- AHeating effect of current
- BMagnetic effect of current
- CChemical effect of current
- DPeltier effect of current
Explanation:
Torque acts on the coil due to magnetic field when current flows in it.
Hence, it is based on magnetic effect of current.
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Assertion : When PN-junction is forward biased then motion of charge carriers at junction is due to diffusion. In reverse biasing. The cause of motion of charge is drifting.
Reason : In the following circuit emitter is reverse biased and collector is forward biased.

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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. |
A logic gate is an electronic circuit which
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(a) Makes logic decisions |
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(b) Allows electrons flow only in one direction |
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(c) Works binary algebra |
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(d) Alternates between 0 and 1 values |
The ratio of the intensity at the centre of a bright fringe to the intensity at a point one-quarter of the distance between two fringe from the centre is
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(a) 2 |
(b) 1/2 |
(c) 4 |
(d) 16 |
If an electron enters a magnetic field with its velocity pointing in the same direction as the magnetic field, then
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(a) The electron will turn to its right |
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(b) The electron will turn to its left |
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(c) The velocity of the electron will increase |
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(d) The velocity of the electron will remain unchanged |
A 700 pF capacitor is charged by a 50 V battery. The electrostatic energy stored by it is
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(a) 17.0 |
(b) 13.6 |
(c) 9.5 |
(d) 8.7 |
The coefficient of self inductance of a solenoid is 0.18 mH. If a crode of soft iron of relative permeability 900 is inserted, then the coefficient of self inductance will become nearly
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(a) 5.4 mH |
(b) 162 mH |
(c) 0.006 mH |
(d) 0.0002 mH |
The masses of neutron and proton are 1.0087 a.m.u. and 1.0073 a.m.u. respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass 4.0015 a.m.u. The binding energy of the helium nucleus will be (1 a.m.u.= 931 MeV)
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(a) 28.4 MeV |
(b) 20.8 MeV |
(c) 27.3 MeV |
(d) 14.2 MeV |
$\frac{\text{L}}{\text{T}}$
$\frac{\text{T}}{\text{L}}$
$\frac{\text{L}^2}{\text{T}^2}$
$\frac{\text{T}^2}{\text{L}^2}$
Select the correct alternative, The angle between the normal and refracted ray is called: