An alpha particle is accelerated through a potential difference of 
. Its kinetic energy will be
|
(a) 1 MeV |
(b) 2 MeV |
(c) 4 MeV |
(d) 8 MeV |
(b) 2 MeV
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An ideal coil of 10 henry is joined in series with a resistance of 5 ohm and a battery of 5 volt. 2 second after joining, the current flowing in ampere in the circuit will be
|
(a) |
(b) |
(c) (1 – e) |
(d) e |
Consider the charge configuration and spherical Gaussian surface as shown in the figure. When calculating the flux of the electric field over the spherical surface the electric field will be due to
|
(a) |
(b) Only the positive charges |
|
(c) All the charges |
(d) + |
Which of the following statement is wrong
|
(a) Infrared photon has more energy than the photon of visible light |
|
(b) Photographic plates are sensitive to ultraviolet rays |
|
(c) Photographic plates can be made sensitive to infrared rays |
|
(d) Infrared rays are invisible but can cast shadows like visible light rays |
In Young’s double slit experiment, distance between two sources is 0.1 mm. The distance of screen from the sources is 20 cm. Wavelength of light used is 5460 Å. Then angular position of the first dark fringe is
|
(a) 0.08° |
(b) 0.16° |
(c) 0.20° |
(d) 0.313° |
The two waves represented by y1 = a sin(wt) and 
have a phase difference of
|
(a) 0 |
(b) |
(c) |
(d) |
