Physics

Question 1

Circumference of Bohr’s orbit

Answer 1

c = n λ
where λ is the de Broglie wavelength

Question 2

Frequency of standing wave

Answer 2

F = odd x v/4l

Question 3

Angular momentum of electron in Bohr’s orbit is…

Answer 3

L = n h/2π
where n is the shell number/principal quantum number

Question 4

Angular momentum =
(General)

Answer 4

L = mvr

Question 5

Radius of Atomic Orbit

Answer 5

r = 0.529 n^2/z
in armstrong Å

Question 6

Velocity of electron in an atomic orbital

Answer 6

v = 2.2x10^6 z/n

Question 7

Energy of atomic orbital

Answer 7

E = -13.6 z^2/n^2 eV

Question 8

Kinetic energy and energy of orbital relation

Answer 8

K = -E

Question 9

Electrical Potential energy and energy of orbital relation

Answer 9

U = 2E

Question 10

State the Bohr’s Orbit

Answer 10

ro = 0.529

Question 11

If a dielectric slab is inserted in between a capacitor, what is the new capacitance

Answer 11

C(new) = C.k
where K is the dielectric constant

Question 12

If a dielectric slab is inserted in between a capacitor what remains constant and what changes

Answer 12

charge stored remains constant
only capacitance changes

Question 13

Coefficient of restitution formula

Answer 13

e = velocity of separation/velocity of approach

Question 14

Refractive index formula

Answer 14

sin c = 1/μ

where μ = refractive index of dense/refractive index of rare

Question 15

Relation between velocity of longitudinal wave, young’s modulus and density

Answer 15

v = √Y/ρ

where Y is the young’s modulus

Question 16

Angular frequency in terms of spring constant and mass

Answer 16

ω =√k/m

Question 17

State the proportionality between the resistance of a wire and length of wire upon expansion or compression

Answer 17

R is proportional to (length)^2

ONLY true when wire is compressed or expanded