What is meant by work? The product of force applied on an object and displacement of the object along that force is known as work. Thus, Work = Force ⨯ Displacement along the force If a force F is applied on an object and that object is displaced s distance along that force, then work … Read more
What is meant by an engine’s efficiency being 30%? By an engine’s efficiency is 30% it is meant that if 100 J energy is given as input to the engine, it gives 30 J usable output energy.
Why does a mountaineer feel the blood in the nose at too much height? At too much height, blood pressure is greater than atmospheric pressure, that’s why a mountaineer feels blood in his nose. Air density and pressure are reduced as one goes up from the earth’s surface. At the higher point, the atmospheric pressure … Read more
What do you mean by 1 pascal? Pascal is the unit of pressure. If 1 N force is applied per unit area, the pressure created is known as 1 pascal. or, A pascal is a pressure of one newton per square meter. or, One Newton force was applied on an area of 1m2. It is … Read more
Why does water boil faster in the electric kettle? Nichrome wire is used in electric kettles because nichrome wire has specific resistance higher than most the other materials. As a result, when electricity flows through this wire, a great amount of heat is generated. And so water boils faster in the kettle.
What do you understand by the resistance of a conductor is 12 Ohm? We know, resistance is the ratio of the voltage difference to the current flow. 12 Ohm resistance means that the ratio of the voltage difference to the current flow is 12.
The conductivity of any conductor depends on which factors? The conductivity of any conductor depends on the type of element and temperature. Commonly, metals are good conductors. On the other hand, non-metals are not good conductors. On the other hand, non-metals are not good conductors. Again, with the increase in temperature the conductivity of conductors … Read more
What is a variable? The type of resistance, whose value can be changed within a certain limit, is called variable resistance. Its resistance can be changed as per requirement.