- AThe diode is in its forward conducting state.
- BThe diode is in its reverse non-conducting state.
- CThere is no potential difference between the anode and cathode.
- DNone of these
Explanation:
In a semiconductor diode, when diode in its forward conducting state current starts in diode and depletion region starts to deformed. After sometime depletion region is removed.
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The electric field at a point on equatorial line of a dipole and direction of the dipole moment
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(a) Will be parallel |
(b) Will be in opposite direction |
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(c) Will be perpendicular |
(d) Are not related |
Kα wavelength emitted by an atom of atomic number Z = 11 is λ. Find the atomic number for an atom that emits Kα radiation with wavelength 4l
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(a) Z = 6 |
(b) Z = 4 |
(c) Z = 11 |
(d) Z = 44 |
Assertion : A spark occur between the poles of a switch when the switch is opened.
Reason : Current flowing in the conductor produces magnetic field.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
$\lambda_\text{a}>\lambda_\text{f}$
$\lambda_\text{a}=\lambda_\text{f}$
$\lambda_\text{a}<\lambda_\text{f}$
The equivalent resistance of the arrangement of resistances shown in adjoining figure between the points A and B is

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(a) 6 ohm |
(b) 8 ohm |
(c) 16 ohm |
(d) 24 ohm |
The north pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of the induced current in the conducting plane will be
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(a) Horizontal |
(b) Vertical |
(c) Clockwise |
(d) Anticlockwise |