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 691:

  A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

  Options:
  A) 2400 J
  B) 9600 J
  C) 1500 J
  D) 1200 J
  Show Answer
  The correct answer is A .
• Question 692:

  Which of the following statements are TRUE of isotopes?

  I. Isotopes of an element have the same chemical properties because they have the same number of electrons

  II. Isotopes of elements are normally separated using physical properties

  III. Isotopes of an element have the same number of protons in their nuclei

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) I, II and III
  Show Answer
  The correct answer is B .
• Question 693:

  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 694: A short chain is sometimes attached to the back of a petrol tanker to? Options:
  A) generate more friction
  B) ensure the balancing of the tanker
  C) caution the driver when overspeeding
  D) conduct excess charges to the car
  Show Answer
  The correct answer is D .
• Question 695: A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f. Options:
  A) 5.60 v
  B) 24.00 v
  C) 0.24 v
  D) 2.40 v
  Show Answer
  The correct answer is D .
• Question 696: Heat is supplied uniformly at the rate of 100W to 1.0 x 10^-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5^oC, then the specific heat capacity of the liquid is Options:
  A) 2.0 x 10²Jkg^-1k^-1
  B) 2.0 x 10²Jkg^-1
  C) 4.0 x 10⁴Jkg^-1k^-1
  D) 4.0 x 10⁴kg^-1
  E) 8.4 x 10³Jkg^-1k^-1
  Show Answer
  The correct answer is C .
• Question 697: A lamp is rated 240V 60W, calculate the resistance of its filament Options:
  A) 240$\mathrm{\Omega }$
  B) 360$\mathrm{\Omega }$
  C) 960$\mathrm{\Omega }$
  D) 1440$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 698: Calculate the electric field intensity between two plates of potential difference 6.5V when separated by a distance of 35cm. Options:
  A) 18.57NC${}^{-1}$
  B) 53.06NC${}^{-1}$
  C) 2.28NC${}^{-1}$
  D) 0.80NC${}^{-1}$
  Show Answer
  The correct answer is A .
• Question 699: If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is Options:
  A) doubled
  B) reduced to a quarter
  C) reduced by half
  D) constant
  Show Answer
  The correct answer is B .
• Question 700:

  

  In the Fig above, MN is a light uniform meter rule pivoted at O, the 80cm mark. A load of mass 3.0 kg is suspended on the meter rule at L, the 10cm mark. If the rule is kept in equilibrium by a string RP, fixed at P and attached to the rule at R, the 20cm mark, then the Tension T on the string is

  Options:
  A) 30N
  B) 34N
  C) 35N
  D) 60N
  E) 70N
  Show Answer
  The correct answer is E .