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Explain thermodynamics in brief

Thermodynamics is the study of the effects of work, heat, and energy on a system. Thermodynamics is only concerned with macroscopic... View Article

Explain classical vs statistical thermodynamics

Classical vs Statistical Classical thermodynamics concerns the relationships between bulk properties of matter. Nothing is examined at... View Article

Explain what are spectrum lines?

In the late 1800s, it was known that when a gas is excited using an electric discharge and the light emitted is viewed through a diffraction... View Article

Explain what is the hydrogen emission spectrum in details?

When atoms are heated or subjected to an electric discharge, they absorb energy, which is subsequently emitted as radiation. Actually electrons... View Article

In a hydrogen spectrum if electron moves from 7 to 1 orbit by transition in multi steps then find out the total number of lines in the spectrum.

Solution: Lyman = (n7 – 1) = 7 – 1 = 6 Balmer = (n7 – 2) = 7 – 2 = 5 Paschen = (n7 – 3) = 7 – 3 = 4... View Article

Find out the longest wavelength of absorption line for hydrogen gas containing atoms in ground state.

For longest wavelength ΔE should be smallest i.e. transition occurs from n = 1 to n = 2 i.e. 1/λ = 109673 cm-1 x 12 [1/12 –... View Article

Name some spectrum lines named after the scientists who discovered them

Like the Balmer series is the part of the hydrogen emission spectrum which is generated by the excitation of an electron from the second shell to... View Article

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

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

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