Physics - Mock Test 29

Question 281

The existence of Ether wind was experimentally rejected by?

A) equal to its rest mass B) double of its rest mass C) infinite D) zero

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Question 282

Select an alternative from of uncertainly principle from the following?

A) ?? = h/m?c(1-cos ?) B) ?E . ?t = h C) mc2 = hv D) any of above

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Question 283

Stopping potential for a metal surface in case of photoelectric emission depends on?

A) the threshold frequency for the metal surface B) the intensity of incident light C) the frequency of incident light and work function of the metal surface D) all of the above

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Question 284

The linear momentum of an X-ray photon of wavelength 0.1A is?

A) 6.625x1023N-s B) 66.25x1023N-s C) 662.5x1023N-s D) data is insufficient

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Question 285

A device based on photoelectric effect is called?

A) photo sensitive detection B) photo diode C) photosynthesis D) photo cell

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Question 286

Which one of the following radiations has the strongest photon?

A) T.V waves B) micro waves C) X-rays D) ?-rays

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Question 287

0.001 kg mass will be equivalent to?

A) 2.50 GWh B) 25.00 GWh C) 0.26 GWh D) 250 GWh

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Question 288

An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is?

A) greater than one meter B) less than one meter C) one meter D) a foolish question

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Question 289

The relativistic energy E is equivalent to relativistic mass given by?

A) Ec2 B) E/c2 C) E/c D) c2/E

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Question 290

Tick the correct statement?

A) the flight path of a vertically falling body appears straight to the stationary observer B) the flight path of vertically falling body appears parabolic to an observer in uniform relative motion C) all states of rest and motion are relative and there is no such thing as absolute motion D) all the above

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