a2zinterviews

16.	Which among the following is a positively charged particles emitted by a radioactive element?
	A.  Beta ray
	B.  Gamma ray
	C.  Cathode ray
	D.  Alpha ray

17.	Rayon is chemically
	A.  Amylose
	B.  Pectin
	C.  Glucose
	D.  Cellulose

18.	The colour of an opaque object is due to the colour it
	A.  Refracts
	B.  Scatters
	C.  Absorbs
	D.  Reflects

19.	In radar system, generation of power at high frequency needs
	A.  High power magnetron
	B.  High power transformer
	C.  High power antenna
	D.  None of these

20.	Which among the following is a positively charged particles emitted by a radioactive element?
	A.  Alpha ray
	B.  Beta ray
	C.  Gamma ray
	D.  Cathode ray