Angular width (b) of central maximum of a diffraction pattern on a single slit does not depend upon
|
(a) Distance between slit and source |
(b) Wavelength of light used |
|
(c) Width of the slit |
(d) Frequency of light used |
(a) Distance between slit and source
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At a certain place, the horizontal component of earth's magnetic field is 
times the vertical component. The angle of dip at that place is
| (a) 60° | (b) 45° | (c) 90° | (d) 30° |
To draw maximum current from a combination of cells, how should the cells be grouped
|
(a) Series |
|
(b)Parallel |
|
(c) Mixed |
|
(d) Depends upon the relative values of external and internal resistance |
A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m. The power of the lens is
|
(a) + 10 dioptres |
(b) – 10 dioptres |
(c) – 5 dioptres |
(d) +5 dioptres |
In case of a real and inverted image, the magnification created by the mirror is:
A current of 2.0 ampere passes through a cell of e.m.f. 1.5 volts having internal resistance of 0.15 ohm. The potential difference measured, in volts, across both the ends of the cell will be
|
(a) 1.35 |
(b) 1.50 |
(c) 1.00 |
(d) 1.20 |
Five resistances are connected as shown in the figure. The effective resistance between the points A and B is
|
(a) |
(b) |
(c) 15 Ω |
(d) 6 Ω |
To convert a galvanometer into a voltmeter, one should connect a
|
(a) High resistance in series with galvanometer |
|
(b) Low resistance in series with galvanometer |
|
(c) High resistance in parallel with galvanometer |
|
(d) Low resistance in parallel with galvanometer |
The velocity factor of a transmission line x. If dielectric constant of the medium is 2.6, the value of x is
|
(a) 0.26 |
(b) 0.62 |
(c) 2.6 |
(d) 6.2 |
