Jamb Physics 2010 Past Questions and Answers

Question 66:

• JAMB 2010

In a discharge tube, most of the gas is pumped out so that electricity is conducted at

A. Low voltage
B. Steady voltage
C. High pressure
D. Low pressure

Question 67:

• JAMB 2010

The ground stated energy for the hydrogen atom is 5.44 x 10^-19J . If an electron drops from zero energy to ground state, calculate the frequency of the emitted radiation.
[h = 6.6 x 10^-34 Js]

A. 5.0 x 10¹⁶ Hz
B. 2.0 x 10¹⁶ Hz
C. 5.0 x 10¹⁵ Hz
D. 2.0 x 10¹⁵ Hz
E. No correct option

Question 68:

• JAMB 2010

Transistors are used for the

A. Rectification of signals
B. Conversion of a.c to d.c
C. Amplification of signals
D. Conversion of d.c to a.c

Question 69:

• JAMB 2010

Which of the following is a pure semiconductor?

A. Carbon
B. Silicon
C. Transistor
D. Phosphorus

Question 70:

• JAMB 2010

The diagram above shows a velocity - time graph. The statement that is true about this motion is that the car

A. Has no acceleration between point F and G
B. Decelerates between F and H
C. Has a constant soeed between points E and F
D. Accelerates between points F and G