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Physics

Physics
Radiocarbon dating technique is used to estimate the age of

monuments
fossils
rocks
soil

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Physics
If velocity is constant then acceleration is what?

Infinite
Zero
Increasing
Constant

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

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Physics
Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?

The heavier mass will reach greater height
The lighter mass will reach greater height
Any of them may reach greater height
Both will reach the same height

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Physics
Magnetism at the centre of a bar magnet is

maximum
minimum or maximum
zero
minimum

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Physics
The threshold frequency is the frequency below which :

Photo current decreases with voltage
Photo electric emission is not possible
Photo current is constant
Photo current increases with voltage

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