Jamb Physics 2009 Past Questions and Answers

Question 26:

• JAMB 2009

The ability of the human eye to focus object on the retina is referred to as the power of

A. Interference
B. Diffraction
C. Accomodation
D. Superposition

Question 27:

• JAMB 2009

Which of the following is a secondary colour

A. Blue
B. Orange
C. Red
D. Green

Question 28:

• JAMB 2009

If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will

A. Close up
B. Become positively charged
C. Become negatively charged
D. Open further

Question 29:

• JAMB 2009

An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?

A. 3.86 x 10⁵J
B. 3.56 x 10⁵J
C. 1.80 x 10⁴J
D. 2.16 x 10⁵J

Question 30:

• JAMB 2009

A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f.

A. 5.60 v
B. 24.00 v
C. 0.24 v
D. 2.40 v