- ANuclear fission
- BNuclear fusion
- CNuclear fission & fusion
- DNuclear decay
Explanation:
Stellar and solar energy is due to fusion reactions. So, source of stellar energy is Nuclear fusion.
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The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is
|
(a) Covalent |
(b) Metallic |
(c) Dipolar |
(d) Ionic |
$\text{m}\omega^2\text{l}$
$\text{Zero.}$
$\text{mg}$
$\frac{1}{2}\text{m}\omega^2\text{l}$
A gate in which all the inputs must be low to get a high output is called
|
(a) A NAND gate |
(b) An inverter |
(c) A NOR gate |
(d) An AND gate |
The magnetic compass is not useful for navigation near the magnetic poles because
|
(a) The magnetic field near the poles is zero |
|
(b) The magnetic field near the poles is almost vertical |
|
(c) At low temperature, the compass needle looses its magnetic properties |
|
(d) Neither of the above |
Which of the following quantities increase when wavelength is increased? Consider only the magnitudes.
Ultraviolet radiations of 6.2eV falls on an aluminium surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is approximately
|
(a) 3.2 |
(b) 3.2 |
(c) 3.2 |
(d) 3.2 |

Figure represents the graph of photo current I versus applied voltage (V). The maximum energy of the emitted photoelectrons is

|
(a) 2eV |
(b) 4 eV |
(c) 0 eV |
(d) 4 J |