Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 106:

• JAMB 2007

The bond that forms a semiconductor is?

A. Covalent
B. Electrovalent
C. Ionic
D. Metallic

Question 107:

• JAMB 2007

During the nuclear reaction described by W → X→ Y

235	235	231
92	93	91

the particles emitted are respectively

A. α and α
B. α and β
C. β and β
D. β and α

Question 108:

• JAMB 2008

caesium has a work function of 3 x 10^-19J. the maximum energy of liberated electrons when it is illuminated by light of frequency 6.7 x 10¹⁴
HZ is?
[h = 6.6 x 1010^-34Js]

A. 1.42 x 10^-19J
B. 3.00 x 10^-19J
C. 4.42 x 1010^-19J
D. 7.42 x 10^-19J

Question 109:

• JAMB 2008

zener diode is used for?

A. Current amplification
B. Power amplification
C. Voltage regulation
D. Energy conversion

Question 110:

• JAMB 2008

If electron are accelerated from rest through a potential difference of 10kv, what is the wavelength of the associated electron
[m = 9.1 x 10^-31kg, e = 1.6 x 10^-19C, h = 6.6 x 10^-34js]

A. 1.22 x 10^-11m
B. 3.87 x 10^-10m
C. 2.27 x 10¹¹m
D. 2.27 x 10¹⁴m