For some particles specific charge can’t be determined, so it can’t be said electron or positron has more specific charge. The potential drop in a loop in any electric circuit is zero and its based on conservation of energy.

chose the correct one

resultant of capacitance in series in more than individual resistances current division works on the basis of direct proportionality of resistances voltage division works on the basis of direct proportionality of resistances resistors in series will add up

ohms’ law corresponds to the following

voltage and current are proportional even if resistance varies. Linear relation between voltage and current can be accommodated to an arbitrary range of resistances.

system of unit

a. 3

system of unit

a. 3

100 electrons

unit cross section area

current of 100 x 1.6 x 10 19 coul/sec

drift velocity

5 units

µf

dielectric strength

temperature coefficient of resistance α

de broglie wavelength

electric current

electric current density.

bohr radius of hydrogen atom a

speed of an electron in a hydrogen atom

5 th orbit v_n v₅.

According to the bohr’s model of an atom ? 6 give example of 2 conservative forces. 8 write out the expression of n th level atomic spectra <energy level > of a hydrogen atom. What energy will be released if the electron jumps from level 4 to level 1. ? 9 write out the expression of n th level atomic spectra <energy level > of a hydrogen atom. What energy will be released if the electron jumps from level 5 to level 2? 10 what’s the power of a lens whose object distance is 15 cm and whose image distance is 55 cm ? 11 what’s the focal length of a convex lens if object distance is 20 cm and image distance is 30 cm. 12 what’s the resistance of a wire that obeys ohm’s law if it carries a current of 2.5 amp when a potential difference of 230 volts is applied across its ends? define electric current and electric current density. Derive the electric potential v for the dipole vector p, v in a direction of alignment with the dipole vector.

Also called end on configuration. show that the electric field due to a dipole vector is zero along a line perpendicular to it. Derive the magnetic field due to a torroid by using ampere’s circuital law. Apply the gauss law to the case of an infinitely straight distribution of charge with linear density of charge λ. What is signified by the fact that lines of forces are densely packed? why lines of forces must not intersect? derive the expressions for combination of 3 capacitors in series and parallel.

What’s the capacitance of a combination of two capacitors each with capacitance 12 µf connected in series. Derive the expression for the capacitance of a configuration where two plates are kept distance d apart when a material of thickness t with dielectric constant k is inserted in between. Derive the magnetic field b of a solenoid by using ampere’s circuital law. From the lorentz force expression derive the force acting on a current element of length l by a magnetic field b. What is x ray emission? what are k_a and k_b lines? describe the bohr model for atom and point out its drawbacks. Calculate the emission energy of a hydrogen atom if an electron jumps from n 8 to n 1 level.

Explain the origin of k _a and k _b lines through electronic transitions. Describe the millikan’s experiment for electron charge e. derive in necessary steps how e would be determined by this set up from various known parameters. Maximum kinetic energy of electrons and stopping potential? describe the ideas of photoelectric effect. I finished my chemistry exam today and was surprised to see that 70 to 80% of the questions were from your expected question bank only.

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