MCQs

Q301: A particle is travelling among a straight line OX. The distance x in meters of the particle from O at a time t is given by X = 37 + 27t t³ where t is given by X in the seconds. The distance of particles from O when it comes to rest is W3.

• A) 101m
• B) 81m
• C) 91m

Q302: Ultra violet light is more likely to cause a photoelectric effect than a visible light. This is because photons of ultraviolet light _____?

• A) Have a higher energy
• B) Have a longer wavelength
• C) Have higher velocity

Q303: If A = B+C and A,B,C have scalder magnitudes of 5,4,3 unit respectively then the angle between vector A and vector B is _____?

• A) Sin-1 (3/4)
• B) Cos-1 (3/5)
• C) Cos-1 (4/5)

Q304: The dimension formula of angular momentum is?

• A) [M L T⁻²]
• B) [M L² T⁻¹]
• C) [M L² T⁻²]

Q305: The angular acceleration is produced by _______?

• A) Momentum
• B) Pressure
• C) Torque

Q306: Pick up the correct statement about photochemical smog: Photo chemical smog is caused by NO2, Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours, Photo chemical smog contains nitric oxide and unburnt hydrocarbon as main reactants, Both A and B

• A) Photo chemical smog is caused by NO2
• B) Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
• C) Both A and B

Q307: Which of the following is not an air pollutant? N2, NO, CO, N2O

• A) N2
• B) NO
• C) CO

Q308: Boiling point is low for liquid with ____?

• A) Very high vapour pressure
• B) High vapour pressure at given temperature
• C) Very low vapour pressure

Q309: The focal length of thin convex lens is _____?

• A) Greater than that of thick convex lens
• B) Smaller than that of thick convex lens
• C) Equal than that of thick convex lens

Q310: Sound cannot travel through ______?

• A) Solid
• B) Liquid
• C) Vacuum