Technical Test-Solved(Source-Indiabix)

Name: ………………………………… Roll No. ……………………

Time: 30 Minutes Marks: 30 Branch: ECE, EEE, EIE

1. What type of waveform is shown in given circuit?

A. Sine wave B. Square wave

C. Triangle wave D. Swatooth wave

2. When a capacitor is fully charged?

A. When voltage across its plates is half of voltage from ground to one of its plates.B. When current through capacitor is same as when capacitor is discharged.C. When voltage across plates is 0.707 of input voltage.D. When current through capacitor is directly proportional to area of plates.

3. Which resistive component is designed to be temperature sensitive?

A. Thermistor B. Reheostat

C. Potentiometer D. Photoconductive cell

4. The primary function of a bias circuit is to

A. hold the circuit stable a Vcc B. hold the circuit stable at Vin

C. ensure proper gain is achieved D. hold the circuit stable at designed Q point

5. How do fixed resistors usually fail?

A. slowly over time B. by increasing their value

C. by becoming an open circuit D. by increasing their value and becoming an open circuit

6. A wiper is the sliding contact in a?

A. switch B. photoconductive cell

C. thermistor D. potentiometer

7. A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can rheostat be set without blowing fuse? Assume a lamp resistance of 20 ohms.

A. 40 Ω B. 4 ΩWestin Electromech Pvt. Ltd.

www.westinelectromech.com

C. 2 Ω D. 20 Ω

8. A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hour of energy does it consume?

A. 20.16 kwh B. 201.6 kwh

C. 2.01 kwh D. 8.4 kwh

9. The parallel combination of a 6.8 kΩ resistor and 10 kΩ resistors is in series with parallel combination of a 2.2 kΩ resistor and 1 kΩ resistor. A 100 V source is connected across circuit. The resistor(s) with greatest voltage drop is (are)

A. 6.8 kΩ B. 2.2 kΩ

C. 6.8 k and 10 kΩ D. 2.2 k and 1 kΩ

10. A steady-state condition is reached when

A. the output voltage reaches average value of input voltageB. the output voltage reaches the input voltageC. the output voltage reaches approximately 63% of input voltage D. the output voltage reaches the effective values of input voltage

11. Which is not a MOSEFT terminal?

A. Gate B. Drain

C. Source D. Base

12. When using an OTA in a Schmitt-trigger configuration, trigger points are controlled by

A. the IOUT B. the IBIAS

C. the VOUT D. both IOUT and IBIAS

13. If a periodic pulse waveform is applied is applied to an RC differentiating circuit, which two conditions are possible?

A. tw 5 or tw > 5 B. tw = 5 or tw > 5

C. tw 5 or tw < 5 D. tw 5 or tw < 5

14. When a 200 load resistor is connected across the secondary winding of a transformer with a turns ratio of 4, the source "sees" a reflective load of

A. 50 B. 12.5

C. 800 D. 0

15. A 12 resistor, a 40 F capacitor, and an 8 mH coil are in series across an ac source. The resonant frequency is

A. 636 B. 3769

C. 433 D. 4337 15 ANS) none of the above it’s 281 Hz(f=1/2(pi)*sqrt(L*C))

Westin Electromech Pvt. Ltd.www.westinelectromech.com