Q. No.(Take g=10 ms−2)
1. 2×103 kg
2. 3×104 kg
3. 5×104 kg
4. 7×104 kg
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For the figures given below, the correct observation is:
| 1. | pressure at the bottom of the tank (a) is greater than at the bottom of the tank (b). |
| 2. | pressure at the bottom of the tank (a) is lesser than at the bottom of (b). |
| 3. | pressure depends upon the shape of the container. |
| 4. | pressure at the bottom of (a) and (b) are the same. |
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A liquid is poured into three vessels of the same base area and equal heights as shown in the figure, then:
| 1. | The maximum force on the base will be for the vessel C. |
| 2. | The maximum force on the base will be for the vessel B. |
| 3. | The maximum force on the base will be for the vessel A. |
| 4. | Force on the base will be equal for all the vessels. |
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A diver is 10 m below the surface of the water. The approximate pressure experienced by the diver is:
1. 105 Pa
2. 2×105 Pa
3. 3×105 Pa
4. 4×105 Pa
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If pressure at half the depth of a lake is equal to 2/3rd the pressure at the bottom of the lake, then the depth of the lake is:
| 1. | 10 m | 2. | 20 m |
| 3. | 60 m | 4. | 30 m |
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The area of cross-section of the wider tube shown in the figure is 800 cm2. If a mass of 12 kg is placed on the massless piston, then the difference in heights h of the levels of water in the two tubes will be:
| 1. | 10 cm | 2. | 6 cm |
| 3. | 15 cm | 4. | 2 cm |
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The value of g at a place decreases by 2%. Then, the barometric height of mercury:
| 1. | increases by 2%. | 2. | decreases by 2%. |
| 3. | remains unchanged. | 4. | sometimes increases and sometimes decreases. |
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The height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill. The ratio of the density of mercury to that of air is 104. The height of the hill is:
| 1. | 250 m | 2. | 2.5 km |
| 3. | 1.25 km | 4. | 750 m |
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A siphon in use is demonstrated in the following figure. The density of the liquid flowing in the siphon is 1.5 gm/cc. The pressure difference between the point P and S will be:
| 1. | 105 N / m | 2. | 2 × 105 N / m |
| 3. | Zero | 4. | Infinity |
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A vertical U-tube of uniform inner cross-section contains mercury in both its arms. A glycerin (density=1.3 g/cm3) column of length 10 cm is introduced into one of its arms. Oil of density 0.8 g/cm3 is poured into the other arm until the upper surfaces of the oil and glycerin are at the same horizontal level. The length of the oil column is:
(density of mercury =13.6 g/cm3)
1. 10.4 cm
2. 8.2 cm
3. 7.2 cm
4. 9.6 cm
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