Why a moving coil galvanometer is called so? Because the coil moves while the magnet remains fixed. None of these. Because the number of turns of the coil varies with current.
Why is that while using a moving coil galvanometer as an ammeter A shunt is required?
If an ammeter has a very low resistance, it will not affect the resistance of the circuit and so reading will be true. That is why while using a moving coil galvanometer as an ammeter, a shunt (small resistance in parallel) is used.
Why the coil of a moving coil galvanometer is wound on an Aluminium foil?
The coil of a moving coil galvanometer is wound over metallic frame to provide electromagnetic damping so it becomes dead beat galvanometer.
What is the other name of moving coil galvanometer?
Pivoted-coil or Weston galvanometer.
What is the principle of moving coil galvanometer *?
Problem 4: What is the principle of Moving coil galvanometer? Solution: Magnetic torque is experienced when a current-carrying coil is put in an external magnetic field. The angle through which the coil is deflected due to the magnetic torque effect is proportional to the coil’s current magnitude.
What is the principle of the moving coil galvanometer?
A moving coil galvanometer works on the principle that a current-carrying coil placed in a magnetic field, experiences a torque. The coil springs along with the radial field ensure the deflection to be proportional to the strength of the current.
What is the principle of moving coil galvanometer?
Why do we prefer phosphor bronze alloy to make hair springs of the moving coil galvanometer?
The suspension wire of phosphor bronze alloy is preferred in moving coil galvanometer because it has several advantages: (i) Its restoring torque per unit twist is small. (ii) It has great tensile strength so that even if it is thin, it will not break under the weight of the coil suspended from its end.
How the sensitivity of a moving coil galvanometer can be increased?
So, sensitivity of the galvanometer can be increased either by increasing the number of turns (N), using strong magnets or increasing the area of the coil (A). So, the correct answer is that the sensitivity of a moving coil galvanometer can be increased by increasing the number of turns of the coil.
What is the meaning of moving coil galvanometer?
Definitions of moving-coil galvanometer. a galvanometer that is operated by the force exerted by an electric current flowing in a movable coil suspended in a magnetic field. types: ballistic galvanometer. a moving-coil galvanometer that measures electric charge.
What is the difference between galvanometer and moving coil galvanometer?
Moving coil galvanometer is a very sensitive instrument used to measure the small currents of the order 10^-9 A. Here the galvanometer gives the deflection which is proportional to the electric current flowing through it. A galvanometer is an electromechanical instrument for detecting and measuring electric current.
