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In a large commercial complex, there are four ways to reach the main road. One of the paths has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has a gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is (a) loose soil. (b) polished marble. (c) bricks. (d) gravel.

Answer: (d) gravel She should use a gravel surface path because only in this path. She will have sufficient friction force to walk easily.... View Article

In Fig, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct? (a) The magnitude of force applied by A is greater than that of B. (b) The magnitude of force applied by A is smaller than that of B. (c) The net force on the block is towards A. (d) The magnitude of force applied by A is equal to that of B.

Answer: (a) Magnitude of force applied by A is greater than that of B. When force is applied to a stationary object, the object tends to move in... View Article

In the circuit given as Fig. , Boojho observed that copper is deposited on the electrode connected to the negative terminal of the battery. Paheli tried to repeat the same experiment. But she could find only one copper plate. Therefore she took a carbon rod as a negative electrode. Will copper be still deposited on the carbon rod? Explain your answer.

Answer: Copper will be deposited on the carbon rod from the copper sulphate solution. When an electric current is passed through a copper... View Article