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A proton and a deutron both having the same kinetic energy, enter perpendicularly into a uniform magnetic field B. For motion of proton and deutron on circular path of radius 
and 
respectively, the correct statement is
|
(a) |
(b) |
(c) |
(d) |
Wires P and Q have the same resistance at ordinary (room) temperature. When heated, resistance of P increases and that of Q decreases. We conclude that
|
(a) P and Q are conductors of different materials |
|
(b) P is N-type semiconductor and Q is P-type semiconductor |
|
(c) P is semiconductor and Q is conductor |
|
(d) P is conductor and Q is semiconductor |
A thin lens with focal length f to be used as magnifying glass. Which of the following statements regarding the situation is true?
A 100% efficient transformer has 100 turns in the primary and 25 turns in its secondary coil. If the current in the secondary coil is 4 amp, then the current in the primary coil is
|
(a) 1 amp |
(b) 4 amp |
(c) 8 amp |
(d) 16 amp |
The line joining the pole and the centre of curvature of a mirror is called the:
In the adjoining circuit diagram each resistance is of 10 W. The current in the arm AD will be
|
(a) |
(b) |
(c) |
(d) |
There are certain material developed in laboratories which have a negative refractive index (Fig). A ray incident from air (medium 1) into such a medium (medium 2) shall follow a path given by:
