Q1. The relative permeability of ferromagnetic material is
(A) 1
(B) less than 1
(C) more than 1000
(D) None of these


Q2. A clearly separate echo of a sound is heard when the minimum distance of the reflecting surface from the source of sound is
(A) 34m
(B) 17m
(C) 100m
(D) 10m


Q3. output of laser beam is
(A) infrared
(B) polarised
(C) narrow beam
(D) coherent


Q4. Admittance is reciprocal of
(A) Susceptance
(B) Impedance
(C) Reactance
(D) Conductance


Q5. SI unit of electric current
(A) Coulomb
(B) Joule
(C) Ampere
(D) None


Q6. the strength of a semi conductor crystal comes from?
(A) forces between nuclei
(B) forces between protons
(C) electron pair bonds
(D) none of the above


Q7. which one of the following not a unit of length ?
(A) light year
(B) parsec
(C) shake
(D) meter


Q8. which one of the following a unit less quantity?
(A) angle
(B) refractive index
(C) angular displacent
(D) gas constant


Q9. forbidden gap for Si
(A) 1.5 ev
(B) 1.1 ev
(C) 0.7 ev
(D) 0.3 ev


Q10. The minimum distance between the source and the reflector for hearing a distance echo is
(A) 13
(B) 18
(C) 17
(D) 16


Q11. when material become a superconductivity its resistance become what is the value?
(A) 0
(B) 1
(C) 0.2
(D) 1.5


Q12. ML-1 T-2 IS DIMENSIONAL FORMULA OF
(A) MODULUS OF ELASTICITY
(B) MODULUS OF ENERGY
(C) MODULUS OF CURRENT
(D) NONE OF ABOVE


Q13. Piezo is a greek word for
(A) Force
(B) velocity
(C) Momentum
(D) Pressure


Q14. Unit work is
(A) henry
(B) joule
(C) watt
(D) volt-metre


Q15. Unit of capacitance is
(A) farad
(B) Henry
(C) watt
(D) mho


Q16. what is the unit of resistance ?
(A) ohm
(B) mho
(C) Kelvin
(D) rho


Q17. An oscillator that is most stable having simple circuit is
(A) Crystal
(B) Armstrong
(C) Clapp
(D) Colpitts


Q18. which of the following piezoelectric material can be used for very high frequencies
(A) Tourmaline
(B) Rochelle salt
(C) Quartz
(D) All of these


Q19. Which of the following substance shows least permeability
(A) Nickel
(B) Iron
(C) Gold
(D) Aluminium


Q20. Permanent magnets are used in
(A) Motor
(B) Transformer
(C) Moving coil instruments
(D) Buzzers


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