Q1. the refractive index of canada balsam is
(A) 1.95
(B) 1
(C) 2.6
(D) 1.5

Q2. a nichol prism is based on the action of
(A) scattering
(B) dichroism
(C) double refraction
(D) refraction

Q3. which color light has the longest wavelength
(A) yellow
(B) violet
(C) green
(D) red

Q4. when blue glass is heated the color of glow will be
(A) yellow
(B) red
(C) blue
(D) white

Q5. which od the following does not produce radioactive fall out
(A) Atom bomb
(B) Neutron bomb
(C) Hydrogen bomb
(D) Proton bomb

Q6. what is the reciprocal of conductance(G)
(A) inductance
(B) conductance
(C) resistance
(D) capacitance

Q7. Pedagogy is a science which deals with
(A) study of human mind
(B) teaching
(C) weather and climate
(D) production of desired offsprings

Q8. The number of electrons in the outer most orbit of carbon atom is
(A) 2
(B) 4
(C) 6
(D) 8

Q9. Which of the following materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
(A) Varistors
(B) Semi conductors
(C) Thermistor
(D) None of these

Q10. Sparking occurs when a load is switched off because the circuit has high
(A) resistance
(B) inductance
(C) capacitance
(D) impedance

Q11. Nichrome wire is an alloy of
(A) lead and zinc
(B) nickel and chromium
(C) chromium and Gold
(D) copper and silver

Q12. Which of the following material has nearly zero temperature co-efficient of resistance?
(A) Porcelain
(B) Manganin
(C) Carbon
(D) Copper

Q13. The insulation on a current carrying conductor is provided
(A) to prevent leakage of current
(B) to prevent shock
(C) both of these
(D) None of these

Q14. Out of the following which is an insulating material?
(A) Silver
(B) Paper
(C) Copper
(D) Gold

Q15. which made filament of electric bulb.
(A) tungsten
(B) aluminium
(C) copper
(D) nickel

Q16. resistance is reciprocal
(A) conductance
(B) admittance
(C) permeance
(D) capacitance

Q17. S.I. Unit of power.
(A) ampere
(B) kilogram
(C) hertz
(D) watt

Q18. Which of the following is the passive element.
(A) Capacitance
(B) Current source
(C) Voltage source
(D) all of these

Q19. which is widely used in academic testing ?
(A) smr
(B) osr
(C) omr
(D) ofr

Q20. Among the following the weakest binding is
(A) metallic
(B) covalent
(C) ionic
(D) wander wasls

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