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Explain hund’s rule and electronic configuration

While all the three Hund's rule is need for the understanding of the fine spectra of atoms, the first rule is sufficient for the electronic... View Article

What is hund’s rule of multiplicity?

Introduction Atoms, contains protons and neutrons in the nucleus at the center and electrons revolving around nucleus. The attractive force by... View Article

Two bulbs are marked (a) 100 w and 220 v (b) 40 w and 220 v. which has higher resistance?

Solutions: Here E1 = 220 V P1 = 100 W E2 = 220 V P2 = 40 W (a) P1 = E1I1 = 484 ohms (b) P2 = E2I2 Hence the second both has... View Article

1000 w heater is used 6 hours daily and the cost of 1 unit of electricity is 40 p. how much will it cost in the month of november?

Solution: Here P = 1000 t = 6 × 30 = 180 hours Energy consumed = 180 kWh Cost... View Article

What voltage drop will be there across a 1 kw electric heater element whose resistance when hot is 40 ohms?

Solutions: Here P = 1 k W = 1000 W R = 40 ohms P = VI Or Or V = 200 volts Hence voltage drop is 200 V... View Article

Two electric lamps are rated for 220 volts 60 watts, and 220 volts 40 watts. find the heat generated in each lamp per second when they are connected in series across 220 volts.

Solution: P1 = 60 watts E1 = 220 volts Power of the second lamp watts volts When the two bulbs are joined in series the total... View Article

An electric kettle takes 4 amperes when put on a circuit of 250 volts. calculate the time required to prepare two cups calculate the cost at the rate of 20 p per unit

Solution: Mass of water = 450 g Rise in temp = 100 – 20 = 800C Heat produced = 450 × 1 × 80 = 36000 cal E = 250 volts = 4... View Article

What are the applications of heating effect of electric current?

Applications of Heating effect of Electric current: (i) Electrical fuse (ii) Electric Heater (or) stove, Electric Radiator and electric iron... View Article

Explain the heating effect of electric current

HEATING EFFECT OF ELECTRIC CURRENT: The phenomenon when a steady current flows through conductor the energy liberated during the current flow... View Article

Define potential difference between two points

Answer: Potential difference between any two points is defined as the amount of work done in moving a unit charge from one point to another... View Article

Explain faraday’s second law of electrolysis in details

Michael Faraday published faraday’s Laws of Electrolysis in 1834. ''The masses of different substances, liberated or dissolved by the same... View Article

Explain faraday’s first law of electrolysis in details

Faradays first electrolysis Law states that the quantity of reaction taking place in terms of mass of ions formed or discharged from an... View Article

Explain faradays laws of electrolysis in details

Electrolysis involves the reactions of giving and taking up of electrons. Naturally the amount or quantity of reactions shall depend upon the... View Article

State faraday law of electro magnetic induction?

Answer: There are two laws in Faraday's Laws of Electromagnetic Induction. The first law defines emf induction in a conductor, while the second... View Article

On what factor, does the magnitude of the emf induced in a circuit?

From faraday’s law rate of change of flux is directly proportional to the magnitude of emf.... View Article

Two spherical bobs one metallic and other one is glass of same size are allowed to free fall from same height above the ground which one would reach earlier and why?

In free fall mass cannot be a factor there is a possibility of electromagnetic induction in metallic bon due to earth’s magnetic field but for... View Article

A long straight current carrying wire passes normally through the centre of circular loop if the current through the wire increases will there be an induced emf in the loop? justify?

As we know magnetic field lines closed loops magnetic field lines produced by the straight current carrying wire will make Ɵ = 90° with the... View Article

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