PDF chapter test TRY NOW
Check the assertion and reason then, choose the best option:
1) Assertion: When a glass rod is rubbed with a silk cloth, the glass rod acquires a positive charge, and silk becomes negative.
Reason: The glass rod loses electrons; it has a deficiency of electrons and hence acquires positive charge. But, the silk cloth has an excess of electrons. So, it becomes negatively charged.
2) Assertion: One should not use an umbrella while crossing an open field during a thunderstorm.
Reason: As the rod of the umbrella and its supporting wires are made up of plastics, it may affect the person who holds the umbrella.
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