Electric Cells - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1979

In an electrolysis experiment, a cathode of mass 5g is found o weigh 5.01g after a current of 5A flows for 50 seconds. What is the electrochemical equivalent of the deposited substance?

A. 0.00004g/C
B. 0.00002g/C
C. 0.02500g/C
D. 0.05000g/C
E. 0.00001g/C

Question 3:

• JAMB 1984

Which of the following components is NOT contained in a dry cell? A

A. Carbon rod
B. Paste of magnesium dioxide
C. Paste of ammonium chloride
D. Zinc case
E. Copper rod

Question 4:

• JAMB 1985

Which of the following statements about electrolysis is NOT correct?

A. The substances in solution in the electrolyte become ionized
B. Ions are electrically charged and are attracted towards electrodes when a potential difference is applied
C. Ions may be discharged at the electrodes, forming bubbles or deposits
D. The mass deposited depends upon the length of time for which current flows
E. The mass of gas set free or metal deposited is proportional to the square of the current

Question 5:

• JAMB 1986

Which of the following is stored by a dry Leclanche cell?

A. Electrical power
B. Kinetic energy
C. Electric current
D. Chemical energy