SI unit of magnetic dipole moment is
SI unit of magnetic dipole moment is
Options
(a) A m⁻¹ (b) A m² (c) T m A⁻¹ (d) m A⁻²
Correct Answer:
A m²
Explanation:
The SI unit of magnetic dipole moment is […]
Physics
The velocity v of waves produced in water depends on their wavelength λ, the density
The velocity v of waves produced in water depends on their wavelength λ, the density of water d and acceleration due to gravity g. These quantities are related as (where K is a dimensionless constant) […]
In the elastic collision of objects
In the elastic collision of objects
Options
(a) Only momentum remains constant (b) Only K.E remains constant (c) Both remain constant (d) None of these
Correct Answer:
Both remain constant
Explanation:
No explanation […]
If a body is rolling on the surface, its total energy will be
If a body is rolling on the surface, its total energy will be
Options
(a)(1/2) mv² – (Gm₁m₂/R) (b) (1/2) mv² + (1/2) Iω² (c) (1/2) mv² – (1/2) mR²ω² (d) None
Correct […]
A vibrating string of certain length l under a tension T resonates with a mode
A vibrating string of certain length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at […]
A string is stretched between fixed points seperated by 75 cm. It is observed
A string is stretched between fixed points seperated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the […]
In Young’s double slit interference experiment, using two coherent waves
In Young’s double slit interference experiment, using two coherent waves of different amplitudes, the intensities ratio between bright and dark fringes is 3. Then, the valule of the wave amplitudes ratio heat arrive there is […]
The polarising angle of glass is 57⁰. A ray of light which is incident at this angle
The polarising angle of glass is 57⁰. A ray of light which is incident at this angle will have an angle of refraction as
Options
(a) 43⁰ (b) 25⁰ (c) 38⁰ (d) 33⁰
Correct […]
40 g of Argon is heated from 40⁰C to 100⁰C (R=2 cal/mole). Heat absorbed at constant
40 g of Argon is heated from 40⁰C to 100⁰C (R=2 cal/mole). Heat absorbed at constant volume is
Options
(a) 100 cal (b) 80 cal (c) 180 cal (d) 120 cal
Correct Answer: […]
The coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is
The coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is
Options
(a) 10 (b) 1 (c) 9 (d) zero
Correct Answer:
9
Explanation:
Coefficient of performance = K .·. […]