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 21: Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to Options:
  A) heat dissipation
  B) production of eddy currents
  C) excessive current discharge
  D) excessive voltage distance
  Show Answer
  The correct answer is A .
• Question 22: When ${}_{82}^{210}Pb$ decays to ${}_{80}^{206}Pb$, it emits Options:
  A) two alpha and two beta particles
  B) an alpha particle
  C) one beta particle
  D) one alpha and one beta particle
  Show Answer
  The correct answer is B .
• Question 23:

  Which of the following is a type of incandescent light source?

  Options:
  A) Fluorescent lamp
  B) LED lamp
  C) Tungsten filament lamp
  D) Neon lamp
  Show Answer
  The correct answer is C .
• Question 24: When the brakes in a car are applied, the frictional force force on the tyres is Options:
  A) is a disadvantage because it is in the direction of the motion of the car
  B) is a disadvantage because it is in the opposite direction of the motion of the car
  C) is an advantage because it is in the direction of the motion of the car
  D) is an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 25: 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 .
• Question 26: A platinum resistance thermometer records 3.0$\mathrm{\Omega }$ at 0^oC and 8.0$\mathrm{\Omega }$ at 100^oC. If it records 6.0$\mathrm{\Omega }$ in a certain environment, The temperature of the medium is Options:
  A) 80^oC
  B) 60^oC
  C) 50^oC
  D) 30^oC
  Show Answer
  The correct answer is B .
• Question 27:

  Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^3 kgm-3 and the air above is at a pressure of 101.3 kPa.

  [Take g = 9.8 ms-2]

  Options:
  A) 422.7
  B) 220.14
  C) 464.53
  D) 321.74
  Show Answer
  The correct answer is A .
• Question 28: The relationship between L and the wavelength I of the stationary wave is Options:
  A) 2L = $\lambda$
  B) L = $\lambda$
  C) L = $\frac{\lambda }{3}$
  D) 4L = 3 $\lambda$
  Show Answer
  The correct answer is D .
• Question 29: An alternating source is connected in series to a capacitor of capacity reactance ${10}^3\sqrt{3}$ and a resistor of resistance 10³ Ohms. The Impedance of the circuit is... Options:
  A) $2000\sqrt{3}$ Ohms
  B) 2000 Ohms
  C) $1000\sqrt{3}$ Ohms
  D) 1000 Ohms
  Show Answer
  The correct answer is B .
• Question 30:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .