- A$\beta^-$decay
- B$\beta^+$ decay
- CElectron capture
- DGamma decay
Explanation:
$\beta^-$ decay: $_\text{Z}^\text{A}\text{X}→_{\text{Z}+1}^{\text{A}}\text{Y} + _{−1}^0\text{e}$
Thus, the atomic number is increased in $\beta^-$ decay.
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$\frac{\triangle\text{l}}{\text{l}}$
$\Big(\frac{\triangle\text{l}}{\text{l}}\Big)^2$
$\sqrt{\frac{\triangle\text{l}}{\text{l}}}$
None of these.
Armature current in dc motor will be maximum when
|
(a) Motor has acquired maximum speed |
(b) Motor has acquired intermediate speed |
|
(c) Motor has just started moving |
(d) Motor is switched off |
Assertion : An ac generator is based on the phenomenon of self-induction.
Reason : In single coil, we consider self-induction only.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If assertion is false but reason is true. |
The energy band gap of Si is
|
(a) 0.70 eV |
(b) 1.1 eV |
|
(c) Between 0.70 eV to 1.1 eV |
(d) 5 eV |
In a copper voltameter, mass deposited in 30 second is m gm. If the time-current graph is as shown in figure, ECE of copper is]

|
(a) m |
(b) m/2 |
(c) 0.1 m |
(d) 0.6 m |
A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be
to its value at the centre of the coil, is
|
(a) |
(b) R |
(c) 2 |
(d) |