Gases - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 2012

A gas would serve as an electrical conductor under

A. Reduced pressure and high current
B. Increased magnetic field
C. Reduced pressure and reduced potential
D. Exposure to visible light

Question 7:

• JAMB 2012

I. Low pressure.
II. High pressure.
III. High p.d.
IV. Low p.d.
Which combination of the above is true of the conduction of electricity through gases?

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

Question 8:

• JAMB 2012

I. Low pressure.
II. High pressure.
III. High p.d.
IV. Low p.d.
Which combination of the above is true of the conduction of electricity through gases?

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

Question 9:

• JAMB 2014

Which gas produces a pink coloured light in a discharge tube?

A. Mercury
B. Argon
C. Air
D. Neon

Question 10:

• JAMB 2017

Under what conditions are cathode rays produced in a discharge tube?

A. High pressure and low voltage
B. High pressure and high voltage
C. Low pressure and low voltage
D. Low pressure and high volatge