The core of an electromagnet is made of soft iron because soft iron has

An electromagnet crane is carrying the electromagnet with the help of the three cables. But the electromagnet is not stable because of the wind. What is science behind the cause?

A

The wind is making the net force of the body equal to a non-zero value

B

The wind is making the net force of the body equal to zero value

C

The wind is making the net force of the body equal to a non-zero value but is supporting the equilibrium

D

The wind is making the net force of the body equal to zero value and supporting equilibrium

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.

A

A and B only

B

A and D only

C

C only

D

A, B and D only

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:

A

1, 2 and 4

B

2, 3 and 4

C

1, 2 and 3

D

3, 4 and 1

What happens to the strength of electromagnet if the soft iron core is put into it?

A

It will increase

B

It will decrease

C

It will remain constant

D

Initially, it will increase and then decrease.

Electromagnets are made of soft iron because soft iron has

A

High retentivity and low coercive force

B

Low retentivity and high coercive force

C

High retentivity and high coercive force

D

Low retentivity and low coercive force

Electromagnets are made of soft iron because soft iron have :

A

low retentivity and high susceptibility

B

low retentivity and low susceptibility

C

high retentivity and high susceptibility

D

high retentivity and low susceptibility

The electric current of an electromagnet is switched off then the magnetic property of the electromagnet will-

A

Remain for few moment

B

Vanish instantly

C

Will decrease with time for long

D

Will increase with time for long

A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from

A

The current source

B

The magnetic field

C

The lattice structure of the material of the rod

D

The induced electric field due to the changing magnetic field

Which of the following statements is incorrect? (1) The Oceanic crust is thinner as compared to the continental crust. (2) Topmost layer of the Mantle is known as the Asthenosphere. (3) The density of the outer core is higher than that of the inner core. (4) The core is made up of heavy materials like Iron and Nickel.

A

1, 2 and 3

B

1, 2 and 4

C

2, 3 and 4

D

All of the above

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.

A

Only A

B

Only B

C

Only C

D

Only A and B

The core of an electromagnet is made of soft iron because soft iron has

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