Explain start-up current in the bulb, The cold filament resistance of a lig...

The cold filament resistance of a light bulb is 20.0). The bulb consumes 75 W when it is operating from a 120-V source. By what factor does the start-up current in the bulb

Why the centre of newtons rings pattern appears dark, Q. Why the centre of ...

Q. Why the centre of Newton's rings pattern appears dark? The thickness of the air film becomes zero at the point of contact of lens L with glass plate P. Therefore there is no

Black hole, What is black hole

What is black hole

Importance of engineering materials, Materials are an essential part of an ...

Materials are an essential part of an engineering study. An engineer requires materials to provide shape to his concept and design. Selection of the right material job in the first

What is described by millikan experiment?, The Millikan experiment showed t...

The Millikan experiment showed that electric charge was: a) Negative b) Quantized c) Positive d) Immeasurable Ans: The Millikan experiment showed that elec

Which one of the following pairs is not correctly matched, Which one of the...

Which one of the following pairs is not correctly matched: (1) Rutherford-Proton (2) J.J. Thomsom-Electron (3) J.H. Chadwick-Neutron (4) Bohr-Isotope Ans:(4)Bohr-Is

Heat therapy -the conductive method, The conductive method Heat can be...

The conductive method Heat can be transferred by conduction from warmer to cooler objects, the quantity of heat transfer depends on the temperature difference between the two

Forces and nature,

Parallel and unlike forces, GIve live examples for like and unlike paralle...

GIve live examples for like and unlike parallel forces

What do you mean by thermoelectric refrigerators, What is the specific resi...

What is the specific resistance of material of a conductor. What do you mean by thermoelectric refrigerators?