Physics 2007 Jamb Past Questions and Answers

Question 21 :

• JAMB 2007

When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a?

A. Simple microscope
B. Refecting lens
C. Compound microscope
D. Projector

Question 22 :

• JAMB 2007

The production of pure spectrum could easily be achieved using a?

A. Glass prism with a pin
B. Triangular prism with two convex lens
C. Traingular prism only
D. Triangular prism with two concave lenses

Question 23 :

• JAMB 2007

A charge 50 µc has electric field strength of 360 NC-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is?

A. 864 NC^-1
B. 150 NC^-1
C. 144 NC^-1
D. 18 NC^-1

Question 24 :

• JAMB 2007

The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is?
[h = 6.63 x 10^-34js, c = 3 x 10⁸ ms^-1]

A. 6.6 X 10^-28
B. 1.99 X 10^-27
C. 6.60 x 10^-26
D. 1.99 x 10^-25

Question 25 :

• JAMB 2007

The bond that forms a semiconductor is?

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