Discussion
Home ‣ Electronics ‣ Flip-Flops and Timers See What Others Are Saying!
- Question
The S-R, D-type, and J-K flip-flops are all examples of _________________.
Options- A. astable multivibrators
- B. bistable multivibrators
- C. monostable multivibrators
- D. tristable multivibrators
- Correct Answer
- bistable multivibrators
- 1.
If the voltage in the given circuit was cut in half, what would the current equal?
Options- A. 10 mA
- B. 30 mA
- C. 60 mA
- D. 90 mA Discuss
- 2. A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 Ω load. What is the efficiency of the transformer?
Options- A. 88%
- B. 90%
- C. 92%
- D. 95% Discuss
- 3. If four 90 Ω resistors are connected in series across an 18 V source, the current equals ___.
Options- A. 50 mA
- B. 0.2 A
- C. 5 A
- D. 20 A Discuss
- 4. Often a common-collector will be the last stage before the load; the main function of this stage is to
Options- A. provide voltage gain
- B. buffer the voltage amplifiers from the low-resistance load
- C. provide phase inversion
- D. provide a high-frequency path to improve the frequency response Discuss
- 5. In practical applications, battery voltage:
Options- A. is restored as soon as disconnect occurs
- B. is lowered as the load increases
- C. may be stored indefinitely
- D. will be reduced to zero as power is drawn Discuss
- 6. A good fuse will have:
Options- A. zero ohms resistance
- B. a medium resistance
- C. a high resistance
- D. an infinite resistance Discuss
- 7. A(n) ________ converts an analog input to a digital output.
Options- A. flash converter
- B. bipolar converter
- C. ADC
- D. DAC Discuss
- 8. A mathematical operation for finding the area under the curve of a graph is called __________.
Options- A. differentiation
- B. integration
- C. curve averaging
- D. linear regression Discuss
- 9. In binary number systems the sign of a number is indicated by _________.
Options- A. using a 0 (zero) bit in front of negative numbers
- B. inverting the bits if the number is negative
- C. including a sign bit along with the magnitude bits
- D. placing a negative sign in front of the number Discuss
- 10. A(n) _____ transformer is usually used for audio or power applications.
Options- A. iron-core
- B. air-core
- C. ferrite-core
- D. All of the above Discuss
More questions
Correct Answer: 30 mA
Correct Answer: 90%
Correct Answer: 50 mA
Explanation:
By Ohm's law, V = IR. I = V/R Given, Four 90 ohm resisters in series. So, R = ( R1 + R2 + R3 + R4) = 4 x 90 = 360 ohms. Therefore, I = 18/360 = 0.05 A [or] 50 milli amps.
Correct Answer: buffer the voltage amplifiers from the low-resistance load
Correct Answer: is lowered as the load increases
Correct Answer: zero ohms resistance
Correct Answer: ADC
Correct Answer: integration
Correct Answer: including a sign bit along with the magnitude bits
Correct Answer: iron-core
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