πŸ“Š Physics
Q. A sound wave having wavelength λ from stationary waves after reflection from surface . the distance between two consecutive nodes is
  • (A) λ
  • (B) λ / 2
  • (C) λ / 4
  • (D) λ / 8
πŸ’¬ Discuss
βœ… Correct Answer: (B) λ / 2
πŸ“Š Physics
Q. What is the resulting temperature t when 150 g of ice at 0 ℃ is mixed with 300 g of water at 50 ℃ ?
  • (A) 25℃
  • (B) 33.3℃
  • (C) 13.4℃
  • (D) 6.6℃
πŸ’¬ Discuss
βœ… Correct Answer: (D) 6.6℃
πŸ“Š Physics
Q. Which of the following preferred rpm for 4 pole induction motor?
  • (A) 1500 rpm
  • (B) 1470 rpm
  • (C) 1440 rpm
  • (D) 1320 rpm
πŸ’¬ Discuss
βœ… Correct Answer: (A) 1500 rpm
πŸ“Š Physics
Q. An object placed at 60cm in front of a concave mirror makes an image 30 cm in front of the mirror, then what is the distance of the focus of the mirror.
  • (A) 10cm
  • (B) 5cm
  • (C) 20cm towards the mirror
  • (D) 20cm behind the mirror
πŸ’¬ Discuss
βœ… Correct Answer: (C) 20cm towards the mirror
πŸ“Š Physics
Q. A vehicle stops in 20 sec after applying brakes, if the constant retardation due to the brakes is 1.5 m/sec², then what was the initial velocity of the vehicle.
  • (A) 30m/sec
  • (B) 3m/sec
  • (C) 15m/sec
  • (D) 40m/sec
πŸ’¬ Discuss
βœ… Correct Answer: (A) 30m/sec
πŸ“Š Physics
Q. Time period of a simple pendulum is 1.5 sec. If the length of the pendulum is increased by 4 times then what is the new time period.
  • (A) 13 sec
  • (B) 3 sec
  • (C) 1 sec
  • (D) 5 sec
πŸ’¬ Discuss
βœ… Correct Answer: (B) 3 sec
πŸ“Š Physics
Q. Consider a static point charge. if the charge is negative, then the electric line of the forces are :
  • (A) Concentric circles with charge at the centre
  • (B) Straight lines radiating away from the charge
  • (C) Straight lines converging towards the charge
  • (D) Parallel straight lines
πŸ’¬ Discuss
βœ… Correct Answer: (C) Straight lines converging towards the charge
πŸ“Š Physics
Q. A wire of resistance 10 Ω is elongated through a die to double its length . its resistance will change to
  • (A) 40 Ω
  • (B) 20 Ω
  • (C) 15 Ω
  • (D) 5 Ω
πŸ’¬ Discuss
βœ… Correct Answer: (A) 40 Ω
πŸ“Š Physics
Q. 50w and 250v is marked on a lamp. Then what is the value of the current flowing in the circuit.
  • (A) 0.5 Ampere
  • (B) 0.4 Ampere
  • (C) 0.2 Ampere
  • (D) 0.3 Ampere
πŸ’¬ Discuss
βœ… Correct Answer: (C) 0.2 Ampere
πŸ“Š Physics
Q. The time period of a pendulum depends on
  • (A) The mass
  • (B) The length
  • (C) The time
  • (D) Both the mass and the length
πŸ’¬ Discuss
βœ… Correct Answer: (B) The length

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