What pin attributes you would set to drive an LED on/off? digital output O analog output O digital input analog input

9)This multiple choice question from MEASUREMENTS INSTRUMENTATIONS course.

Answer both or else skip the question

Which of the following can be used as an output device? [Select all that are correct] Temperature sensor LED bar graph DC Motor LCD Dispay Phototransistor Speaker DIP switches

6. Draw a comparator circuit to turn on an LED when the input voltage exceed 5 volts.

choose the correct answer.  1. Transistor can be used as a switch a) True b)False   2. Diode can be used as a switch a) True b) False   3. Transistor conducts maximum output voltage during operation in a) Active region b) Saturation region c) Cutoff region d) None   4. Transistor conducts maximum output current during operation in a) Active region b) Saturation region c) Cutoff region d) None   5. Zener diode can not work in forward biased region a) True b) False   6. Transistor can not be used as a switch a) True b) False   7. BJT is a a) Current controlled device b) Voltage controlled device c) Beta controlled device d) Temperature controlled device   8. Diode is a a) Unidirectional device b) Bidirectional device c) both of the above d) None…

10 D1 R1 5V 1K Determine the current flowing through the LED. (assume an LED forward voltage of 2.1 volts)

Indicate which of the following statements refer to LCD displays and which refer to LED displays:   a. Emit light   b. Reflect ambient light   c. Are best for low-power applications   d. Require an AC voltage   e. Use a 7-segment arrangement to produce digits   f. Require current-limiting resistors

A digital wave is received. It says the value for low is 5 V. The system registers it as low from 8V. This system switches On as of 12 V and registers High at 15 V. What is the unacceptable range of the system?

dont use ai and please explainQ1 a) If a 16MHz crystal drives the standard 8051, what is the period of one clock pulse?       b) Calculate the period (duration) to execute the instruction "MUL AB."