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Subject:Physics

The following four wires of length L and the radius r are made of same material. Which of these will have the largest extension when the same tension is applied.

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A.) L = 3000 cm, r = 1.5 mm
B.) L = 50 cm, r = 0.25 mm
C.) L = 200 cm, r = 1 mm
D.) L = 100 cm, r = 0.5 mm
Answer is option : A
Subject:Physics

Two wires A and B are of the same length. The diameters are in the ratio 1:2 and the Young’s modulus are in ratio 2:1. if they are pulled by the same force, then their elongations will be in ratio

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A.) 4:1
B.) 1:4
C.) 2:1
D.) 1:2
Answer is option : C
Subject:Physics

An iron bar of length ‘l’ m and cross section ‘A’ m2 is pulled by a force of ‘F’ Newton from both ends so as to produce and elongation in meters. Which of the following statement statements is correct

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A.) Elongation is inversely proportional to length l
B.) Elongation is directly proportional to cross section A
C.) Elongation is inversely proportional to A
D.)
Answer is option : C
Subject:Physics

A rubber cord of cross sectional area 1 mm2 and unstretched length 10 cm is stretched to 12 cm and then released to project a stone of mass 5 gram.

If Y for rubber = 5 × 108N/m2, then the tension in the rubber cord is

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A.) 25 N
B.) 100 N
C.) 50 N
D.) 150 N
Answer is option : B
Subject:Physics


A body of mass 500 g is fastened to one end of a steel wire of length 2 m and area of cross-section 2 mm2. if the breaking stress of he wire is 1.25 × 107 N/m2, then the maximum angular velocity with which the body can be rotated in a horizontal circle is

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A.) 2 rad/s
B.) 4 rad/s
C.) 3 rad/s
D.) 5 rad/s
Answer is option : D
Subject:Physics

The modulus of elasticity is dimensionally equivalent to

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A.) Surface tension
B.) Strain
C.) Stress
D.)
Answer is option : C
Subject:Physics

If by applying a force, the shape of a body is changed, then the corresponding stress is known as

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A.) Shearing stress
B.) Tensile stress
C.) Bulk stress
D.) Compressive stress
Answer is option : A
Subject:Physics

If the work done in stretching a wire by 1 mm is 2 J, the work necessary for stretching another wire of the same material but with double the radius of cross-section and half the length by 1 mm is in joules.

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A.) 4
B.) 16
C.) 8
D.) 1/4
Answer is option : B
Subject:Mathematics

If the permutations of A,B,C,D,E taken all together be written down in alphabetical order as in dictionary and numbered, then the rank of the permutation DEBAC is

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A.) 90
B.) 93
C.) 91
D.) 92
Answer is option : B
Subject:Mathematics

he letters of word RANDOM are written in all possible orders and these words are written out as in dictionary. Then the rank of the word RANDOM isYour question here

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A.) 614
B.) 616
C.) 615
D.) 613
Answer is option : A
Subject:

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A.)
B.)
C.)
D.)
Answer is option :
Subject:Mathematics

A fruit basket contains 4 oranges, 5 apples and 6 mangoes. The number of ways a person make selection of fruits from among the fruits in the basket is

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A.) 210
B.) 209
C.) 208
D.) None of These
Answer is option : B


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