ENTRANCE TEST – 2008 | Multiple Questions and Answers

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ENTRANCE TEST – 2008 Multiple Questions and Answers.

21.	In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.

	A.	High Voltage.
	B.	Photon.
	C.	Hole.
	D.	Positron.

22.	For photons of energy greater than 1.02 MeV the probability of pair production occurrence __________ as the energy increases.

	A.	increase.
	B.	Completely Diminishes
	C.	Reduces to half
	D.	Remain unchanged

23.	The neutron is assumed to be made of

	A.	One up quark and two down quarks.
	B.	Two up quarks and two down quarks.
	C.	Two up quarks and one down quark.
	D.	One up quark and one down quark.

24.	An __________ missile is called a ballistic missile.

	A.	Un-powered and guided.
	B.	Un-guided and powered.
	C.	Powered and guided.
	D.	Un-powered and un-guided.

25.	Two cylinders of equal mass are made from same material. The one with the larger diameter accelerates __________ the other under the action of same torque.

	A.	Faster than.
	B.	Slower than.
	C.	Equal to.
	D.	None of these

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