1.Which of the following is a scalar quantity?
Electric Field Average Velocity Power Magnetic Momentum
2.If the velocity of a body is doubled-
Its Kinetic Energy is doubled Its potential Energy is doubled Its Momentum is doubled Its Acceleration is doubled
3.Clothes keep us warm in winter because they-
supply heat do not rediate heat prevent air from contacting the body prevent the heat of the body from escaping
4.Permanent magnet can be made from
Cobalt Aluminum Zinc Lead
5.Who among the following is known as 'Father of Biology'?
Aristotle Darwin Lamark Hippocrates