Bissoy.com
Doctors Medicines MCQs Q&A

The material that is used to make the core of electromagnets is:

The material that is used to make the core of electromagnets is: Correct Answer Soft iron

CONCEPT:

Electromagnet:

  • An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
  • Electromagnets usually consist of wire wounds into a coil.
  • The magnetism of the electromagnets can be increased by placing a soft iron rod inside the solenoid.
  • The core of electromagnets is made of ferromagnetic materials which have high permeability and low retentivity.
  • Electromagnets are used in electric bells, loudspeakers, and telephone diaphragms.
  • Giant electromagnets are used in cranes to lift machinery, and bulk quantities of iron and steel.


EXPLANATION:

  • The magnetism of the electromagnets can be increased by placing a soft iron rod inside the solenoid.
  • When we switch off the solenoid current, the magnetism is effectively switched off since the soft iron core has a low retentivity. Hence, option 3 is correct.

Related Questions

Which of the following statements is/are correct? A. Fraternity is a core value of the Indian Constitution. B. It is a core value because it is explicitly mentioned in Part III of the Indian Constitution. C. It is not a core value of the Indian Constitution because it is not mentioned in the Constitution of India. D. It is a core value because it is a part of the Preamble and has been held to be part of the basic structure of the Constitution.
Consider the following with respect to the term 'Core Inflation': A) Core Inflation is the inflation rate of a particular basket of commodities. B) Core Inflation is the sudden increase in prices of certain items of food grains.C) Core inflation is caused by supply shock in certain essential commodities.
What material is used for the construction of core of electromagnets?
Each of the question below consists of a question and three statements number I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question. Two person X and Y together can make 25% of total number of bricks in 4.8 days. Another person Z can make 50 bricks in a day. What is the time taken by person X and Z together to make the total number of bricks? I. Dimensions of a brick is (3cm × 4cm × 5cm) while the dimension of a cuboids when all the bricks are put together is (72cm × 80cm × 50cm) and ratio of number of days taken by X and Y alone to make the total number of bricks is 3 : 2. II. The total number of bricks is 4800 and person Y can make 150 bricks in day. III. Total volume of all the bricks together is 1.008m3 and dimension of a bricks is (5cm × 6cm × 7cm) and time taken by Z to make total number of bricks is 200 % more than the total time taken by person Y to make total number of bricks.
Core of electromagnets are made of ferromagnetic material which has
A solenoid has a core of a material with relative permeability 400. The windings are insulated from the core and the magnetic Intensity is 1500 A/m. What is the Magnetization of the core?
are used for construction of core of electromagnets.
The armature core of the DC machine houses the conductor in the slot and provides an easy path for magnetic flux. A specific material is used for the construction of the armature core so that hysteresis loss can be minimized. What is that material?
What should be the properties of the core of electromagnets?
Core of electromagnets are made up of ____________