- Asuperconductor
- Bgood semiconductor
- ✓ideal insulator
- Dconductor
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The positive temperature coefficient of resistance is for
|
(a) Carbon |
(b) Germanium |
(c) Copper |
(d) An electrolyte |
A magnet of magnetic moment 20 C.G.S. units is freely suspended in a uniform magnetic field of intensity 0.3 C.G.S. units. The amount of work done in deflecting it by an angle of 30o in C.G.S. units is
|
(a) 6 |
(b) 3 |
(c) 3(2 - |
(d) 3 |
As our eyes can not retrace the bent path of light, a stick, dipped in water, appears:
In a certain double slit experimental arrangement interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength 6000 Å, the fringe width will be
|
(a) 0.5 mm |
(b) 1.0 mm |
(c) 1.2 mm |
(d) 1.5 mm |