The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰.
The angle of incidence for a ray of light at a refracting surface of a prism is 45⁰. The angle…
7 years ago
NEET2016
A astronomical telescope has objective and eye-piece of focal lengths
A astronomical telescope has objective and eye-piece of focal lengths 40 cm, 4 cm, respectively. To view an object 200…
7 years ago
In a diffraction pattern due to a singleslit of width a, the first minimum is observed
In a diffraction pattern due to a singleslit of width a, the first minimum is observed at an angle 30⁰…
7 years ago
The intensity at the maximum in a Young’s double slit experiment is I₀.
The intensity at the maximum in a Young's double slit experiment is I₀. Distance between two slits is d=5λ, where…
7 years ago
An electric dipole is placed at an angle 30°with an electric field intensity 2×10⁵N/C.
An electric dipole is placed at an angle 30°with an electric field intensity 2x10⁵N/C. It experiences a torque equal to…
7 years ago
When a metallic surface is illuminated with radiation of wavelength λ,
When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the same surface…
7 years ago
The charge flowing through a resistance R varies with time t as Q=at-bt²,
The charge flowing through a resistance R varies with time t as Q=at-bt², where a and b are positive constants.…
7 years ago
A potentiometer wire is 100cm long and a constant potential difference is maintained
A potentiometer wire is 100cm long and a constant potential difference is maintained across it. Two cells are connected in…
7 years ago
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon…
7 years ago
Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube.
Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength (λ₀)…
7 years ago