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A simple wheel and axle
Remove the cover from a pencil sharpener and bind a string tightly around the end of the shaft. Bind a weight of various kilograms to the end of the string and turn the handle. Note that the force required to turn the handle is much less than the force of gravity on the weight. Point out that the pencil sharpener is used as a wheel and axle in this demonstration.
Working Principle of D.C Motor A) An electric motor is a machine which changes electrical energy into mechanical energy. B) When a current carrying conductor is placed in a
How theta between plane of the coil and magnetic field remains constant
(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.
A force of 25 N is applied vertically at the end of a wrench handle that is 45 cm long to tighten a bolt in the clockwise direction. What torque is required by the bolt to keep the
to calculate average speed, divide distance by time?
Number of neutron in C 12 is (1)6 (2)7 (3)8 (4)9 Ans: (1)6
A 12V battery is connected in a circuit having three series-connected resistors having resistances of 4 Ω,9 Ω and 11 Ω. Verify the current flowing through and the p.d. acr
Gravitational field can also be shown by lines of force. This is same in several ways as that of electric lines of forces. With one dissimilarity, electric charges are negative and
describe concave grating and rowland mountng
A thin uniform rectangular sign hangs vertically above the door of a shop. The sign is hinged to a stationary horizontal rod along its top edge. The mass of the sign is 2.40 kg and
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