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 531:

  When light of a certain frequency is incident on a metal surface, no photoelectrons are emitted. If the frequency of the light is increased, what happens to the stopping potential?

  Options:
  A) The stopping potential does not change.
  B) The stopping potential decreases.
  C) The stopping potential can either increase or decrease, depending on the intensity of the light.
  D) The stopping potential increases.
  Show Answer
  The correct answer is D .
• Question 532: Which is a fundamental unit? Options:
  A) ampere
  B) joule
  C) Newton
  D) ohm
  E) watt
  Show Answer
  The correct answer is A .
• Question 533: A generator is on daily use and in the process, ten 60 W and five 40 W tungsten bulbs are on for the same time interval. the energy consumed daily is? Options:
  A) 0.96 kWh
  B) 19.2 kWh
  C) 9.60 kWh
  D) 19.20 kWh
  Show Answer
  The correct answer is B .
• Question 534: A temperature 20^oC is the same as Options:
  A) 36^oF
  B) 60^oF
  C) 11.1^oF
  D) 43.1^oF
  E) 25^oF
  Show Answer
  The correct answer is B .
• Question 535: The force experienced by an object of mass 60.0kg in the moon's gravitational field is 1.002 x 10²N. What is the intensity of the gravitational field? Options:
  A) 0.60Nkg^-1
  B) 1.67Nkg^-1
  C) 6.12 x 10²Nkg^-1
  D) 9.81ms^-2
  Show Answer
  The correct answer is B .
• Question 536: Cancerous cells can be destroyed by Options:
  A) ultraviolet rays
  B) alpha particules
  C) x - rays
  D) infrared rays
  Show Answer
  The correct answer is C .
• Question 537: How much heat is required to convert 5.0g of ice at 0 ° C to water at the boiling point? (Specific latent heat of ice = 336Jg^-1 specific heat capacity of water = 4.2Jg^-1K^-1) Options:
  A) 420 J
  B) 1680 J
  C) 1701 J
  D) 2100 J
  E) 3780 J
  Show Answer
  The correct answer is E .
• Question 538: A room is heated by means of a charcoal fire, An occupant of the room standing away from the fire is warmed mainly by Options:
  A) convection
  B) radiation
  C) conduction
  D) reflection
  Show Answer
  The correct answer is B .
• Question 539:
  

  Consider the three forces acting at O and in equilibrium as shown in the figure. Which of the following equations is/are CORRECT?

  I.P${}_1$ cos${\theta }_1$ = p${}_1$ cos ${\theta }_2$

  II. P${}_3$ = P${}_1$ cos ${\theta }_4$ + P${}_{2}co{s}_2$

  III. P${}_1\sin {\theta }_1=P_2\sin {\theta }_2$

  Options:
  A) I only
  B) II only
  C) III only
  D) I, II and III only
  Show Answer
  The correct answer is C .
• Question 540:

  I. Coherence

  II. Same frequency

  III. Same wavelength

  IV. Same IntensityWhich of the conditions above are necessary to produce interference fringes?

  Options:
  A) I and III
  B) I, II and IV
  C) I, II and III
  D) II and III
  Show Answer
  The correct answer is C .