Explanation:
$\text{X}_\text{C}=\frac{1}{\text{C}\omega}=10000\Omega$
ammeater reading $=\text{I}_\text{rms}=\frac{\text{V}_\text{rms}}{\mid\text{jX}_\text{c}\mid}=\frac{50}{10000}=5\text{mA}$
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The correct order of ionizing capacity of α, β and γ - rays is
|
(a) α > γ > β |
(b) α > β > γ |
(c) α < β <γ |
(d) α > β > γ |
Zener breakdown in a semi-conductor diode occurs when
|
(a) Forward current exceeds certain value |
(b) Reverse bias exceeds certain value |
|
(c) Forward bias exceeds certain value |
(d) Potential barrier is reduced to zero |
Two metal spheres of capacitance 
and 
carry some charges. They are put in contact and then separated. The final charges 
and 
on them will satisfy
|
(a) |
(b) |
(c) |
(d) |
Assertion : Photosensitivity of a metal is high if its work function is small.
Reason : Work function = 
where 
is the threshold frequency.
|
(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 the assertion and reason both are false. |
In the lowest energy level of hydrogen atom, the electron has the angular momentum
|
(a) |
(b) h/ |
(c) h/2 |
(d) |
