Advertisements
Advertisements
प्रश्न
How is current sensitivity increased?
Briefly describe how the current sensitivity of a moving coil galvanometer can be increased.
Advertisements
उत्तर
A moving coil galvanometer's sensitivity can be enhanced by increasing the number of turns in the coil, the area of the coil, and the magnetic field, while decreasing the couple per unit twist of the suspension.
APPEARS IN
संबंधित प्रश्न
Show that the current flowing through a moving coil galvanometer is directly proportional to the angle of deflection of coil.
Can a galvanometer as such be used for measuring the current? Explain.
Draw a labelled diagram of a moving coil galvanometer and explain its working. What is the function of radial magnetic field inside the coil?
Why are the pole pieces of a horseshoe magnet in a moving coil galvanometer made cylinder in shape?
Define the term ‘current sensitivity’ of a moving coil galvanometer.
The current sensitivity of a galvanometer is defined as ______.
A multirange voltmeter can be constructed by using a galvanometer circuit as shown in figure. We want to construct a voltmeter that can measure 2V, 20V and 200V using a galvanometer of resistance 10Ω and that produces maximum deflection for current of 1 mA. Find R1, R2 and R3 that have to be used.
A galvanometer coil bas 500 turns and each tum has an average area of 3 × 10-4 m2. If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______.
A galvanometer of resistance 100 Ω gives a full-scale deflection for a potential difference of 200 mV.
- What must be the resistance connected to convert the galvanometer into an ammeter of the range 0-200 mA?
- Determine resistance of the ammeter.
