- AAttract each other.
- BRepel each other.
- CDo not attract each other.
- DGet rotated to be perpendicular to each other.
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If is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled
|
(a) |
(b) |
(c) 2 |
(d) 4 |
A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2 : 1. What will be the ratio of their nuclear size (nuclear radius)
|
(a) |
(b) 1 : |
(c) |
(d) 1 : |
The magnet can be completely demagnetized by
|
(a) Breaking the magnet into small pieces |
|
(b) Heating it slightly |
|
(c) Droping it into ice cold water |
|
(d) A reverse field of appropriate strength |
The radii of two metallic spheres P and Q are and
respectively. They are given the same charge. If
. then on connecting them with a thin wire, the charge will flow
|
(a) From P to Q |
|
(b) From Q to P |
|
(c) Neither the charge will flow from P to Q nor from Q to P |
|
(d) The information is incomplete |
Two infinite plane parallel sheets separated by a distance d have equal and opposite uniform charge densities σ. Electric field at a point between the sheets is
|
(a) Zero |
(b) |
|
(c) |
(d) Depends upon the location of the point |
In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and a = 0.98
|
(a) 0.04 mA |
(b) 1.96 mA |
(c) 0.98 mA |
(d) 2 mA |
A lens which has focal length of 4 cm and refractive index of 1.4 is immersed in a liquid of refractive index 1.6, then the focal length will be
|
(a) – 12.8 cm |
(b) 32 cm |
(c) 12.8 cm |
(d) – 32 cm |
For which of the following colour, the magnifying power of a microscope will be maximum
|
(a) White colour |
(b) Red colour |
(c) Violet colour |
(d) Yellow colour |
Which of the following cannot be seen by a microscope?