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Saturday, 15 August 2026
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Physics Past Questions and Answers

Topic: Surface tension

Jamb Physics Questions - Surface tension

Question 6:
The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon.
[e = 1.6 x 10-19c; h = 6.6 x 10-13js]
  • A 1.3 x 10<sup style='font-size: smaller;'>-15</sup> Hz
  • B 3.1 x 10<sup style='font-size: smaller;'>52</sup> Hz
  • C 3.2 x 10<sup style='font-size: smaller;'>-53</sup> Hz
  • D 8.0 x 10<sup style='font-size: smaller;'>14</sup> Hz
View Answer & Explanation
Question 7:
A spring of force constant 500 NM-1 is compressed such that its length shortens by 5cm. The energy stored in the spring is?
  • A 0.625 J
  • B 6.250 J
  • C 62.500 J
  • D 625.000 J
View Answer & Explanation
Question 8:
If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire
  • A 0.75 J
  • B 7.50 J
  • C 75.00 J
  • D 750.00 J
View Answer & Explanation
Question 9:
If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire
  • A 0.75 J
  • B 7.50 J
  • C 75.00 J
  • D 750.00 J
View Answer & Explanation
Question 10:
Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV
  • A -9.20eV
  • B -8.20eV
  • C -2.75eV
  • D -1.75eV
View Answer & Explanation