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 41:
  

  Two mirrors of the same length are arranged as shown in the diagram. A ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

  Options:
  A) 220${}^o$
  B) 200${}^o$
  C) 210${}^o$
  D) 180${}^o$
  Show Answer
  The correct answer is D .
• Question 42: If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT? Options:
  A) 4:01
  B) 1:04
  C) 5:01
  D) 2:01
  Show Answer
  The correct answer is A .
• Question 43: A piece of substance of specific head capacity 450JKg^-1K^-1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms^-2] Options:
  A) 2/9°C
  B) 4/9°C
  C) 9/4°C
  D) 9/2°C
  Show Answer
  The correct answer is B .
• Question 44:

  Light of wavelength 589 nm in vacuum passes through a piece of fused quartz of index of refraction n = 1.458. What is the frequency of the light in fused quartz?

  [Speed of light c = $3.00\times {10}^{8}m{s}^{-1}$]

  Options:
  A) $5.09\times {10}^{15}$Hz
  B) $5.09\times {10}^{14}$ Hz
  C) $1.77\times {10}^{15}$ Hz
  D) $1.77\times {10}^{14}$ Hz
  Show Answer
  The correct answer is B .
• Question 45:

  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 46:

  What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

  Options:
  A) Bohr model
  B) Dalton model
  C) Rutherford model
  D) Thomson model
  Show Answer
  The correct answer is A .
• Question 47:

  

  PQ is a thin rod on a horizontal table, RS is a plane mirror inclined at ${45}^{\circ }C$ to the horizontal as shown above. The image of PQ as seen in the mirror by the eye T is

  Options:
  A) horizontal
  B) parallel to the mirror
  C) at infinity
  D) vertical
  E) highly magnified
  Show Answer
  The correct answer is B .
• Question 48:

  The linear expansivityof brass is 2 x 10${}^{-5}$ ${}^o{C}^{-1}$. If the volume of piece of brass is 10cm${}^3$ at 0${}^o$C. What will be its volume at 100${}^o$C?

  Options:
  A) 10.06cm${}^3$
  B) 10.04 cm${}^3$
  C) 10.02 cm${}^3$
  D) 10.20 cm${}^3$
  Show Answer
  The correct answer is A .
• Question 49:

  A piece of substance of specific heatcapacity 450Jkg${}^{-1}$k${}^1$ falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms${}^{-2}$]

  Options:
  A) $\frac{2}{9}$ºC
  B) $\frac{4}{9}$ºC
  C) $\frac{9}{2}$ºC
  D) $\frac{9}{4}$ºC
  Show Answer
  The correct answer is B .
• Question 50: A parallel plate capacitor has a common plate area of 5 x 10^-8m² and plate separation of 2 x 10³m, Assuming free space, What is the capacitance? [$\epsilon$_o = 9.0 X 10^-12C²N^-1m^-2] Options:
  A) 2.25 x 10^-17F
  B) 4.50 x 10^-17F
  C) 2.25 x 10^-16F
  D) 4.50 x 10^-16F
  Show Answer
  The correct answer is C .