Karnatak University 2007 Science - Question Paper

PART - A
Four options are provided for every of the subsequent ques. / incomplete
statements. Only 1 of them is accurate or most improper. select the most
improper option and write it in the space given beneath every ques..
39 × one = 39
1. A phenomenon in which magnetic field produces electric current in a conductor is
(A) Magnetic effect (B) Chemical effect
(C) Electromagnetic induction (D) Photoelectric effect.
Ans :
3 83-E
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26100 [ Turn over
2. A device converting mechanical energy into electrical energy is
(A) Dry cell
(B) Motor
(C) Dynamo
(D) Solar cell.
Ans :
3. Which 1 of the subsequent can do photoelectric effect from most of the elements ?
(A) Gamma radiation
(B) Common light
(C) Ultraviolet rays
(D) X-rays.
Ans :
4. The electromagnetic waves that stimulate blood circulation are
(A) Radio waves
(B) Infrared rays
(C) Gamma rays
(D) X-rays.
Ans :
5. The element used extensively in electronic instruments is
(A) Phosphorus
(B) Boron
(C) Aluminium
(D) Silicon.
Ans :
6. Which of the subsequent are the sides of diode ?
(A) Anode-Emitter
(B) Emitter-Collector
(C) Anode-Cathode
(D) Cathode-Emitter.
Ans :
7. Which 1 of the subsequent is the circuit symbol of p-n-p transistor ?
(A) (B)
(C) (D)
Ans :
8. Which 1 of the subsequent is responsible for separation of particles of various
densities in a centrifuge ?
(A) Centrifugal force
(B) Centrifugal reaction
(C) Centripetal force
(D) Centripetal reaction.
Ans :
9. If a string whirling with a stone snaps, then the motion of stone will be
(A) in identical circular motion
(B) towards centre
(C) in the direction of tangent
(D) in the extending ( expanding ) circular path.
Ans :
10. The force of attraction ranging from any 2 objects is not related to the
(A) physical nature of objects
(B) mass of the objects
(C) distance ranging from the objects
(D) force acting along the line joining 2 objects.
Ans :
11. Weightlessness is experienced in which of the subsequent situations ?
(A) Travelling in aircraft
(B) Moving in upward direction in a lift
(C) Moving up in a giant wheel
(D) In a spacecraft orbiting around the earth.

Earning:   Approval pending.