The number of photons of wavelength of 540 nm emitted per second by an electric bulb
The number of photons of wavelength of 540 nm emitted per second by an electric bulb of power 100 W…
7 years ago
KL2002
Two identical cells of the same e.m.f. and same internal resistance
Two identical cells of the same e.m.f. and same internal resistance give the same current through an external resistance of…
7 years ago
The unit of specific conductivity is
The unit of specific conductivity is Options (a) Ohm⁻¹ cm⁻¹ (b) Ohm cm⁻² (c) Ohm-cm (d) Ohm⁻¹ cm⁻² Correct Answer:…
7 years ago
Dimensional formula for electrical resistance R is given by
Dimensional formula for electrical resistance R is given by Options (a) [M¹L²T⁻³I⁻²] (b) [ML²T⁻³I⁻²] (c) [ML²T³I⁻²] (d) [ML²T³I²] Correct Answer:…
7 years ago
Alternating current is transmitted to distant places at
Alternating current is transmitted to distant places at Options (a) Low voltage and high current (b) Low voltage and low…
7 years ago
A proton of mass 1.6×10⁻²⁷ kg goes round in a circular orbit of radius 0.10 m under
A proton of mass 1.6x10⁻²⁷ kg goes round in a circular orbit of radius 0.10 m under a centripetal force…
7 years ago
Cathode rays are produced when the pressure is of the order of
Cathode rays are produced when the pressure is of the order of Options (a) 2 cm of Hg (b) 0.1…
7 years ago
The escape velocity of a body on an imaginary planet which is thrice the radius
The escape velocity of a body on an imaginary planet which is thrice the radius of the earth are double…
7 years ago
The coefficient of friction between the tyres and the road is 0.25. The maximum speed
The coefficient of friction between the tyres and the road is 0.25. The maximum speed with which a car can…
7 years ago
A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
A ballet dancer, dancing on smooth floor, is spinning about a vertical axis with her arms folded with an angular…
7 years ago