A force of 1 N doubles the length of a cord having cross-sectional area 1 mm2. The Young’s modulus of the material of cord is
(A) 1 N m-2
(B) 0.5 × 106 N m-2
(C) 106 N m-2
(D) 2 × 106 N m-2
1 Answers
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What is the drift velocity of electrons in a copper conductor having a cross-sectional area of `5xx10^(-6) m^(2)` if the current is 10 A. Assume there
Correct Answer - `1.56 ms^(-1)`
2 Answers 1 views
A current of 2 A is flowing through a wire of length 4 m and cross-sectional area `1 mm^(2)`. If each cubic metre of the wire contains `10^(29)` free
Correct Answer - `3.2xx10^(4)s`
2 Answers 1 views
Distinguish between Young’s modulus, bulk modulus and modulus of rigidity.
No Young’s modulus Bulk modulus Modulus of rigidity i It is the ratio of longitudinal stress to longitudinal strain. It is the ratio of volume stress to volume strain. It is the ratio of shearing stress to...
2 Answers 2 views
A tube of uniform cross sectional sectional area `1 cm^(2)` is closed at one end with semi permeable membrane. A solution having 6g glucose per 100 ml
Correct Answer - `0.2.5`
2 Answers 1 views
A force of 100 N produces a change of 0.1% in a length of wire of area of cross section 1 mm^2. Young’s modulus of the wire is ____
Correct option is: (C) 1011 N/m2
2 Answers 1 views
The Young’s modulus of a material is 10^11 Nm^-2 and its Poisson’s ratio is 0.2. The modulus of rigidity of the material is
Correct option is: (A) 0.42 × 1011 N/m2
2 Answers 1 views
The increase in energy of a metal bar of length ‘L’ and cross-sectional area ‘A’ when compressed with a load ‘M’ along its length is
(B) \(\frac{F^2 L}{2AY}\) U = \(\frac{1}{2}\) × F × l = \(\frac{1}{2}\) × F × \(\frac{FL}{AY}=\frac{F^2 L}{2AY}\)
2 Answers 1 views
Two rods of same material are equal in length, but one has cross-sectional area double the other.
Correct option is: (C) both rods will expand equally.
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The resistance of a conductor …………………. when the length of a conductor increased for providing constant temperature and cross-sectional area.
B) increases
2 Answers 1 views
Pressure = ………… A) Force B) Force x area C) Area / force D) Force / area
D) Force / area
2 Answers 1 views