Bissoy.com
Doctors Medicines MCQs Q&A

What is the principal on which MCB (Miniature circuit breaker) works ?

What is the principal on which MCB (Miniature circuit breaker) works ? Correct Answer Magnetic effect of electric current

MCB (Miniature circuit breaker) works on magnetic effect of electric current. When there is overflow of electric current, it creates a magnetic field that repels the magnet present in the switch. This repulsion breaks the circuit and restricts the flow of current.

Related Questions

A type of circuit breaker which can work up to 15 kV and the rupturing capacity of that circuit breaker is 2500 MVA. Determine the type of circuit breaker mentioned in the context and shown in the given figure.
It is a circuit breaker in which the heat generated by the high current in the medium between the contacts is sufficient to ionize the medium. Which medium is used in the circuit breaker?
In the following sentence the word principal' occurs three times "The principal (1) aim of the principal (2) of the college was to help build new roads to link the area's principal (3)schools" Indicate the use(s) in which the meaning of the word “Principal is ‘chief or main',
Statements followed by some conclusions are given below. Statements:  A. Ravi works more than Meera, who works 8 hours per day. B. Yuvi works 9 hours per day, which is 1 hour less than Ravi. Conclusions: I. Ravi works 8 hours. II. Yuvi and Ravi per day both works more than Meera. Find which of the given conclusions logically follow from the given statements.  A. Only conclusion I follows. B. Only conclusion II follows. C. Both I and II follow. D. Neither I nor II follows.
Q.(1-4): Answer the questions on the basis of the information given below. * F,G and H are insurance companies , Q,R,S and T are private detectives .Each detective works for at least one of the insurance companies. * Q always works for F and at least one of the other companies. Some of the time G employs only one of these detectives,' the rest of the time it employs exactly two of them. *F and H each employ exactly two of these detectives all the time. If R works for H only, and if S works for G and H only, T works for--
Consider the following statements regarding 'Life in Miniature' project: 1.Google Arts & Culture will be a digital partner in this project. 2.Miniature paintings of tribal artisans will get exposure under this project. Which of the above statements are correct?
A circuit breaker is a piece of equipment which can (i) make or break a circuit either manually or by remote control under normal conditions. (ii) break a circuit automatically under fault conditions. (iii) make a circuit either manually or by remote control under fault conditions Choose the correct answer. 
Which of the following statements are true? (i) The principal focus of a converging lens is real. (ii) The principal focus of a diverging lens is virtual. (iii) The principal focus of a lens is always along the principal axis.
Given below are four statements- (p) The second principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (q) The second principal focus of a lens is the position of the image, real or virtual whose object is at infinity. (r) The first principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (s) The first principal focus of a lens is the position of the image, real or virtual whose object is at infinity.  Examine the above statements and find which among then are correct. 
A, B, C, D and E are five different persons who work in different companies - HCL, IBM, Wipro, Dell and Convergys (but not necessarily in the same order). A and D do not work in Dell. C neither works in IBM nor in HCL. E works in Wipro. B neither works in Convergys nor in Dell. D neither works in Convergys nor in IBM? Which of the following combination is not correct?