(Antonyms) Part – B General Knowledge (Solved Paper 2024 – II) (51 to 100)

Total Questions: 50

41. A vehicle starts moving along a straight line path from rest. In first t second it moves with an acceleration of 2m/s² and then in next 10 seconds it moves with an acceleration of 5m/s². The total distance travelled by the vehicle is 550m. The value of time t is

Correct Answer: (a) 10 s
Solution:The velocity-time graph of moving vehicle is

42. A pumkin weighs 7.5 N. On submerging it comletely in water, 3/4 L of water gets displaced. The acceleration due to gravity at the place where the pumpkin was weighed is 10m/s². Which one of the following is the correct value of the density of the pumpkin?

Correct Answer: (c) 1000 kg/m³
Solution:

43. An incandescent electric bulb converts 20% of its power consumption into light, and the remaining power is dissipated as heat. The bulb's filament has a resistance of 200 Ω and 2 A current flows through it. If the bulb remains ON for 10h and the rate of electricity charge is rate ₹ 5/unit, then which among the following is the correct amount for the money spent on producing light?

Correct Answer: (d) ₹ 8
Solution:

44. Which one of the following statements best defines the concept of heat?

Correct Answer: (c) The transfer of energy due to temperature difference
Solution:Heat transfer takes place due to temperature difference.

45. The masses of two planets are in the ratio of 1:7. The ratio between their diamenters is 2:1. The ratio of forces which they exert on each other is

Correct Answer: (c) 1 : 1
Solution:For two planets.

46. A car weights 1000 kg. It is moving with a uniform velocity of 72 km/h towards a straight road. The driver suddenly presses the brakes. The car stops in 2.0s. The retarding force applied on the car to stop it is

Correct Answer: (d) 100 kN
Solution:

47. There is a ball of mass 320 g. It has 625 J potential energy when released freely from a height. The speed with which it will hit the ground is

Correct Answer: (a) 62.5 m/s
Solution:(a)

48. Starting from rest a vehicle accelerates at the rate of 2m/s² towards east for 10s. It then stops suddenly. It then accelerates again at a rate of 4√2 m/s² for next 10 s towards south and then again comes to rest. The net displancement of the vehicle from the starting point is

Correct Answer: (c) 300m
Solution:

49. Which one of the following statements about the Industrial Revolution is correct?

Correct Answer: (c) James Watt's invention converted the steam engine from being a mere pump into one which would provide energy to power machines in factories
Solution:
  • Thomas Savery did not invent the astrolabe; he is credited with inventing the first practical steam pump.
  • Thomas Newcomen did not invent chemical dyes; he improved upon Savery's steam engine by creating the atmospheric engine.
  • James Watt's invention converted the steam engine from being a mere pump into one that could provide energy to power machines in factories.
  • Mathew Boulton did not discover the technique of refining gold; he was an entrepreneur and partner of James Watt, helping to commercialize the steam engine.

50. The first cotton mill in British India which began production in 1856 was set up by

Correct Answer: (d) C. N. Davar
Solution:The first cotton mill was established near Kolkata in 1818 at first Gloster but was a failure and was closed. Thus, the first successful cotton mill was established in Bombay by Cowasjee Nanabhai Davar and his associates on 7th July 1854 at Tardeo.