What is a moving coil galvanometer?
What is a moving coil galvanometer?
A moving coil galvanometer is an instrument which is used to measure electric currents. It is a sensitive electromagnetic device which can measure low currents even of the order of a few microamperes. Moving-coil galvanometers are mainly divided into two types: Suspended coil galvanometer.
What is the basic principle of a moving coil galvanometer derive an expression?
Solution : Moving coil galvanometer principle Its working is based on the fact that when a current carrying coil is placed in a magnetic field, it experiences a torque, the magnitude of It depends on the strength of current.
What is galvanometer explain?
galvanometer, instrument for measuring a small electrical current or a function of the current by deflection of a moving coil. The deflection is a mechanical rotation derived from forces resulting from the current.
What does moving coil mean?
Definition of moving-coil 1 : operated by the force exerted upon a movable electric-current-carrying coil suspended in a magnetic field a moving-coil galvanometer.
What is moving coil galvanometer 12?
Moving coil galvanometer is an electromagnetic device that can measure small values of current. It is also known as Weston galvanometer.
What is the principle of moving coil galvanometer Mcq?
Explanation: Moving coil galvanometer uses the principle that a current-carrying coil is placed in the magnetic field experiences torque.
What is the symbol of galvanometer?
There are 2 symbols for galvanometer: -Here the alphabet G signifies galvanometer. -Here the arrow mark signifies the needle present in the galvanometer. There is no specific positive or negative side to it.
What is the unit of galvanometer?
The SI unit of current sensitivity of galvanometer is division/ampere (or) radian/ampere.
What is galvanometer PDF?
A galvanometer is a device that is used to detect small electric current or measure its magnitude. The current and its intensity is usually indicated by a magnetic needle’s movement or that of a coil in a magnetic field that is an important part of a galvanometer.
What is the principle of moving coil instrument?
Permanent Magnet Moving Coil Instrument (PMMC): It works on the principle that the force acting on the coil places between the magnetic field of the permanent magnet. And because of this magnetic field, the coil rotates.
What is moving coil ammeter?
Moving Coil Ammeter (MI) – The MI ammeter measures both the alternating and direct current. In this type of ammeter, the coil freely moves between the poles of a permanent magnet. When the current passes through the coil, it starts deflecting at a certain angle.