A periodic voltage has following value for equal time intervals changing suddenl

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Question
A periodic voltage has following value for equal time intervals changing suddenly from one value to next... 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. Then rms value of the waveform is
Options
A. 31 V
B. 32 V
C. insufficient data
D. none of these

Correct Answer

31 V

Explanation

A periodic voltage has following value for equal time intervals changing suddenly from one value to

RMS value = 965 = 31.064 Volt.

Electronic Devices and Circuits problems

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1. As compared to an ordinary semiconductor diode, a Schottky diode
Options
A. has lower cut in voltage
B. has higher cut in voltage
C. lower reverse saturation current
D. both (b) and (c)

2. In a zener diode
Options
A. the forward current is very high
B. sharp breakdown occurs at a certain reverse voltage
C. the ratio v-i can be negative
D. there are two p-n junctions

3. In an n-p-n transistor biased for operation in forward active region
Options
A. emitter is positive with respect to base
B. collector is positive with respect to base
C. base is positive with respect to emitter and collector is positive with respect to base
D. none of the above

4. The power dissipation in a transistor is the product of
Options
A. emitter current and emitter to base voltage
B. emitter current and collector to emitter voltage
C. collector current and collector to emitter voltage
D. none of the above

5. In a degenerate n type semiconductor material, the Fermi level,
Options
A. is in valence band
B. is in conduction band
C. is at the centre in between valence and conduction bands
D. is very near valence band

6. Assertion (A): When a high reverse voltage is applied to a p-n junction the diode breaks down.
Reason (R): High reverse voltage causes Avalanche effect.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

7. An LED has a rating of 2 V and 10 mA. It is used along with 6V battery. The range of series resistance is
Options
A. 0 to 200 ?
B. 200 - 400 ?
C. 200 ? and above
D. 400 ? and above

8. Work function of oxide coated cathode is much lower than that of tungsten cathode.
Options
A. True
B. False

9. Assertion (A): A p-n junction has high resistance in reverse direction.
Reason (R): When a reverse bias is applied to p-n junction, the width of depletion layer increases.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

10. The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm²/sec. The diffusion length is
Options
A. 0.1 cm
B. 0.01 cm
C. 0.0141 cm
D. 1 cm

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