What is silicon?
(A) Insulator
(B) Conductor
(C) Semiconductor
(D) None of these
Who is considered the inventor of the microphone?
(A) Stephen Hawking
(B) Galileo
(C) Graham Bell
(D) None of these
The radius of curvature of a plane mirror is
(A) between one and eternal
(B) zero
(C) One
(D) Eternal
Image is formed in the healthy eye of man?
(A) back and forth of the retina
(B) Ahead of the retina
(C) on the retina
(D) eternal
Which of the following is a non-magnetic material?
(A) Iron
(B) Nickel
(C) Brass
(D) None of these
Write the name who was the inventor of radar.
(A) Fleming
(B) Robert Watson
(C) Austin
(D) Newton
In which direction does the magnetic needlepoint?
(A) North
(B) Akash
(C) East
(D) None of these
What does the color of the sky look like when traveling by air in the sky at high altitude?
(A) Red
(B) Black
(C) Yellow
(D) Blue
A stick inserted in water looks crooked. this is due to ?
(A) Reflection
(B) refraction
(C) Reflection and refraction
(D) None of these
Which of the following is not a unit of mass?
(A) Pound
(B) Dine
(C) Village
(D) kg
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