Physics 2008 Jamb Past Questions and Answers

Question 36 :

• JAMB 2008

When a pure semiconductor is heated, its resistance

A. Increases
B. Decreases
C. Remains the same
D. Increases and then decreases

Question 37 :

• JAMB 2008

I. for current amplification.
II. for voltage stabilization.
III. for power amplification.
IV. as a switch.
which of the above are the uses of transistor?

A. I,II,III and IV
B. I,III, and IV only
C. I, II and III only
D. I,II and IV only

Question 38 :

• JAMB 2008

The dimension of electromotive force are `

A. ML²T^-3I^-1
B. ML²T^-3I^-2
C. M²LT^-2I^-1
D. M²L²T^-1I^-1

Question 39 :

• JAMB 2008

The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

A. 0^o
B. 45^o
C. 90^o
D. 180^o

Question 40 :

• JAMB 2008

A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms^-1. What is the speed, if the force is tripled?

A. 4.0 ms^-1
B. 6.6 ms^-1
C. 12.1 ms^-1
D. 21.0 ms^-1