A gas undergoes a process in which its pressure P and volume V are related as VPn=constantVPn=constant. The bulk modulus for the gas in the process is:
[This question includes concepts from Kinetic Theory chapter]
1. PnPn
2. P1/nP1/n
3. nP
4. PnPn
The Young's modulus of a wire of length 'L' and radius 'r' is 'Y'. If length is reduced to L/2 and radius r/2, then Young's modulus will be
1. Y/2
2. Y
3. 2Y
4. 4Y
Three wires A,B,CA,B,C made of the same material and radius have different lengths. The graphs in the figure show the elongation-load variation. The longest wire is:
1. AA
2. BB
3. CC
4. All of the above
The breaking stress of a wire depends upon:
1. | material of the wire. |
2. | length of the wire. |
3. | radius of the wire. |
4. | shape of the cross-section. |
The bulk modulus of a spherical object is BB. If it is subjected to uniform pressure PP, the fractional decrease in radius will be:
1. PBPB
2. B3PB3P
3. 3PB3PB
4. P3BP3B
1. | 1:21:2 | 2. | 2:12:1 |
3. | 4:14:1 | 4. | 1:11:1 |
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 FF is needed to break a copper wire having radius R.R. The force needed to break a copper wire of radius 2R2R will be:
1. | F/2F/2 | 2. | 2F2F |
3. | 4F4F | 4. | F/4F/4 |