A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is
| (a) Greater than at Q |
| (b) Same as at Q |
| (c) Less than at Q |
| (d) Greater or less than at Q depending upon the strength of the current |
(b) Same as at Q
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The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young’s double-slit experiment is
|
(a) Infinite |
(b) Five |
(c) Three |
(d) Zero |
Fission of nuclei is possible because the binding energy per nucleon in them
|
(a) Increases with mass number at high mass numbers |
|
(b) Decreases with mass number at high mass numbers |
| (c) Increases with mass number at low mass numbers |
| (d) Decreases with mass number at low mass numbers |
A charge q is placed at the centre of the open end of cylindrical vessel. The flux of the electric field through the surface of the vessel is
|
(a) Zero |
(b) |
(c) |
(d) |
When a compact disc is illuminated by a source of white light. Coloured 'lanes' are observed. This is due to
|
(a) Dispersion |
(b) Diffraction |
(c) Interference |
(d) Refraction |
Which of the following wavelength falls in X-ray region
|
(a) 10000 Å |
(b) 1000 Å |
(c) 1 Å |
(d) 10–2 Å |
The shows two NAND gates followed by a NOR gate. The system is equivalent to the following logic gate
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| (a) OR | (b) AND | (c) NAND | (d) None of these |
