Jamb Physics 2006 Past Questions and Answers

Question 26:

• JAMB 2006

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^-15 Hz
B. 3.1 x 10⁵² Hz
C. 3.2 x 10^-53 Hz
D. 8.0 x 10¹⁴ Hz

Question 27:

• JAMB 2006

The process through which free electrons leave the surface of hot metal is known as?

A. Photon emission
B. Photo emission
C. Thermionic emission
D. Electron emission

Question 28:

• JAMB 2006

The battery connection that permits current to flow across a p-n junction is called?

A. Reverse baised
B. Forward baised
C. Amplification.
D. Rectification

Question 29:

• JAMB 2006

One of the properties of gamma rays is that they are?

A. Neutral
B. Massive
C. Positively charged
D. Negatively charged

Question 30:

• JAMB 2006

A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?

A. (15)/16
B. (1)/16
C. (3)/4
D. (1)/4