Conversion Of Galvanometers To Ammeters And Voltmeter Using Shunts And Multipliers - Physics Jamb 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

Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing

A. A larger number of turns in the coil
B. A thinner suspension with a small torsional control
C. A special alloy permanent magnet which gives a high magnetic flux
D. All of the above
E. A light source with a greater intensity

Question 3 :

• JAMB 1992

The maximum permissible current through a galvanometer G of internal resistance 10\(\Omega\) is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G

A. 20,000 ohms in parallel
B. 19,990 ohms in series
C. 1990 ohms in series
D. 100 ohms in series

Question 4 :

• JAMB 1995

Which of the following is required to convert a milliammeter to an ammeter?

A. A high resistance in parallel
B. A high resistance in series
C. A low resistance in parallel
D. A low resistance in series

Question 5 :

• JAMB 1997

A galvanometer of internal resistance 50\(\Omega\) has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V?

A. 1750\(\Omega\)
B. 1950\(\Omega\)
C. 2000\(\Omega\)
D. 2500\(\Omega\)