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

362998 A rectangular coil of size \(3 \times 3\;cm\) consisting of 100 turns carries 0.1\(A\). If it produces a deflection \(10^{\circ}\), in a field of induction 0.1\(T\), the couple per unit twist is

1 \(9 \times {10^{ - 5}}\;N - m/rad\)
2 \(9 \times {10^{ - 2}}\;N - m/\) Degree
3 \(0.9\;N - m/\) Degree
4 \(9 \times {10^{ - 5}}\;N - m/\) Degree
PHXII04:MOVING CHARGES AND MAGNETISM

362999 The current sensitivity of moving coil galvanometer is increased by \(25 \%\). This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be

1 \(+25 \%\)
2 zero
3 \(-50 \%\)
4 \(-25 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

363000 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 \(120\mu \;A\)
2 \(30\mu \;A\)
3 \(180\mu \;A\)
4 \(60\mu \;A\)
PHXII04:MOVING CHARGES AND MAGNETISM

363001 A resistance of \(900\,\Omega \) is connected in series with a galvanometer of resistance \(100\,\Omega \). A potential difference of 1 volt produces 100 division deflection in the galvanometer. Find the figure of merit of galvanometer?

1 \({10^{ - 6}}\;A{\rm{/}}div\)
2 \({10^{ - 4}}\;A{\rm{/}}div\)
3 \({10^{ - 7}}\;A{\rm{/}}div\)
4 \({10^{ - 5}}\;A{\rm{/}}div\)
PHXII04:MOVING CHARGES AND MAGNETISM

362998 A rectangular coil of size \(3 \times 3\;cm\) consisting of 100 turns carries 0.1\(A\). If it produces a deflection \(10^{\circ}\), in a field of induction 0.1\(T\), the couple per unit twist is

1 \(9 \times {10^{ - 5}}\;N - m/rad\)
2 \(9 \times {10^{ - 2}}\;N - m/\) Degree
3 \(0.9\;N - m/\) Degree
4 \(9 \times {10^{ - 5}}\;N - m/\) Degree
PHXII04:MOVING CHARGES AND MAGNETISM

362999 The current sensitivity of moving coil galvanometer is increased by \(25 \%\). This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be

1 \(+25 \%\)
2 zero
3 \(-50 \%\)
4 \(-25 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

363000 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 \(120\mu \;A\)
2 \(30\mu \;A\)
3 \(180\mu \;A\)
4 \(60\mu \;A\)
PHXII04:MOVING CHARGES AND MAGNETISM

363001 A resistance of \(900\,\Omega \) is connected in series with a galvanometer of resistance \(100\,\Omega \). A potential difference of 1 volt produces 100 division deflection in the galvanometer. Find the figure of merit of galvanometer?

1 \({10^{ - 6}}\;A{\rm{/}}div\)
2 \({10^{ - 4}}\;A{\rm{/}}div\)
3 \({10^{ - 7}}\;A{\rm{/}}div\)
4 \({10^{ - 5}}\;A{\rm{/}}div\)
PHXII04:MOVING CHARGES AND MAGNETISM

362998 A rectangular coil of size \(3 \times 3\;cm\) consisting of 100 turns carries 0.1\(A\). If it produces a deflection \(10^{\circ}\), in a field of induction 0.1\(T\), the couple per unit twist is

1 \(9 \times {10^{ - 5}}\;N - m/rad\)
2 \(9 \times {10^{ - 2}}\;N - m/\) Degree
3 \(0.9\;N - m/\) Degree
4 \(9 \times {10^{ - 5}}\;N - m/\) Degree
PHXII04:MOVING CHARGES AND MAGNETISM

362999 The current sensitivity of moving coil galvanometer is increased by \(25 \%\). This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be

1 \(+25 \%\)
2 zero
3 \(-50 \%\)
4 \(-25 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

363000 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 \(120\mu \;A\)
2 \(30\mu \;A\)
3 \(180\mu \;A\)
4 \(60\mu \;A\)
PHXII04:MOVING CHARGES AND MAGNETISM

363001 A resistance of \(900\,\Omega \) is connected in series with a galvanometer of resistance \(100\,\Omega \). A potential difference of 1 volt produces 100 division deflection in the galvanometer. Find the figure of merit of galvanometer?

1 \({10^{ - 6}}\;A{\rm{/}}div\)
2 \({10^{ - 4}}\;A{\rm{/}}div\)
3 \({10^{ - 7}}\;A{\rm{/}}div\)
4 \({10^{ - 5}}\;A{\rm{/}}div\)
PHXII04:MOVING CHARGES AND MAGNETISM

362998 A rectangular coil of size \(3 \times 3\;cm\) consisting of 100 turns carries 0.1\(A\). If it produces a deflection \(10^{\circ}\), in a field of induction 0.1\(T\), the couple per unit twist is

1 \(9 \times {10^{ - 5}}\;N - m/rad\)
2 \(9 \times {10^{ - 2}}\;N - m/\) Degree
3 \(0.9\;N - m/\) Degree
4 \(9 \times {10^{ - 5}}\;N - m/\) Degree
PHXII04:MOVING CHARGES AND MAGNETISM

362999 The current sensitivity of moving coil galvanometer is increased by \(25 \%\). This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coil constant. The percentage change in the voltage sensitivity will be

1 \(+25 \%\)
2 zero
3 \(-50 \%\)
4 \(-25 \%\)
PHXII04:MOVING CHARGES AND MAGNETISM

363000 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 \(120\mu \;A\)
2 \(30\mu \;A\)
3 \(180\mu \;A\)
4 \(60\mu \;A\)
PHXII04:MOVING CHARGES AND MAGNETISM

363001 A resistance of \(900\,\Omega \) is connected in series with a galvanometer of resistance \(100\,\Omega \). A potential difference of 1 volt produces 100 division deflection in the galvanometer. Find the figure of merit of galvanometer?

1 \({10^{ - 6}}\;A{\rm{/}}div\)
2 \({10^{ - 4}}\;A{\rm{/}}div\)
3 \({10^{ - 7}}\;A{\rm{/}}div\)
4 \({10^{ - 5}}\;A{\rm{/}}div\)