without production of work or transfer of heat. Which of the following propositions related to the given
Statement is true 7
i) This is called Joule-Thomson effect.
li) This process is used in liquefying gases.
iii) Hydrogen and helium will obey this at room temperature
A:Only iand ii
B:-Only ॥ and iii
C-Only 876 iii
D-All of the above (i, ॥ and ii)
Correct Answer: Option:
‘Question17::Which of the following propositions related to the Doppler Effect is true 7
1) as one approaches a blowing horn, the perceived pitch is higher until the hom is reached.
ii) light from a distant star, observed from the Earth, shifts toward the red end of the spectrum if the Earth and star are receding from each other.
iii) Doppler effect will only take place when the velocity of the source wave is less than the velocity of the wave.
A:Only iand ii
B:-Only ॥ and iii
C-Only 876 iii
D-All of the above (i, ॥ and ii)
Correct Answer: Option-D
व simple harmonic motion is represented by x = 10sin (20t + 0.5). Which among the following propositions are true ? (displacement is measured in metres and time in
second).
i) amplitude = 10 ए)

ii) angular frequency
li) frequency = 10/2 7.

A:Only i
B-Only ii
C-Only 876 iii
D-All of the above (i, ॥ and ii)
Correct Answer: Option:
Question19:-Which of the following statements are true about viscosity 7
i) It is the opposing force between moving fluid layers.
ii) Viscosity of liquids increase as temperature increases.
il) Viscosity of gases increase as temperature increases.
A:Only iand ii
B:-Only ॥ and iii
C-Only 876 iii
D-All of the above (i, ॥ and ii)
Correct Answer: Option-C
‘Question20::What is true about a reflecting telescope 7
i) ॥ can examine visible light only.
ii) thas lesser aberrations than refracting telescope.

i) has only a single mirror.

A:Only i