Moving Coil Galvanometer & Its Applications
PHXII04:MOVING CHARGES AND MAGNETISM

362985 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \(50 \%\). The percentage change in voltage sensitivity of the galvanometer will be

1 \(0 \%\)
2 \(50 \%\)
3 \(75 \%\)
4 \(100 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

362986 For a moving coil galvanometer, the deflection in the coil is \(0.05\,rad\) when a current of \(10\;mA\) is passed through it. If the torsional constant of suspension wire is \(4.0 \times {10^{ - 5}}Nm\,ra{d^{ - 1}}\), the magnetic field is \(0.01\;T\) and the number of turns in the coils is 200 , the area of each turn (in \(c{m^2}\)) is

1 2.0
2 1.0
3 1.5
4 0.5
PHXII04:MOVING CHARGES AND MAGNETISM

362987 A galvanometer of resistance \(3663 \Omega\) gives full scale deflection for a certain \(I_{\mathrm{g}}\). Calculate the value of the resistance of the shunt which, when joined to the galvanometer coil will result in 1/ 34 of the total current passing through the galvanometer. Also the total resistance of the galvanometer and shunt will be

1 \(111 \Omega, 107.7 \Omega\)
2 \(110\,\Omega ,5\,\Omega \)
3 \(112{\mkern 1mu} \,\Omega ,105.7\,{\mkern 1mu} \Omega \)
4 \(112\,\Omega ,112\,\Omega \)
PHXII04:MOVING CHARGES AND MAGNETISM

362988 A current of \(200\,\mu A\) deflects the coil of a moving coil galvanometer through \(60^\circ .\) The current to cause deflection through \(\dfrac{\pi}{10}\) radian is :

1 \(180\,\mu A\)
2 \(120\,\mu A\)
3 \(30\,\mu A\)
4 \(60\,\mu A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362985 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \(50 \%\). The percentage change in voltage sensitivity of the galvanometer will be

1 \(0 \%\)
2 \(50 \%\)
3 \(75 \%\)
4 \(100 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

362986 For a moving coil galvanometer, the deflection in the coil is \(0.05\,rad\) when a current of \(10\;mA\) is passed through it. If the torsional constant of suspension wire is \(4.0 \times {10^{ - 5}}Nm\,ra{d^{ - 1}}\), the magnetic field is \(0.01\;T\) and the number of turns in the coils is 200 , the area of each turn (in \(c{m^2}\)) is

1 2.0
2 1.0
3 1.5
4 0.5
PHXII04:MOVING CHARGES AND MAGNETISM

362987 A galvanometer of resistance \(3663 \Omega\) gives full scale deflection for a certain \(I_{\mathrm{g}}\). Calculate the value of the resistance of the shunt which, when joined to the galvanometer coil will result in 1/ 34 of the total current passing through the galvanometer. Also the total resistance of the galvanometer and shunt will be

1 \(111 \Omega, 107.7 \Omega\)
2 \(110\,\Omega ,5\,\Omega \)
3 \(112{\mkern 1mu} \,\Omega ,105.7\,{\mkern 1mu} \Omega \)
4 \(112\,\Omega ,112\,\Omega \)
PHXII04:MOVING CHARGES AND MAGNETISM

362988 A current of \(200\,\mu A\) deflects the coil of a moving coil galvanometer through \(60^\circ .\) The current to cause deflection through \(\dfrac{\pi}{10}\) radian is :

1 \(180\,\mu A\)
2 \(120\,\mu A\)
3 \(30\,\mu A\)
4 \(60\,\mu A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362985 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \(50 \%\). The percentage change in voltage sensitivity of the galvanometer will be

1 \(0 \%\)
2 \(50 \%\)
3 \(75 \%\)
4 \(100 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

362986 For a moving coil galvanometer, the deflection in the coil is \(0.05\,rad\) when a current of \(10\;mA\) is passed through it. If the torsional constant of suspension wire is \(4.0 \times {10^{ - 5}}Nm\,ra{d^{ - 1}}\), the magnetic field is \(0.01\;T\) and the number of turns in the coils is 200 , the area of each turn (in \(c{m^2}\)) is

1 2.0
2 1.0
3 1.5
4 0.5
PHXII04:MOVING CHARGES AND MAGNETISM

362987 A galvanometer of resistance \(3663 \Omega\) gives full scale deflection for a certain \(I_{\mathrm{g}}\). Calculate the value of the resistance of the shunt which, when joined to the galvanometer coil will result in 1/ 34 of the total current passing through the galvanometer. Also the total resistance of the galvanometer and shunt will be

1 \(111 \Omega, 107.7 \Omega\)
2 \(110\,\Omega ,5\,\Omega \)
3 \(112{\mkern 1mu} \,\Omega ,105.7\,{\mkern 1mu} \Omega \)
4 \(112\,\Omega ,112\,\Omega \)
PHXII04:MOVING CHARGES AND MAGNETISM

362988 A current of \(200\,\mu A\) deflects the coil of a moving coil galvanometer through \(60^\circ .\) The current to cause deflection through \(\dfrac{\pi}{10}\) radian is :

1 \(180\,\mu A\)
2 \(120\,\mu A\)
3 \(30\,\mu A\)
4 \(60\,\mu A\)
PHXII04:MOVING CHARGES AND MAGNETISM

362985 The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by \(50 \%\). The percentage change in voltage sensitivity of the galvanometer will be

1 \(0 \%\)
2 \(50 \%\)
3 \(75 \%\)
4 \(100 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

362986 For a moving coil galvanometer, the deflection in the coil is \(0.05\,rad\) when a current of \(10\;mA\) is passed through it. If the torsional constant of suspension wire is \(4.0 \times {10^{ - 5}}Nm\,ra{d^{ - 1}}\), the magnetic field is \(0.01\;T\) and the number of turns in the coils is 200 , the area of each turn (in \(c{m^2}\)) is

1 2.0
2 1.0
3 1.5
4 0.5
PHXII04:MOVING CHARGES AND MAGNETISM

362987 A galvanometer of resistance \(3663 \Omega\) gives full scale deflection for a certain \(I_{\mathrm{g}}\). Calculate the value of the resistance of the shunt which, when joined to the galvanometer coil will result in 1/ 34 of the total current passing through the galvanometer. Also the total resistance of the galvanometer and shunt will be

1 \(111 \Omega, 107.7 \Omega\)
2 \(110\,\Omega ,5\,\Omega \)
3 \(112{\mkern 1mu} \,\Omega ,105.7\,{\mkern 1mu} \Omega \)
4 \(112\,\Omega ,112\,\Omega \)
PHXII04:MOVING CHARGES AND MAGNETISM

362988 A current of \(200\,\mu A\) deflects the coil of a moving coil galvanometer through \(60^\circ .\) The current to cause deflection through \(\dfrac{\pi}{10}\) radian is :

1 \(180\,\mu A\)
2 \(120\,\mu A\)
3 \(30\,\mu A\)
4 \(60\,\mu A\)