Explanation:
þ An emf is induced in the loop is it is rotated about a diameter
þ An emf is induced in the loop if it is deformed.
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The curve drawn between velocity and frequency of photon in vacuum will be a
|
(a) Straight line parallel to frequency axis |
|
(b) Straight line parallel to velocity axis |
|
(c) Straight line passing through origin and making an angle of 45o with frequency axis |
|
(d) Hyperbola |
The 21 cm radio wave emitted by hydrogen in interstellar space is due to the interaction called the hyperfine interaction is atomic hydrogen. the energy of the emitted wave is nearly
|
(a) |
(b) 1 Joule |
(c) 7 |
(d) |
$\text{n}\propto\text{size of u}$
$\text{n}\propto\text{u}^2$
$\text{n}\propto\sqrt{\text{u}}$
$\text{n}\propto\frac{1}{\text{u}}$
What is the respective number of α and β particles emitted in the following radioactive decay 
|
(a) 6 and 8 |
(b) 8 and 8 |
(c) 6 and 6 |
(d) 8 and 6 |
A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be
|
(a) 1840 keV |
(b) 1/1840 keV |
(c) 1 keV |
(d) 920 keV |
Light of wavelength 4000 Å falls on a photosensitive metal and a negative 2V potential stops the emitted electrons. The work function of the material (in eV) is approximately (h = 6.6 
|
(a) 1.1 |
(b) 2.0 |
(c) 2.2 |
(d) 3.1 |
A solenoid has an inductance of 60 henrys and a resistance of 30 ohms. If it is connected to a 100 volt battery, how long will it take for the current to reach 
of its final value
|
(a) 1 second |
(b) 2 seconds |
(c) e seconds |
(d) 2e seconds |
