Question
When the current through the electromagnet of a relay reaches a particular value

Answer

  1. Both A or C
Explanation:
They are ways of switching using a low current to use an electromagnet to close or open a spring steel contact.They are often used to isolate a user from a high voltage that needs to be switched, using low current, low voltage to operate the relay, rather than having a user come in direct proximity to the higher voltage that needs to be switched.When the current through the electromagnet of a relay reaches a particular value it either breaks the circuit by repllening or closes the circuit by pulling in an iron contact.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Semiconductor is damaged by the strong current due to(a) Lack of free electron(b) Excess of electrons(c) Excess of proton(d) None of these
   
   
Conditions of diffraction is
The resistance coils in a resistance box are made of double folded wire so that their.
The photo-electrons emitted from a surface of sodium metal are such that         (a) They all are of the same frequency(b) They have the same kinetic energy(c) They have the same de Broglie wavelength(d) They have their speeds varying from zero to a certain maximum
 
 
 
 
A square current loop is suspended in a uniform magnetic field which is located at its base. If force on one arm of the loop is $\vec{F}$. Then the resultant force on rest three arms is :
If a positive charge is taken from a region of lower potential to a region of higher potential, then the electrical potential energy:
Two similar bar magnets $P$ and $Q,$ each of magnetic moment $M,$ are taken, If $P$ is cut along its axial line and $Q$ is cut along its equatorial line, all the four pieces obtained have
The magnitude of magnifying power of an astronomical telescope is $5,$ the focal power of its eyepiece is $10$ diopters. The focal power of its objective $($in diopters$)$ is$:$
Curie temperature is the temperature above which:
Consider the following two statements:
  1. The linear momentum of a particle is independent of the frame of reference.
  2. The kinetic energy of a particle is independent of the frame of reference.
  1. Both A and B are true.
  2. A is true but B is false.
  3. A is false but B is true.
  4. Both A and B are false.