Archives

Explain the balmer and rydberg equations

It was in 1885 when Balmer first of all came up with a simple formula for predicting the wavelength of any of the lines in what we now know as... View Article

Explain hydrogen spectrum wavelength in details

When a hydrogen atom absorbs a photon, it causes the electron to experience a transition to a higher energy level, for example, n = 1, n = 2.... View Article

Explain what is hydrogen spectrum?

When Hydrogen gas is passed through a discharge tube (A hydrogen discharge tube is a slim tube containing hydrogen gas at low pressure with an... View Article

Explain hund’s rule and spectroscopic term of the ground state of an atom

Hund's rule predicts the stable state of an atom to have large number of unpaired electrons (High spin configuration). The ground state is given... View Article

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

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

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Archives

Explain the balmer and rydberg equations

Explain hydrogen spectrum wavelength in details

Explain what is hydrogen spectrum?

Explain hund’s rule and spectroscopic term of the ground state of an atom

Explain hund’s rule and electronic configuration

What is hund’s rule of multiplicity?

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

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?

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

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.

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

What are the applications of heating effect of electric current?

Explain the heating effect of electric current

Define potential difference between two points

Explain faraday’s second law of electrolysis in details

Explain faraday’s first law of electrolysis in details

Explain faradays laws of electrolysis in details

State faraday law of electro magnetic induction?

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

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?