EASY
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According to Right-hand thumb rule, the thumb indicates the direction of

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Important Questions on Magnetic Effects of Electric Current

MEDIUM

A bar magnet is used to pick up an iron nail

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At which part P, Q, and R is the easiest for the magnet to pick up the iron nail? 

HARD
A metallic rod falls under gravity with its ends pointing east and west, then
HARD

A constant current I flows in a horizontal wire in the plane of the paper from West to East as shown in the figure. The direction of magnetic field at a point will be South to North

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EASY

Which of the following is NOT correct for magnetic filed lines?

EASY

Observe the diagram.
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The magnetic poles represented by P and Q respectively are

MEDIUM

The diagram shows a current carrying wire passing through the centre of a square card board. The magnetic field at points AB  and C is:

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EASY
The area surrounding a magnet where its force can be detected, is called 
EASY
The magnetic field intensity (B) at a distance 'r' from a long straight conductor carrying a steady current varies with 'r' as shown in figure: 
EASY

Observe the following diagram and choose the correct alternative.

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EASY

The figure shows the magnetic field lines of a magnetic field. There are three points A, B and C in this field. Choose the correct option regarding field strength.

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EASY
A normal bar magnet is 6 cm long. It’s North Pole will be away from its mid-point at a distance of:
MEDIUM
What do you call the effect of splitting of a spectral line into several components in the presence of a static magnetic field?
EASY

In figure, magnetic field between two magnets is shown. Which magnetic poles are present at point A and point B respectively of magnets?

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