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Monday, 02 November 2026
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Physics Past Questions and Answers

Jamb 1989 Physics Questions

Question 36:
The fig above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure
  • A Q
  • B R
  • C A point between P and R
  • D A point between R and S
View Answer & Explanation
Question 37:
A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree
  • A MgR sinθ
  • B MgR (1- cos θ)
  • C MgR
  • D MgR (1 - sinθ)
View Answer & Explanation
Question 38:
A block of mass m is held in equilibrium against a vertical wall by a horizontal force. If the coefficient of friction between the wall and the block is µ, the minimum value of the horizontal force is
  • A µmg
  • B (1-µ)mg
  • C (1+µ)mg
  • D Mg/µ
View Answer & Explanation
Question 39:
In the fig above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load?
[g = 10ms-2]
  • A 6.0 x 10<sup style='font-size: smaller;'>-5</sup>mN<sup style='font-size: smaller;'>-1</sup>
  • B 2.5 x 10<sup style='font-size: smaller;'>-4</sup>mN<sup style='font-size: smaller;'>-1</sup>
  • C 6.0 x 10 <sup style='font-size: smaller;'>-3</sup>mN<sup style='font-size: smaller;'>-1</sup>
  • D 2.5 x 10 <sup style='font-size: smaller;'>-2</sup>mN<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 40:
The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be
  • A Stationary and transverse
  • B Stationary and longitudinal
  • C Progressive and transverse
  • D Progressive and longitudinal
View Answer & Explanation