The maximum current that flows through a fuse wire before it blows out varies with its radius as
|
(a) |
(b) r |
(c) |
(d) |
The maximum current that flows through a fuse wire before it blows out varies with its radius as
|
(a) |
(b) r |
(c) |
(d) |
(a)
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The relation between Ip and Vp for a triode is
, Keeping the grid potential constant at 1V, the value of rp will be
|
(a) 8 kW |
(b) 4 kW |
(c) 2 kW |
(d) 8 kW |
The particles which can be added to the nucleus of an atom without changing its chemical properties are called
|
(a) Electrons |
(b) Protons |
(c) Neutrons |
(d) None of the above |
Photo-electric effect can be explained by
|
(a) Corpusular theory of light |
(b) Wave nature of light |
|
(c) Bohr’s theory |
(d) Quantum theory of light |
A charge of magnitude 3e and mass 2m is moving in an electric field
. The acceleration imparted to the charge is
|
(a) 2Ee/3m |
(b) 3Ee/2m |
(c) 2m/3Ee |
(d) 3m/2Ee |
Statement-II: For heavy nuclei, binding energy per nucleon increases with increasing Z. while for light nuclei it decreases with increasing Z.
A current I is passing through a wire having two sections P and Q of uniform diameters d and d/2 respectively. If the mean drift velocity of electrons in sections P and Q is denoted by vP and vQ respectively, then
|
(a) vP = vQ |
(b) vP = |
(c) vP = |
(d) vP = 2 vQ |
A proton enters a magnetic field of flux density 1.5 with a velocity of 2
at an angle of 30° with the field. The force on the proton will be
|
(a) 2.4 |
(b) 0.24 |
(c) 24 |
(d) 0.024 |