- Ais zero.
- Bincreases from centre to the surface.
- Cdecreases from centre to the surface.
- Dremains constant from centre to the surface.
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A person A can clearly see objects between 25cm and 200cm. Which of the following may represent the range of clear vision for a person B having muscles stronger than A, but all other parameters of eye identical to that of A?
The impurity atom added to germanium to make it N-type semiconductor is
|
(a) Arsenic |
(b) Iridium |
(c) Aluminium |
(d) Iodine |
Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field B along the line XX’ is given by
|
(a) |
(b) |
(c) |
(d) |
Isotopes are atoms having
|
(a) Same number of protons but different number of neutrons |
|
(b) Same number of neutrons but different number of protons |
|
(c) Same number of protons and neutrons |
|
(d) None of the above |
The magnetic induction in air at a point 1cm away from a long wire that carries a current of 1A, will be
|
(a) |
(b) 2 |
(c) 3 |
(d) 4 |