LAST 13 YEAR NUMERICAL (CHAPTER 15)

by • 28/05/2012 • 2nd Year PhysicsComments (0)1025

1995

Q) A galvanometer of resistance 60Ω give full scale deflection with a current of 4mA, a resistance of 10940Ω is connected in series with the coil to covert it into voltmeter; find the range of voltmeter obtained.

 

(44volt)

1997

A moving coil galvanometer has a resistance o 25 Ω and its gives a full scale deflection for a potential difference of 50mV. If galvanometer is to be converted into a voltmeter, reading up to a 50 volt. What should be the resistance of the series resistor?

 

(249975 Ω)

2000

 

Q) A moving coil galvanometer has a resistance of 50 ohms and it gives a full scale deflection for P.D of 100 mV. If the galvanometer is converted intro an voltmeter reading up to 50 volts. What should be the resistance of series resistor?

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(24950 Ω)

2002 (PE)

 

Q) The coil of galvanometer having a resistance of 50 Ω and current of 500 micro amperes produces full scale deflection in it. Compute:

1) The shunt required to convert it onto an ammeter of 5 ampere.

2) The series resistance required to convert it into a voltmeter 200 volt range.

 

(R3 = 0.995 Ω, Rx = 599950 Ω)

 

2003(PM)

Q) n ammeter deflects full scale with a current of 5 ampere and has a total resistance of 0.5 Ω. What shunt resistance must be connected to it to measures full scale current up to 30 amperes?

(0.1 Ω)

2003(PE)

Q) A 300 volts voltmeter has a total resistance of 20 K Ω. What additional resistance is required to convert it into a voltmeter reading up to a maximum of 600 volt?

 (20000 Ω)

2004

 

Q) A 250 volts voltmeter has a total resistance of 20,000 Ω. What additional series resistance must be connected to it to increase its range to 400 volts?

 

(12000 Ω)

 

2006

 

Q) An ammeter deflects full scale deflection with a voltage of 2.5 volts, and has resistance of 0.5 Ω. What small resistance must be connected to measure 20A full scale?

 

(0.166 Ω)

 

2007

 

Q) A 300 volts voltmeter has a total resistance of 20 K Ω. What additional resistance is required to convert it into a voltmeter reading up to a maximum of 600 volts?

 

(20000 Ω)

 

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