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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Use of Simple beam balance

Jamb Physics Questions - Use of Simple beam balance

Question 6:
The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is
  • A 0.0378 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • B 0.227 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • C 0.378 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • D 0.595 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • E 2.268 x 10 <sup style='font-size: smaller;'>-3</sup>kg
View Answer & Explanation
Question 7:
Which of the following statements are true about the spring balance and the chemical balance? i. both are used to measure the mass of an object. ii. either of them may be used to measure the weight of an object. iii. the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. iv. a change in gravity does the readings of a spring balance but not that of a chemical balance.
  • A I, and iv
  • B Ii and iii
  • C Ii and iv
  • D I, ii and iii
  • E I and iii
View Answer & Explanation
Question 8:
When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?
  • A 1.10\(\Omega\)
  • B 1.64\(\Omega\)
  • C 2.44\(\Omega\)
  • D 27.50\(\Omega\)
View Answer & Explanation
Question 9:
A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the 30cm-mark. where will a force of 2N be placed from the pivot to balance the meter rule?
  • A 95cm
  • B 25cm
  • C 20cm
  • D 5cm
View Answer & Explanation
Question 10:
A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is
[g = 10ms-2]
  • A 40 N
  • B 80 N
  • C 120 N
  • D 160 N
View Answer & Explanation