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Sunday, 24 May 2026
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Physics Past Questions and Answers

Jamb 2020 Physics Questions

Question 31:
Two divers G and H are at depths 20m and 40m, respectively below the water surface in a lake. The pressure on G is O\(_1\) while the pressure on H is P\(_2\), If the atmospheric pressure is equivalent to 10m of water, then the value of P\(_2\)/P\(_1\) is
  • A 0.50
  • B 0.60
  • C 1.67
  • D 2.00
View Answer & Explanation
Question 32:
[examqimage]https://www.schoolngr.com/eattachments/88313388eb2ae9baf4549b6a4938628e46c9342a[/examqimage] The figure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40\(^o\), then the value of W is
  • A 28.0N
  • B 48.0N
  • C 288.0N
  • D 50.0N
View Answer & Explanation
Question 33:
[examqimage]https://www.schoolngr.com/eattachments/43f40c75143370cd2f275cefe7a77f46d4f19461[/examqimage] In an experiment in which molten naphthalene is allowed to cool, the cooling curve i n the figure was obtained. The temperature 80\(^o\)C is known as the
  • A Cooling temperature
  • B Boiling point
  • C Melting point
  • D Vaporization point
View Answer & Explanation
Question 34:
[examqimage]https://www.schoolngr.com/eattachments/3580c26c9f37022475a094f5b6187acfe436a2af[/examqimage] In the figure, the value of R is
  • A 3\(\Omega\)
  • B 6\(\Omega\)
  • C 4\(\Omega\)
  • D 5\(\Omega\)
View Answer & Explanation
Question 35:
Which of the following instruments consumes the highest current? [table][tr][td]I. Electric iron[/td][td]250v[/td][td]1kW[/td][/tr][tr][td]II. Television set[/td][td]220v[/td][td]110W[/td][/tr][tr][td]III. Torch light[/td][td]6v[/td][td]30W[/td][/tr][tr][td]IV. Immersion heater[/td][td]110v[/td][td]500W[/td][/tr][/table]
  • A I
  • B II
  • C III
  • D IV
View Answer & Explanation