Question: Thermal circuit breaker has____________?

• 1. delayed trip action
• 2. instantaneous trip action
• 3. both of the above
• 4. none of the above

Question: With which of the following, a circuit breaker must be equipped for remote operation ?

• 1. Inverse time trip
• 2. Time-delay trip
• 3. Shunt trip
• 4. None of the above

Question: The main function of a fuse is to_____________?

• 1. protect the line
• 2. open the circuit
• 3. protect the appliance
• 4. none of the above

Question: An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is_______________?

• 1. 10 volts
• 2. 5 volts
• 3. 5/ volts
• 4. 5/2 volts

Question: A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of______________?

• 1. 50KHz
• 2. 100KHz
• 3. 1000/17KHz
• 4. 1000/7.07KHz

Question: A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high______________?

• 1. CMMR
• 2. Bandwidth
• 3. Slew rate
• 4. Open-loop gain

Question: Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be______________?

• 1. Square wave
• 2. Triangular wave
• 3. Parabolic wave
• 4. Sine wave

Question: A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?

• 1. 2
• 2. 1
• 3. 1/2
• 4. 0

Question: Which of the following amplifier is used in a digital to analog converter?

• 1. Non inverter
• 2. Voltage follower
• 3. Summer
• 4. Difference amplifier

Question: When a step-input is given to an op-amp integrator, the output will be______________?

• 1. A ramp
• 2. A sinusoidal wave
• 3. A rectangular wave
• 4. A triangular wave with dc bias