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Physics Past Questions and Answers

Jamb Physics Questions

Question 36:

The bond between silicon and germanium is

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A Covalent
B Ionic
C Dative
D Electrovalent

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Question 37:

A radioactive isotope has a decay constant of 10^-5s⁴. Calculate half life

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A 6.93 x 10⁵s
B 6.93 x 10⁵s
C 6.93 x10⁴s
D 6.93 x 10⁴s

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Question 38:

The electrical properties of germanium can be altered drastically by the addition of impurity. This process is referred to as

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A Saturation
B Bonding
C Amplification
D Dopping

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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]

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A 8.58 x 10^-19 J
B 8.50 x 10^-15 J
C 8.58 x 10^-17 J
D 8.85 x 10^-18

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Question 40:

Which of the following will be applied when a metal Y is used to electroplate another metal X in electrolysis?

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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

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