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…
Large transformers, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is…
Penetrating power of X-rays does not depend on Options (a) potential difference (between anode and cathode) (b) Current in the…
Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV. The minimum kinetic…
The sodium nucleus ₁₁Na²³ contains Options (a) 11 electrons (b) 12 protons (c) 23 protons (d) 12 neutrons Correct Answer:…
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)…
A solenoid of length l metre has self inductance L henry. If number of turns are doubled, its self inductance…
The velocity v of waves produced in water depends on their wavelength λ, the density of water d and acceleration…
If critical angle for a material to air passage is 30°, the refractive index of the material will be Options…
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:…
From a disc of radius R, a concentric circular portion of radius r is cut-out so as to leave an…