Question

The ratio of maximum current (with shunt) to the full-scale deflection current (without current) in a permanent magnet moving coil instrument is known as
(A) Sensitivity
(B) Multiplying factor
(C) Multiplying power
(D) Both (b) and (c)

Answer 1

Hint We can say that magnetism is a force that can attract (pull closer) or repel (push away) objects that have a magnetic material like iron inside them (magnetic objects). In simpler words, it is a property of certain substances which pull closer or repel other objects. A magnet creates a magnetic field around it. A basic law of magnetism is that unlike poles attract each other. Two bar magnets can illustrate this. One is hung so that it swings freely. A pole of the second is brought, in turn, near each of the two ends of the hanging magnet.

Complete step by step answer
We know that magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges. All moving charged particles produce magnetic fields. Moving point charges, such as electrons, produce complicated but well-known magnetic fields that depend on the charge, velocity, and acceleration of the particles.
We know that the ratio of maximum current (with shunt) to the full-scale deflection current (without current) in a permanent magnet moving coil instrument is known as Multiplying factor or Multiplying power. $(\mathrm{G}+\mathrm{S}) / \mathrm{S}$ is called shunt factor.
If a shunt is connected across galvanometer parallelly and the factor multiplication with galvanometer current results to total current is called shunt factor.

So, the correct option is option D.

Note: We know that all magnets are made of a group of metals called the ferromagnetic metals. These are metals such as nickel and iron. Each of these metals have the special property of being able to be magnetized uniformly. When we ask how a magnet works, we are simply asking how the object we call a magnet exerts its magnetic field. If they are not exposed to any of these conditions, permanent magnets will lose magnetism on their own, however this degradation is very slow, on the order of one percentage point every ten years or so. A magnet is an object or a device that gives off an external magnetic field. Basically, it applies a force over a distance on other magnets, electrical currents, beams of charge, circuits, or magnetic materials. Magnetism can even be caused by electrical currents.