Question

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Answer 1

Answer:

Ans 19) Blunt blades have larger area compared to the sharp-edged blades. Thus, the applied force produces a lower pressure in case of blunt blades, which makes it difficult to cut the cloth.

Ans 20) Similarities

Electric fields are produced by two kinds of charges, positive and negative. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). Like poles repel; unlike poles attract.

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Answer 2

Answer: Q19-Blunt blades have larger area compared to the sharp edge blades.  the applied force produces a lower pressure in case of blunt blades which makes it difficult to cut cloth. 20Q-Ans-Magnetic Fields are with two magnetic poles north and south.Same is in electrolastic force.although they are also produced by charges

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