ELEX

Determine the voltage gain, with feedback for voltage-series feedback having A=-100, Ri=10kΩ, and Ro=20kΩ for feedback of β=-0.155

• -9.09

• -8.08

• -7.07

• -6.06

Determine the frequency of oscillation of the circuit below:

• 4.46 kHz

• 5.46 kHz

• 6.46 kHz

• 7.46 khz

Calculate the output voltage if V1 = 300 mV and V2 = 700 mV.

• 0V

• -12V

• 12V

• -4V

This circuit is an example of a(n)

• Dc voltmeter

• Display driver

• Instrumentation amplifer

• None of the above

The circuit shown below is functionally equivalent to

• NOR gate

• OR gate

• EX-OR gate

• NAND gate

Identify the symbol for an DIAC

• A

• B

• C

• D

If the input voltage is 1.5 V, determine the power dissipated by the 1 kilo-ohm resistance

• 1.44 mW

• 2.44 mW

• 3.44 mW

• 4.44 mW

Determine the frequency of oscillation of the circuit below

• 6.5 kHz

• 15.9 kHz

• 1.59 kHz

• 65 kHz

An SCR is triggered at 80º in the positive half cycle, only. The rms anode current is 50 A. If the firing angle is changed to 160º, the rms current is likely to be

• 25 A

• 50 A

• Less than 25 A

• Less than 50 A

Calculate the approximate frequency of oscillation

• 200 Hz

• 218.3 Hz

• 100 kHz

• 109.1 kHz