Electric potential is given by 
T, hen electric force acting on 2C point charge placed on origin will be
|
(a) 2N |
(b) 6N |
(c) 8N |
(d) 20 N |
(d) 20 N
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According to Faraday's laws of electrolysis, the amount of decomposition is proportional to
|
(a) |
(b) Electrochemical equivalent of the substance |
|
(c) |
(d) |
The energy that should be added to an electron to reduce its de Broglie wavelength from one nm to 0.5 nm is
|
(a) Four times the initial energy |
(b) Equal to the initial energy |
|
(c) Twice the initial energy |
(d) Thrice the initial energy |
A moving coil galvanometer has N number of turns in a coil of effective area A, it carries a current I. The magnetic field B is radial. The torque acting on the coil is
|
(a) |
(b) |
(c) |
(d) NABI |
Two insulated charged spheres of radii 20 cm and 25 cm respectively and having an equal charge Q are connected by a copper wire, then they are separated
|
(a) Both the spheres will have the same charge Q |
|
(b) Charge on the 20 cm sphere will be greater than that on the 25 cm sphere |
|
(c) Charge on the 25 cm sphere will be greater than that on the 20 cm sphere |
|
(d) Charge on each of the sphere will be 2Q |
In a wave, the path difference corresponding to a phase difference of f is
|
(a) |
(b) |
(c) |
(d) |
