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Wednesday, 22 April 2026
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Physics Past Questions and Answers

Jamb 2011 Physics Questions

Question 36:
The bond between silicon and germanium is
  • A Covalent
  • B Ionic
  • C Dative
  • D Electrovalent
View Answer & Explanation
Question 37:
A radioactive isotope has a decay constant of 10-5s4. Calculate half life
  • A 6.93 x 10<sup style='font-size: smaller;'>5</sup>s
  • B 6.93 x 10<sup style='font-size: smaller;'>5</sup>s
  • C 6.93 x10<sup style='font-size: smaller;'>4</sup>s
  • D 6.93 x 10<sup style='font-size: smaller;'>4</sup>s
View Answer & Explanation
Question 38:
The electrical properties of germanium can be altered drastically by the addition of impurity. This process is referred to as
  • A Saturation
  • B Bonding
  • C Amplification
  • D Dopping
View Answer & Explanation
Question 39:
If the threshold frequency for tungsten is 1.3 x 1015Hz, what is its work function?
[H = 6.6 x 10-34 Js]
  • A 8.58 x 10<sup style='font-size: smaller;'>-19</sup> J
  • B 8.50 x 10<sup style='font-size: smaller;'>-15</sup> J
  • C 8.58 x 10<sup style='font-size: smaller;'>-17</sup> J
  • D 8.85 x 10<sup style='font-size: smaller;'>-18</sup>
View Answer & Explanation
Question 40:
Which of the following will be applied when a metal Y is used to electroplate another metal X in electrolysis?
  • A X is the anode and very high current is used
  • B X is the anode and Y is the cathode
  • C Y is the cathode and X is the anode
  • D Y is the anode and very high current is used
View Answer & Explanation