During negative b - decay
|
(a) Neutron converts into proton |
(b) Proton converts into neutron |
|
(c) Neutron proton ratio increases |
(d) None of these |
During negative b - decay
|
(a) Neutron converts into proton |
(b) Proton converts into neutron |
|
(c) Neutron proton ratio increases |
(d) None of these |
(a) Neutron converts into proton
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Two charges +3.2 and -3.2
kept 2.4 Å apart forms a dipole. If it is kept in uniform electric field of intensity 4
then what will be its electrical energy in equilibrium
|
(a) + 3 |
(b) -3 |
(c) -6 |
(d) -2 |
In case of NPN-transistors the collector current is always less than the emitter current because
|
(a) Collector side is reverse biased and emitter side is forward biased |
|
(b) After electrons are lost in the base and only remaining ones reach the collector |
|
(c) Collector side is forward biased and emitter side is reverse biased |
|
(d) Collector being reverse biased attracts less electrons |
The radius of curvature of convex surface of a thin plano-convex lens is 15 cm and refractive index of its material is 1.6. The power of the lens will be
|
(a) + 1D |
(b) -2D |
(c) +3D |
(d) +4D |
A coil of area 80 square cm and 50 turns is rotating with 2000 revolutions per minute about an axis perpendicular to a magnetic field of 0.05 Tesla. The maximum value of the e.m.f. developed in it is
|
(a) 200π volt |
(b) |
(c) |
(d) |