1. | \(1:2\) | 2. | \(2:1\) |
3. | \(4:1\) | 4. | \(1:1\) |
Copper of fixed volume V is drawn into a wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is Δl. Which of the following graphs is a straight line?
(1) Δl versues 1/l
(2) Δl versus l2
(3) Δl versus 1/l2
(4) Δl versus l
The following four wires are made of the same material. Which of them will have the largest extension when the same tension is applied?
(1) Length=50 cm, diameter=0.5 mm
(2) Length=100 cm, diameter=1 mm
(3) Length=200 cm, diameter=2 mm
(4) Length=300 cm, diameter=3 mm
When a certain weight is suspended from a long uniform wire, its length increases by one cm. If the same weight is suspended from another wire of the same material and length but having a diameter half of the first one, then the increase in length will be -
1. 0.5 cm
2. 2 cm
3. 4 cm
4. 8 cm
The material which practically does not show elastic after effect is
1. Copper
2. Rubber
3. Steel
4. Quartz
A force \(F\) is needed to break a copper wire having radius \(R.\) The force needed to break a copper wire of radius \(2R\) will be:
1. | \(F/2\) | 2. | \(2F\) |
3. | \(4F\) | 4. | \(F/4\) |
The relationship between Young's modulus Y, Bulk modulus K and modulus of rigidity n is
1.
2.
3.
4.
The Young's modulus of a rubber string 8 cm long and density is , is suspended on the ceiling in a room. The increase in length due to its own weight will be
1.
2.
3.
4. 9.6 m
A and B are two wires of same material. The radius of A is twice that of B. They are stretched by the same load. Then the stress on B is
1. Equal to that on A
2. Four times that on A
3. Two times that on A
4. Half that on A
If the length of a wire is reduced to half, then it can hold the ......... load
1. Half
2. Same
3. Double
4. One fourth