Which of the following substances is magnetic?
(A) Nickel
(B) Aluminum
(C) Bismuth
(D) All of these
Which metal is generally used for making electromagnets?
(A) Copper
(B) Cobalt
(C) Iron
(D) None of these
In what form is heavy water used in a nuclear reactor?
(A) Coolant
(B) Controller
(C) Diluent
(D) Preservative
Which item is used in the fabrication of the transistor?
(A) Silicon
(B) Silver
(C) Aluminum
(D) Copper
X-rays cannot pass through what?
(A) skin
(B) bone
(C) meat
(D) wood
Which colour is formed when Blue and Green are mixed?
(A) Black
(B) Violet
(C) Cyan
(D) Brown
What is the direction of torque?
(A) Opposite to the direction of applied force
(B) Parallel to the radius
(C) Perpendicular to the direction of applied force
(D) Same as the direction of applied force
Instrument for measuring blueness of the sky or ocean is called ___________.
(A) Bathymeter
(B) Ceraunograph
(C) Cyanometer
(D) Barometer
What is the unit of the physical quantity "Inductance"?
(A) weber
(B) farad
(C) henry
(D) tesla
Unit of impedance is ___________.
(A) ohm
(B) henry
(C) tesla
(D) hertz
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