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 1721:

  The volume of 0.354g of helium at 273°C and 114cm of mercury pressure is 2667cm${}^3$. Calculate the volume

  Options:
  A) 2000.25 cm${}^3$
  B) 200.025 cm${}^3$
  C) 4003.27 cm${}^3$
  D) 2010.25 cm${}^3$
  Show Answer
  The correct answer is B .
• Question 1722: A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change? Options:
  A) 2.6 x 10⁵Nm^-2
  B) 2.4 x 10⁵Nm^-2
  C) 2.2 x 10⁵Nm^-2
  D) 1.3 x 10⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 1723: A galvanometer of resistance 5.0W has full-scale deflection for a current of 100mA. How would its range be extended to 1.0A? By placing a resistance of Options:
  A) $\frac{5}{9}$$\mathrm{\Omega }$ in parallel
  B) $\frac{9}{5}$$\mathrm{\Omega }$ in series
  C) 45$\mathrm{\Omega }$ in parallel
  D) 45$\mathrm{\Omega }$ in series
  E) $\frac{9}{5}$$\mathrm{\Omega }$ in parallel
  Show Answer
  The correct answer is E .
• Question 1724: The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days? Options:
  A) $\frac{1}{16}$
  B) $\frac{1}{4}$
  C) $\frac{1}{2}$
  D) $\frac{15}{16}$
  Show Answer
  The correct answer is D .
• Question 1725: A gas at a pressure of 10⁵Nm^-2expands from 0.6m^-3 to 1.2m³ at constant temperature, the work done is Options:
  A) 7.0 x 10⁶J
  B) 6.0 x 10 ⁶J
  C) 6.0 x 10 ⁵J
  D) 6.0 x 10 ⁴J
  Show Answer
  The correct answer is D .
• Question 1726: The ground stated energy for the hydrogen atom is 5.44 x 10^-19J . If an electron drops from zero energy to ground state, calculate the frequency of the emitted radiation. [h = 6.6 x 10^-34 Js] Options:
  A) 5.0 x 10¹⁶ Hz
  B) 2.0 x 10¹⁶ Hz
  C) 5.0 x 10¹⁵ Hz
  D) 2.0 x 10¹⁵ Hz
  E) No correct option
  Show Answer
  The correct answer is E .
• Question 1727: The force of attraction between two point masses is 10^-4N when the distance between them is 0.18m. If the distance is reduced to 0.06m, calculate the force. Options:
  A) 1.1 x 10^-5N
  B) 3.3 x 10^-5N
  C) 3.0 x 10^-4N
  D) 9.0 x 10^-4N
  Show Answer
  The correct answer is D .
• Question 1728: Which of the following surfaces will absorbs radiant heat energy heat? Options:
  A) white
  B) red
  C) black
  D) blue
  Show Answer
  The correct answer is C .
• Question 1729: The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms^-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen? Options:
  A) the car will be able to stop immediately the driver notices the dog
  B) the car will stop 3pm after hitting the dog
  C) the car will stop 20m in front of the dog
  D) the driver will quickly reverse the car
  E) the car will stop 5m beyound the dog
  Show Answer
  The correct answer is C .
• Question 1730: A perfect emitter or absorber of radiant energy is a Options:
  A) conductor
  B) black body
  C) white body
  D) red body
  Show Answer
  The correct answer is B .