Large transformers, when used for some time, become hot and are cooled by circulating
Large transformers, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is…
6 years ago
MP2001
Penetrating power of X-rays does not depend on
Penetrating power of X-rays does not depend on Options (a) potential difference (between anode and cathode) (b) Current in the…
6 years ago
Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV.
Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV. The minimum kinetic…
6 years ago
The sodium nucleus ₁₁Na²³ contains
The sodium nucleus ₁₁Na²³ contains Options (a) 11 electrons (b) 12 protons (c) 23 protons (d) 12 neutrons Correct Answer:…
6 years ago
For principal quantum number n=3, the possible values of orbital quantum number
For principal quantum number n=3, the possible values of orbital quantum number l are Options (a) 1,2,3 (b) 0,1,2,3 (c)…
6 years ago
A solenoid of length l metre has self inductance L henry. If number of turns
A solenoid of length l metre has self inductance L henry. If number of turns are doubled, its self inductance…
6 years ago
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…
6 years ago
If critical angle for a material to air passage is 30°, the refractive index
If critical angle for a material to air passage is 30°, the refractive index of the material will be Options…
6 years ago
1 a.m.u. is equivalent to
1 a.m.u. is equivalent to Options (a) 1.6x10⁻¹² J (b) 1.6x10⁻¹⁹ J (c) 1.5x10⁻¹⁰ J (d) 1.5x10⁻¹⁹ J Correct Answer:…
6 years ago
From a disc of radius R, a concentric circular portion of radius r is cut-out so
From a disc of radius R, a concentric circular portion of radius r is cut-out so as to leave an…
6 years ago