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 2241: The electric potential at a distance d from a point charge q in air of permittivity e_o is expressed as Options:
  A) q² ÷ 4πe_od
  B) q² ÷ 4πe_o
  C) q ÷ 4πe_od²
  D) q ÷ 4πe_od
  E) q ÷ 4πe_o²d
  Show Answer
  The correct answer is D .
• Question 2242: An engine of a car of power 80 kW moves on a rough road with a velocity of 32 ms^-1. The forces required to bring it to rest is Options:
  A) 2.56 x 10⁶N
  B) 2.50 x 10⁶N
  C) 2.80 x 10³N
  D) 2.50 x 10³N
  Show Answer
  The correct answer is D .
• Question 2243: A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC Options:
  A) 100.08m
  B) 100.04m
  C) 99.96m
  D) 99.92m
  Show Answer
  The correct answer is D .
• Question 2244:

  

  Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible.

  Options:
  A) 12 V
  B) 8 V
  C) 2 V
  D) 36 V
  Show Answer
  The correct answer is B .
• Question 2245: The unit of moment of a couple can be expressed in? Options:
  A) N m^-1
  B) N m^-2
  C) N m
  D) N m²
  Show Answer
  The correct answer is C .
• Question 2246: 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 2247: If the inclination at Ibadan is 7^oS, this means that Options:
  A) the angle between the geographic meridian and the magnetic meridian at Ibadan is 7^o
  B) the earth's magnetic intensity at Ibadan makes angle 7^o with the horizontal direction
  C) a magnetic needle will be inclined at 7^o to the vertical at Ibadan
  D) the north pole of a magnetic needle dips downward at Ibadan
  Show Answer
  The correct answer is B .
• Question 2248:
  

  The fiqure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40${}^o$, then the value of W is

  Options:
  A) 28.0N
  B) 48.0N
  C) 288.0N
  D) 50.0N
  Show Answer
  The correct answer is D .
• Question 2249: Alternating current can induce voltage because it has a Options:
  A) ripple value
  B) varying magnetic field
  C) weaker magnetic field than direct current
  D) stonger magnetic field than direct current
  E) high peak value
  Show Answer
  The correct answer is D .
• Question 2250: When an atom loses or gains a charge, it becomes an Options:
  A) ion
  B) an electron
  C) a neutron
  D) a proton
  E) a deuteron
  Show Answer
  The correct answer is A .