JAMB Physics 2010 Objective — Question 45

Question 45 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2010 Objective paper, with the correct answer and a full explanation.

45. In a discharge tube, most of the gas is pumped out so that electricity is conducted at A. a steady voltage B. low pressure C. high pressure D. low voltage

A. a steady voltage
B. low pressureCorrect
C. high pressure
D. low voltage

Explanation

In a discharge tube, most of the gas is pumped out so that electricity is conducted at low pressure. Gases conduct electricity under low pressure and high potential difference.

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