Physics MCQs

Page No. 16

Electron moves in the orbit as________________?


aSimple vibratory motion

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bStanding wave motion

✓


cVibratory motion like up and down

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dS.H.M likes the sound

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View Answer Standing wave motion

Compton effect proves the________________?


aPhoton theory of light

✓


bDual nature of light

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cWave nature of light

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dUncertain nature of light

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The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?


a Karl-Weins law

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bRayleigh-Jeans law

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cStephens law

✓


dPlancks

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View Answer Stephens law

For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?


a107m/sec

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bShould be greater than the speed of light.

✓


cBe zero

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dNot be wave-like

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The uncertainty in momentum & position is due to its_____________?


aProperty of matter and radiation

✓


bTwo-dimensional motion

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cEmission of the certain wavelength

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dVery high velocity

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A three-dimensional image is obtained by________________?


aElectron microscope

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bScanning electron microscope

✓


cMagnetic imaging

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dNone of the above

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In the electron microscope, electric & magnetic fields are used as_______________?


aElectromagnetic gun

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b Source of electromagnetic waves

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cDeflecting charged particle

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dConverging source of electrons

✓



In an electron microscope, we use energetic particles because of______________?


aPenetrating power is high

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bKinetic energy is large

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cWavelength is very short

✓


dAll the above reasons

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If a diffraction grating is placed in the path of a light beam it reveals______________?


aWave property

✓


bParticle property

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cEnergy particle

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dElectromagnetic wave property

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View Answer Wave property

In Davisson-Germer experiment the diffracted proton from crystal shows______________?


aParticle property

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bWave property

✓


c Light property

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dQuantum property

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View Answer Wave property

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