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It is easier to roll a honey cylinder over a surface because rolling friction is much less than kinetic friction.

Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting.

The light particle conceived by Einstein is called a photon. The main point of his light quantum theory is the idea that light’s energy is related to its oscillation frequency (known as frequency in the case of radio waves).

Natural rubber is from the monomer isoprene (2-methyl-1,3-butadiene). Since isoprene has two double bonds, it still retains one of them after the polymerization reaction. Natural rubber has the cis configuration for the methyl groups.

To reverse rotation on a single phase capacitor start motor, you will need to reverse the polarity of the starter winding. This will cause the magnetic field to change directions, and the motor will follow. In order to achieve this, you can swap the connections on either end of the winding. Always reverse the wires that lead to the starter winding.

An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. For reasons of cost and simplicity, most alternators use a rotating magnetic field with a stationary armature. Occasionally, a linear alternator or a rotating armature with a stationary magnetic field is used. In principle, any AC electrical generator can be called an alternator, but usually the term refers to small rotating machines driven by automotive and other internal combustion engines. An alternator that uses a permanent magnet for its magnetic field is called a magneto. Alternators in power stations driven by steam turbines are called turbo-alternators. Large 50 or 60 Hz three-phase alternators in power plants generate most of the world’s electric power, which is distributed by electric power grids.

When two transformers are installed in an open-delta configuration, the total bank capacity can be found by the use of the following procedure.

  1. Add the two individual transformer kVA ratings. (For the problem given, the single-phase transformers are rated at 50 kVA.)

10= 20kVA

  1. Then multiply the total kVA value by 86.5 percent. This will give the total kVA capacity of the open-delta transformer bank.

20 x 86.5% = 17.4 kVA

Resultant of two forces = 50 – 20 = 30 Newtons towards west.

Viscosity of a liquid decreases when the temperature is raised.

The cohesive forces between molecules of liquids decrease as temperature increases. At high temperature the molecules of liquids have high energy and overcome strong cohesive forces and move freely. Hence , viscosity of liquids decreases with increase in temperature.

Faraday?s law states that a current will be induced in a conductor which is exposed to a changing magnetic field. Lenz?s law of electromagnetic induction states that the direction of this induced current will be such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it. The direction of this current flow can be determined using Fleming?s right-hand rule.

Faraday?s law of induction explains the working principle of transformers, motors, generators, and inductors. The law is named after Michael Faraday, who performed an experiment with a magnet and a coil. During Faraday?s experiment, he discovered how EMF is induced in a coil when the flux passing through the coil changes.

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