Physics 2018 Past Questions | JAMB

Study the following Physics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

11. What type of reaction is represented by the following scheme?

\(_{1} ^{2} X\) + \(_{1} ^{2} Y\)  —–> \(_{2} ^{3} Z\) + \(_{1} ^{0} n\) + energy

  • A. fusion reaction
  • B. fission reaction
  • C. Chain reaction
  • D. Radioactive decay

12. The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

  • A. specific heat capacity
  • B. latent heat
  • C. heat capacity
  • D. internal energy

13. The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5mins, the current must be?

  • A. 6000A
  • B. 100A
  • C. 10A
  • D. 1A

14. Shadows and eclipses result from the

  • A. refraction of light
  • B. reflection of light
  • C. defraction of light
  • D. rectilinear propagation of light

15. Which of the following obeys Ohm’s law?

  • A. all metals
  • B. diode only
  • C. all electrolytes
  • D. glass

16.  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

  • A. I and II only
  • B. I and III only
  • C. II and III only
  • D. I, II and III

17.

In the diagram given the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static

  • A. \(\frac{m_1}{m_2}\)
  • B. \(\frac{m_1g}{m_2}\)
  • C. \(\frac{m_2}{m_1}\)
  • D. \(\frac{m_2g}{m_1}\)

18. Which of the following may be used to explain a mirage?

I. Layers of air near the road surface have varying refractive indices in hot weather
II. Road surfaces sometimes become good reflectors in hot weather
III. Light from the sky can be reflected upwards after coming close to the road surface.

  • A. I and III only
  • B. II and III only
  • C. II only
  • D. I, II and III

19.

In the diagram given if the atmospheric pressure is 760mm, the pressure in the chamber G Is

  • A. 660mm
  • B. 890mm
  • C. 690mm
  • D. 860mm

20. Which of the following has the lowest internal resistance when new?

  • A. Leclanche cell
  • B. Daniell cell
  • C. Torch battery
  • D. Accumulator
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