Answer: (D) AC generator has slip rings while the DC generator has a commutator. A generator is a mechanical equipment which converts a... View Article
Given that Electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. Find out The number of lamps that can be... View Article
Answer: (a) The given statement is possible. The word acceleration implies a change in the object's velocity. One example of this is vertical... View Article
Work is done whenever the given conditions are satisfied: A force acts on the body. There is a displacement of the body by the application... View Article
Answer: According to Ohm’s law V = IR where V= potential difference I= Current R = Resistance We can also modify the above equation as... View Article
Total Distance covered from AB = 300m Total time taken = 2—60+30s =150s Therefore, Average speed from AB= Total Distance/ Total Time =300/150m... View Article
Column A Column B (a)Straight angle 1 Less than one-fourth of a revolution (b)Right angle 2 More than half a revolution (c)Acute angle 3... View Article
Answer: The law of conservation of energy states that energy can be neither created nor destroyed. It can only be converted from one form to... View Article
Answer: (i) J.J. Thomson proposed that the nucleus of an atom contains only nucleons. (F) (ii) A neutron is formed by an electron and a proton... View Article
Adaptation is defined as the process where a species or an organism gradually becomes better acclimated to its environment. Adaptation is... View Article
Solution: (a)Â A place where animals are protected in their natural habitat is called a sanctuary (b) Species found only in a particular area are... View Article
Answer: Physical change - A substance is said to undergo a physical change when only the physical properties such as the shape, size, colour,... View Article
Answer: (C) half revolution The direction of the induced current varies once every half revolution when a rectangular coil is rotated in a... View Article
Given that Petrol filled on Monday = 40 liters Petrol filled on next day = 50 liters Cost of 1 liter petrol = Rs. 44 Find out We have to... View Article
Answer: (A) both concave The distance from the lens to the focal point is called the focal length. For converging lenses, the focal length is... View Article
a) Since there are three people to eat, Arya should divide his sandwiches into 3 equal parts and give 1 part of each sandwich so that each person... View Article
Answer: Work is said to be done when a force applied to an object moves that object. Work done is generally referred to in relation to the force... View Article