Figure (i) shows a conducting loop being pulled out of a magnetic field with a speed v. Which of the four plots shown in figure (ii) may represent the power delivered by the pulling agent as a function of the speed v
|
(a) a |
(b) b |
(c) c |
(d) d |
(b) b
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The potential difference across the 100 W resistance in the following circuit is measured by a voltmeter of 900 W resistance. The percentage error made in reading the potential difference is
|
(a) |
(b) 0.1 |
(c) 1.0 |
(d) 10.0 |
Which of the following cannot cause fission in a heavy nucleus
| (a) a-particle | (b) Proton | (c) Deutron | (d) Laser rays |
The idea of secondary wavelets for the propagation of a wave was first given by
|
(a) Newton |
(b) Huygen |
(c) Maxwell |
(d) Fresnel |
A rocket is going away from the earth at a speed of 106 m/s If the wavelength of the light wave emitted by it be 5700 Å, what will be its Doppler's shift
|
(a) 200 Å |
(b) 19 Å |
(c) 20 Å |
(d) 0.2 Å |
A nucleus with mass number 220 initially at rest emits an a-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the a-particle
|
(a) 4.4 MeV |
(b) 5.4 MeV |
(c) 5.6 MeV |
(d) 6.5 MeV |
