Question

B) Match the Columns. 'A' Group 1) Mercury 2) Electric potential 3) Blunt knife 4) Algae 'B' Group B a) Lower pressure b) Thermometer c) Chlorella d) Volt​

Answer 1

1. Fluid – (e).same pressure in all directions

Explanation: For every point at same level in a fluid, experience same pressure in every direction.

2. Blunt knife - (d). Lower pressure

Explanation: Blunt knife has broader area. Pressure is inversely proportional to area. Thus, Blunt knife can exert only lower pressure while slicing.

3. Sharp needle - (a). Higher pressure

Explanation: Sharp needle has a very narrow tip. This means that the force applied to needle acts on very small area only. Since area which force is acting is very small, pressure will be higher.

4. Relative density – (c). Specific gravity

Explanation: Relative density is same as that of specific gravity.

Relative density (specific gravity) of an object

.

5. Hecto Pascal – (b). Atmospheric Pressure

Explanation: Hecto Pascal is a unit normally used to measure the atmospheric pressure. It is a scalar quantity. SI unit of pressure is Pascal.

1 Hecto Pascal = 100 Pascal

Answer 2

Answer:

1-b 2-d 3 a 4 c

mercury- thermometer

electric potential - volt

blunt knife - lower pressure

algae - chlorella

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