Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors 
and 
respectively is such that 
equals to
|
(a) 0.5 |
(b) 1.0 |
(c) 1.5 |
(d) 2.0 |
(d) 2.0
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An air bubble in sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If amg = 1.5, the distance of bubble from refracting surface is
|
(a) 1.2 cm |
(b) 3.2 cm |
(c) 2.8 cm |
(d) 1.6 cm |
Two similar spheres having +q and -q charge are kept at a certain distance. F force acts between the two. If in the middle of two spheres, another similar sphere having +q charge is kept, then it experience a force in magnitude and direction as
|
(a) Zero having no direction |
(b) 8F towards +q charge |
|
(c) 8F towards -q charge |
(d) 4F towards +q charge |
The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is
|
(a) 1.215 |
(b) 1.215 |
(c) 1.215 |
(d) 1.215 |
A dip circle is at right angle to the magnetic meridian. What will be the apparent dip
| (a) 0° | (b) 30° | (c) 60° | (d) 90° |
In the position of minimum deviation when a ray of yellow light passes through the prism, then its angle of incidence is
|
(a) Less than the emergent angle |
|
(b) Greater than the emergent angle |
|
(c) Sum of angle of incidence and emergent angle is 90° |
|
(d) Equal to the emergent angle |
Resistance as shown in figure is negative at
|
(a) A |
(b) B |
(c) C |
(d) None of these |
A current flows in a conductor from east to west. The direction of the magnetic field at a points above the conductor is .....
|
(a) Towards north |
(b) Towards south |
(c) Towards east |
(d) Towards west |
