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Physics

Physics
The energy of a photon varies directly with its

Speed
Wave length
None of these
Frequency

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Physics
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will

Decrease
Remain unaffected
Increase
Have its shape changed

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Physics
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

LUV < lIR < lVIS
LUV > lIR > lVIS
LUV < lVIS < lIR
LUV > lVIS > lIR

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Physics
The waveform of a certain signal can be studied by

P – n junction diode
Spectrometer
Cathode ray oscilloscope
Sonometer

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Physics
Lux is the SI unit of

luminous intensity
luminous efficiency
luminous flux
intensity of illumination

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Physics
If a body moves with a constant speed in a circle

No work is done on it
Its velocity remains constant
No acceleration is produced in it
No force acts on it

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