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Physics-

General

Easy

Question

The time period of a bar magnet suspended horizontally in the earth's magnetic field and allowed to oscillate

Is directly proportional to the square root of its mass
Is directly proportional to its pole strength
Is inversely proportional to its magnetic moment
Decreases if the length increases but pole strength remains same

The correct answer is: Is directly proportional to the square root of its mass

$T equals 2 pi square root of fraction numerator I over denominator M B subscript H end subscript end fraction end root text and end text I equals fraction numerator w left parenthesis l to the power of 2 end exponent plus b to the power of 2 end exponent right parenthesis over denominator 12 end fraction semicolon therefore T proportional to square root of w$
(w = Mass of the magnet)

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Time period for a magnet is T. If it is divided in four equal parts along its axis and perpendicular to its axis as shown then time period for each part will be

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At which place, earth's magnetism become horizontal

At which place, earth's magnetism become horizontal

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At a certain place the horizontal component of the earth’s magnetic field is B₀ and the angle of dip is 45^o. The total intensity of the field at that place will be

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If the normal at the points P_i (x_i, y_i), i = 1 to 4 on the hyperbola xy = c² are concurrent at the point Q(h, k), then $fraction numerator open parentheses x subscript 1 end subscript plus x subscript 2 end subscript plus x subscript 3 end subscript plus x subscript 4 end subscript close parentheses open parentheses y subscript 1 end subscript plus y subscript 2 end subscript plus y subscript 3 end subscript plus y subscript 4 end subscript close parentheses over denominator x subscript 1 end subscript x subscript 2 end subscript x subscript 3 end subscript x subscript 4 end subscript end fraction$ is equal to

parallel

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Chemistry-General

structure is

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Chemistry-General

parallel

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Chemistry-General

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parallel

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