Magnetic Effects of Current and Magnetism (AIIMS Physics): Questions 27 - 30 of 49

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Question number: 27

» Magnetic Effects of Current and Magnetism » Electromagnets and Permanent Magnets

Appeared in Year: 1999

MCQ▾

Question

When a magnetic substance is heated, then it – [AIIMS]

Choices

Choice (4) Response
a.

Becomes a strong magnet

b.

Does not affect the magnetism

c.

Losses its magnetism

d. None of the above

Question number: 28

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

In high latitudes one sees colorful curtains of light hanging down from high altitudes.

Reason (Ꭱ)

The high energy charged particles from the sun are defected to Polar Regions by the magnetic field of the earth.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
b. Ꭺ is true but Ꭱ is false
c. Ꭺ is false but Ꭱ is true
d. Both Ꭺ and Ꭱ are false

Question number: 29

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

Appeared in Year: 2006

Assertion-Reason▾

Assertion (Ꭺ)

Diamagnetic materials can exhibit magnetism.

Reason (Ꭱ)

Diamagnetic materials have permanent magnetic dipole moment.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are false
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

Question number: 30

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

The true geographic north direction is found by using a compass needle.

Reason (Ꭱ)

The magnetic meridian of the earth is along the axis of rotation of the earth.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Ꭺ is false but Ꭱ is true
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are false

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