In an interference experiment, the spacing between successive maxima or minima is (Where the symbols have their usual meanings)
|
(a) |
(b) |
(c) |
(d) |
(b) 
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The tangent galvanometer, when connected in series with a standard resistance can be used as
|
(a) An ammeter |
(b) A voltmeter |
|
(c) A wattmeter |
(d) Both an ammeter and a voltmeter |
The de-Broglie wavelength l
|
(a) is proportional to mass |
(b) is proportional to impulse |
|
(c) Inversely proportional to impulse |
(d) does not depend on impulse |
$\frac{\text{W}}{2}$
$2^{\frac{1}{3}}$ W at the planet.
At what distance from a convex lens of focal length 30 cm, an object should be placed so that the size of the image be 1/2 of the object
|
(a) 30 cm |
(b) 60 cm |
(c) 15 cm |
(d) 90 cm |
