MCQ
Reciprocal of Impedance is:
- ASusceptance
- BConductance
- CAdmittance
- DTransconductance
Explanation:
Impedance is the opposition a circuit presents to a current when a voltage is applied.
Admittance is a measure of how easily a circuit or device will allow a current to flow.
Admittance is defined as $\text{Y}=\frac{1}{\text{Z}}$
where Z is the impedance of the circuit.
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In helium nucleus, there are
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(a) 2 protons and 2 electrons |
(b) 2 neutrons, 2 protons and 2 electrons |
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(c) 2 protons and 2 neutrons |
(d) 2 positrons and 2 protons |
Assertion : If the distance between parallel plates of a capacitor is halved and dielectric constant is made three times, then the capacitor becomes 6 times.
Reason : Capacity of the capacitor does not depend upon the nature of the material.
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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. |
Assertion : Owls can move freely during night.
Reason : They have large number of rods on their retina.
|
(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. |
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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. |
In charging a battery of motor-car, the following effect of electric current is used
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(a) Magnetic |
(b) Heating |
(c) Chemical |
(d) Induction |
If scattering particles are 56 for 90° angle then this will be at 60° angle
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(a) 224 |
(b) 256 |
(c) 98 |
(d) 108 |
Particle nature and wave nature of electromagnetic waves and electrons can be shown by
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(a) Electron has small mass, deflected by the metal sheet |
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(b) X-ray is diffracted, reflected by thick metal sheet |
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(c) Light is refracted and defracted |
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(d) Photoelectricity and electron microscopy |