Jamb Physics 2002 Past Questions and Answers

Question 36:

• JAMB 2002

an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is

A. 1Ω
B. 2Ω
C. 3Ω
D. 4Ω

Question 37:

• JAMB 2002

Na + X → F + He

23	20	4
11	9	2

What particle is X in the reaction above?

A. Alpha
B. Beta
C. Neurons
D. Gamma

Question 38:

• JAMB 2002

Pure silicon can be converted to a p-type by adding a controlled amount of

A. Trivalent atoms
B. Tetravalent atoms
C. Pentavalent atoms
D. Hexavalent atoms

Question 39:

• JAMB 2002

The energy associated with the photon of a radio transmission at 3 x 10⁵ Hz is
[h = 6.63 x 10^-34Js]

A. 2.00 x 10^-28J
B. 1.30 x 10^-28J
C. 2.00 x 10^{- 29}J
D. 1.30 x 10^-29J

Question 40:

• JAMB 2002

The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is

A. 8%
B. 5%
C. 3%
D. 1%