E/M 2025 1st year preparatory exam paper

1.      Abbreviation of  DSO  __________

• a)      Digital storage oscilloscope

• b)      Dual scope oscillator

• c) Digital store oscillator

• d)      None

      2. How ammeter is connected for the measurement of current in an electrical circuit?

• a)      Across load

• b)      Across source

• c)      Parallel

• d)      Series

3.     What is the input stage of OP – Amp?

• a)      CE amplifier

• b)      CC amplifier

• c)      Class B amplifier

• d)      Differential amplifier

4. 4.   Which IC is used for the implementation of 1:16 de multiplexer ?

• 4. a)      IC 74154

• 4. b)      IC 74138

• 4. c)      IC 74139

• 4. d)      IC 74155

5. 5.       What is the advantage of MOSFET?

• 5. a)      High input impedance

• 5. b)      Low input impedance

• 5. c)      Moderate input impedance

• 5. d)      None

6. 6.       Which parameter is measured by a multi meter?

• 6. a)      Energy

• 6. b)      Voltage

• 6. c)      Time duration

• 6. d)      Frequency

7.      Which component opposes any change in current?

• a)      Inductor

• b)      Resistor

• c)      Capacitor

• d)      Diode

8.    What are the uses of simulation software?

• a)      Solder and de-solder components

• b)      Design a circuit

• c)      Replace defective components

• d)      design and test a circuit

9. 9.       What is the current rating of voltage regulator IC LM 338K?

• 9. a)      2A

• 9. b)      4A

• 9. c)      5A

• d)      3A

10.       Which type of circuit is used in the oscillator?

• a)      Crystal circuit

• b)      Hartley oscillator

• c)      Shunt fed colpitt’s oscillator

• d)      None