Bissoy.com
Doctors Medicines MCQs Q&A

Soft iron is used to manufacture electromagnets because its

Soft iron is used to manufacture electromagnets because its Correct Answer Magnetic saturation limit is high and retentivity and coercive force are small

Soft iron is used for electromagnet as we require temporary magnets which should be magnetic as long as current passes through solenoid wound around them and become demagnetised when no current is passed.

Related Questions

Electromagnets are made of soft iron because soft iron have :
Electromagnets are made of soft iron because soft iron has
Which of the following statements are true about soft power?
1. Soft power can be used by state actors.
2. Soft power can be used by non-state actors.
3. Soft power is the second face of power.
4. Soft power is a form of idealism.
Select the correct answer:
The core of an electromagnet is made of soft iron because soft iron has
Which of the following are not chemical changes? 1. Tempering of iron 2. Conversion of the iron piece into an electro-magnet by passing the current around the iron 3. Melting of iron 4. Rusting of iron Select the correct answer using the code given below:
Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is
Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore
Consider the following statements
1. Galvanisation is the method of protecting steel and iron fromrusting by coating them with a thin layer of zinc.
2. Pure iron is very soft but if it is mixed with a small amount of carbon, it becomes hard and strong.
3. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Which of the statements given above are correct?
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Iron is able to take on two crystalline forms (allotropic forms), body-centered cubic, and face-centered cubic, depending on its temperature.  B: Iron is the base metal of steel. C: Because of steel's high tensile strength and low cost, this material is best used in buildings, infrastructure, tools, ships, trains, cars, machines, electrical appliances, and weapons. D: Steel is an alloy of iron and carbon and, sometimes, other elements such as chromium.
Consider the given statement and decide which of the given assumptions is/are implicit in the statement. Statement : 'Installing a soft-drink vending machine on the school campus is a bad idea.' A parent speaking in a parents-teacher meeting. Assumptions: I. The parent believes that a vending machine will increase student consumption of soft drinks. II. There is no other way in which students can buy a soft drink when they are in the campus.