Kinetic energy of emitted cathode rays is dependent on
|
(a) Only voltage |
|
(b) Only work function |
|
(c) Both (a) and (b) |
|
(d) It does not depend upon any physical quantity |
(c) Both (a) and (b)
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A negatively charged plate has charge density of 2 
. The initial distance of an electron which is moving toward plate, cannot strike the plate, if it is having energy of 200 eV
|
(a) 1.77 mm |
(b) 3.51 mm |
(c) 1.77 cm |
(d) 3.51 cm |
Light passes successively through two polarimeters tubes each of length 0.29m. The first tube contains dextro rotatory solution of concentration 60kgm–3 and specific rotation 0.01rad m2kg–1. The second tube contains laevo rotatory solution of concentration 30kg/m3 and specific rotation 0.02 radm2kg–1. The net rotation produced is
|
(a) 15° |
(b) 0° |
(c) 20° |
(d) 10° |
A nucleus of atomic mass A and atomic number Z emits β - particles. The atomic mass and atomic number of the resulting nucleus are
|
(a) A, Z |
(b) A + 1, Z |
(c) A, Z + 1 |
(d) A – 4, Z - 2 |
In diode, when there is saturation current, the plate resistance (
is
|
(a) Zero |
(b) Infinite |
|
(c) Some finite quantity |
(d) Data is insufficient |
Consider two point charges of equal magnitude and opposite sign separated by a certain distance. The neutral point due to them
|
(a) Does not exist |
|
(b) Will be in mid way between them |
|
(c) Lies on the perpendicular bisector of the line joining the two |
|
(d) Will be closer to the negative charge |