Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 2811: A waterfall is 6.30m high. What is the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall? (Neglect heat losses to the surroundings, take g as 10 ms^-2 and specific heat capacity of weather as 4200,J kg^-1K^-1 Options:
  A) 0.15°C
  B) 1.50°C
  C) 15.00°C
  D) 21.00 °C
  E) 50.00°C
  Show Answer
  The correct answer is B .
• Question 2812: If the radius of the earth is 6.4 x 10⁶m, the escape velocity of a satellite from the earth is?
  [g = 10 ms^-2] Options:
  A) 1.13 x 10⁴ ms^-1
  B) 9.00 x 10³ ms^-1
  C) 8.00 x 10³ ms^-1
  D) 1.27 x 10⁴ ms^-1
  Show Answer
  The correct answer is A .
• Question 2813: The motion of the wheel of a bicycle moving on a smooth straight road is Options:
  A) oscillatory and random
  B) oscillatory and translational
  C) rotational and oscillatory
  D) rotational and random
  E) rotational and translational
  Show Answer
  The correct answer is E .
• Question 2814:

  T(oC)	0	5	10	15	20	40	60
  S.V.P (mmHg)	4.58	6.51	8.94	12.67	17.50	55.10	149.00

  The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 20^oC is 10mmHg, what is the relative humidity?

  Options:
  A) 170.0%
  B) 57.0%
  C) 17.5%
  D) 10.0%
  Show Answer
  The correct answer is B .
• Question 2815:

  An incident ray XY makes an angle of 15${}^{\circ }$ with a fixed line AY which is normal to surface of a plane mirror if the mirrow is turned as indicated by the arrow through ${40}^{\circ }$, what angle will the reflected ray make with AY?

  Options:
  A) ${25}^{\circ }$
  B) ${40}^{\circ }$
  C) ${15}^{\circ }$
  D) ${55}^{\circ }$
  E) ${95}^{\circ }$
  Show Answer
  The correct answer is D .
• Question 2816: A given quantity of heat increases the temperature of 150grams of water from 9^oC to 15^oC and increases the temperature of oil of 100grams from 9^oC to 25^oC. The ratio of the specific heat of oil to that of water is Options:
  A) 0.36
  B) 0.46
  C) 0.56
  D) 0.76
  E) 0.86
  Show Answer
  The correct answer is C .
• Question 2817: The ability of the human eye to focus object on the retina is referred to as the power of Options:
  A) interference
  B) diffraction
  C) accomodation
  D) superposition
  Show Answer
  The correct answer is C .
• Question 2818: The angle between the direction of the earth's magnetic field and the horizontal is called the Options:
  A) angle of deviation
  B) magnetic declination
  C) magnetic meridian
  D) angle of dip
  Show Answer
  The correct answer is D .
• Question 2819: A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is Options:
  A) 3 : 5
  B) 4 : 5
  C) 7 : 10
  D) 13 : 10
  Show Answer
  The correct answer is B .
• Question 2820: If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is Options:
  A) 5.00W
  B) 4.00W
  C) 2.00W
  D) 25W
  Show Answer
  The correct answer is B .