| May 2nd, 2017 10:46 AM | |
| Vishal Kotkar | Re: bsnl-jto questions with answers BSNL Conducts the JTO Exam for the Recruitment of the Junior Telecom Operator in the BSNL As you Asking for the Question Paper of the BSNL JTO Exam With Solution the Question Paper is As Follows If the voltage applied across a capacitance is triangular in waveform then the waveform of the current is- a) Triangular b) Trapezoidal c) Sinusoidal d) Rectangular Answer is :- Rectangular 1. One of the following statement which is true for relative dielectric constant is - a) It is dimensionless b) It is not equal to unity for vacuum c) It's value for all substances is less than one d) None Answer is :- It is dimensionless 2. Pure metals generally have- a) high conductivity and low temperature coefficient b) high conductivity and large temperature coefficient c) low conductivity and zero temperature coefficient d) low conductivity and high temperature coefficient Answer is :- high conductivity and large temperature coefficient 3. For small size, high frequency coils, the most common core material is a) Air b) Ferrite c) Powdered ion d) Steel Answer is :- Air 4. For an abrupt junction Varactor diode, the dependence of device capacitance (C) on applied reverse bias (V) is given by- a) C a V1/3 b) C a V-1/3 c) C a V1/2 d) C a V-1/2 Answer is :- C a V-1/3 5. A superconductor is a- a) A material showing perfect conductivity and Meissner effect below a critical temperature b) A conductor having zero resistance c) A perfect conductor with highest dimagnetic susceptibility d) A perfect conductor which becomes resistive when the current density through it exceeds a critical valueAnswer is :-A material showing perfect conductivity and Meissner effect below a critical temperature 6. When a semiconductor based temperature transducer has a temperature coefficient of " 2500 mV/0C then this transducer is indeed a- a) Thermistor b) Forward biased pn junction diode c) Reverse biased pn junction diode d) FET Answer is :- Forward biased pn junction diode 7. The location of lightning arrestor is - a) Near the transformer b) Near the circuit breaker c) Away from the transformer d) None Answer is :- Near the transformer 8. Time constant of an RC circuit increases if the value of the resistance is - a) Increased b) Decreased c) Neither a nor b d) Both a and b Answer is :- Increased 9. Intrinsic semiconductors are those which - a) Are available locally b) Are made of the semiconductor material in its purest from c) Have more electrons than holes d) Have zero energy gaps Answer is :- Are made of the semiconductor material in its purest from 10. The primary control on drain current in a JFET is exerted by - a) Channel resistance b) Size of depletion regions c) Voltage drop across channel d) Gate reverse bias Answer is :- Gate reverse bias 11. The electrical conductivity of metals which is expressed in ohm-1 m-1 is of the order of - a) 1010 b) 105 c) 10-4 d) 10-6 Answer is :- 105 12. When biased correctly, a zener diode " a) acts as a fixed resistance b) has a constant voltage across it c) has a constant current passing through it d) never overheats Answer is :- has a constant voltage across it 13. The current amplification factor adc is given by " a) IC/IE b) IC/IB c) IB/IC d) IB/IC Answer is :- IC/IE 14. Compared to bipolars, FETs have- a) high input impedance b) low input impedance c) same input impedance d) none Answer is :- high input impedance 15. The source-drain channel of JFET is - a) ohmic b) bilateral c) unilateral d) both a and b Answer is :- both a and b 16. diac is equivalent to a - a) Pair of SCRs b) Pair of four layer SCRs c) Diode and two resistors d) Triac width Answer is :- Pair of four layer SCRs 17. When a sample of N type semiconductor has electron density of 6.25 ´ 1011 /cm3 at 300K and if the intrinsic concentration of carriers in this sample is 2.5 ´ 1013/cm3 then the hole density will be " a) 106/cm3 b) 103/ cm3 c) 1010/ cm3 d) 1012/ cm3 Answer is :- 103/ cm3 18. The statement 'In any network of linear impedances, the current flowing at any point is equal to the algebraic sum of the currents caused to flow at that point by each of the sources of emf taken separately with all other emf's reduced to zero' represents - a) Kirchhoff's law b) Norton's theorem c) Thevenin's theorem d) Superposition theorem Answer is :- Superposition theorem 19. One of the following modes which has the characteristics of attenuation becoming less as the frequency is increased and is attractive at icrowave frequencies of circular cylindrical wave guides is " a) TE1 mode b) TM01 mode c) TE01 mode d) Higher order mode Answer is :- TE01 mode 20. A two-port network is symmetrical if " a) z11z22 " z12z21 = 1 b) h11h22 " h12h21 = 1 c) AD " BC = 1 d) y11y22 " y12y21 = 1 Answer is :-AD " BC = 1 |
| May 2nd, 2017 10:45 AM | |
| Unregistered | Re: bsnl-jto questions with answers Hii sir, I Am Preparing for the BSNL JTO Examination Will you Please provide me the Sample Question Paper With Solution of the BSNL JTO Examination ? |
| June 7th, 2016 04:56 PM | |
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