# Multiple choice question for engineering

## Set 1

1. An RL network is one which consists of ____________

a) Resistor and capacitor in parallel

b) Resistor and capacitor in series

c) Resistor and inductor in parallel

d) Resistor and inductor in series

### View Answer

2. At DC, inductor acts as _____________

a) Open circuit

b) Short circuit

c) Resistor

d) Inductor

### View Answer

3. In an RL series circuit, when the switch is closed and the circuit is complete, what is the response?

a) Response does not vary with time

b) Decays with time

c) Increases with time

d) First increases, then decreases

### View Answer

4. If the switch is closes at t=0, what is the current in the circuit?

a) 0A

b) 10A

c) 20A

d) 30A

### View Answer

5. What is the voltage across the inductor at t=0?

a) 0V

b) 20V

c) 60V

d) 58V

### View Answer

6. What is the expression for current in the given circuit?

a) i=2(e^{-2t})A

b) i=2(1-e^{-2t})A

c) i=2(e^{2t})A

d) i=2(1+e^{-2t})A

### View Answer

^{-2t})A.

7. At steady state, inductor acts as ____________

a) Open circuit

b) Short circuit

c) Resistor

d) Capacitor

### View Answer

8. At steady state, the current in the inductor is?

a) Maximum

b) Minimum

c) Zero

d) Infinity

### View Answer

9. Initially, when the switch in a series RL circuit is closed, the inductor acts as?

a) Open circuit

b) Short circuit

c) Resistor

d) Capacitor

### View Answer

10. Initially, when the switch in a series RL circuit is closed, the current in the inductor is?

a) Maximum

b) Minimum

c) Zero

d) Infinity

### View Answer

## Set 2

1. Paper capacitor is a type of _________

a) Fixed capacitor

b) Variable capacitor

c) Either fixed or variable depending on its usage

d) Neither fixed nor variable

### View Answer

2. A capacitor using chemical reactions to store charge are _______

a) Paper capacitor

b) Ceramic capacitor

c) Polyester capacitor

d) Electrolyte capacitor

### View Answer

3. Which, among the following, is the odd one out?

a) Ceramic capacitor

b) Electrolyte capacitor

c) Tuning capacitor

d) Paper capacitor

### View Answer

4. In a variable capacitor, capacitance can be varied by ______

a) Turning the rotatable plates in or out

b) Sliding the rotatable plates

c) Changing the plates

d) Changing the material of plates

### View Answer

5. The simplest kind of capacitor is ________

a) Ceramic capacitor

b) Electrolyte capacitor

c) Tuning capacitor

d) Paper capacitor

### View Answer

6. Capacitor preferred when there is high frequency in the circuits is _______

a) Electrolyte capacitor

b) Mica capacitor

c) Air capacitor

d) Glass capacitor

### View Answer

7. The type of capacitors used in communication transmitters are?

a) Electrolyte capacitor

b) Variable capacitor

c) Air capacitor

d) Glass capacitor

### View Answer

8. Which capacitors relatively costly?

a) Electrolyte capacitor

b) Mica capacitor

c) Air capacitor

d) Glass capacitor

### View Answer

9. ____________ capacitors usually have a colour code to find its value.

a) Electrolyte capacitor

b) Variable capacitor

c) Polyester capacitor

d) Glass capacitor

### View Answer

10. ______________ capacitors have a high leakage voltage.

a) Electrolyte capacitor

b) Variable capacitor

c) Air capacitor

d) Polyester capacitor

### View Answer

## Set 3

1. Among the following, which is the right formula for inductance?

a) L=emf*t/I

b) L=emf/t*I

c) L=emf*I/t

d) L=emf*t*I

### View Answer

2. Among the following, which is the right formula for inductance?

a) L=NΦ/t

b) L=NΦt

c) L=N/Φt

d) L=NΦ^{2t}

### View Answer

3. The unit for inductance is ___________

a) Ohm

b) Henry

c) A/m

d) A/s

### View Answer

4. What happens to the inductance when the magnetic field strength decreases?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero

### View Answer

5. As the number of turns in the coil increases, what happens to the inductance of the coil?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero

### View Answer

6. What is the unit for inductive reactance?

a) Henry

b) Ohm

c) Farad

d) Volts

### View Answer

7. What happens to the inductance as the length of the magnetic circuit increases?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero

### View Answer

^{-7}*A*N

^{2}/l, hence as the length of the magnetic circuit l increases, the inductance decreases.

8. The types of inductors are ____________

a) Fixed and variable

b) Only fixed

c) Only variable

d) Neither fixed nor variable

### View Answer

9. What happens to the inductance as the area of cross section of the coil increases?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero

### View Answer

^{-7}*A*N

^{2}/l, hence as the area of cross section A increases, the inductance also increases.

10. When the coil is wrapped around a ferromagnetic core, why is it difficult to determine the inductance?

a) The variation of flux is no longer proportional to the variation of current

b) Current does not exist in the coil

c) Flux does not exist in the coil

d) The value of current is too large to measure

### View Answer

## Set 4

1. In a series RLC circuit, the phase difference between the voltage across the capacitor and the voltage across the resistor is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

2. In a series RLC circuit, the phase difference between the voltage across the inductor and the voltage across the resistor is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

3. In a series RLC circuit, the phase difference between the voltage across the capacitor and the voltage across the inductor is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

4. In a series RLC circuit, the phase difference between the voltage across the resistor and the current in the circuit is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

5. In a series RLC circuit, the phase difference between the voltage across the capacitor and the current in the circuit is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

6. In a series RLC circuit, the phase difference between the voltage across the inductor and the current in the circuit is?

a) 0 degrees

b) 90 degrees

c) 180 degrees

d) 360 degrees

### View Answer

7. The current in the inductor lags the voltage in a series RLC circuit ___________ resonant frequency.

a) Above

b) Below

c) Equal to

d) Depends on the circuit

### View Answer

8. The current in the capacitor leads the voltage in a series RLC circuit ___________ resonant frequency.

a) Above

b) Below

c) Equal to

d) Depends on the circuit

### View Answer

9. The current in the inductor ___________ the voltage in a series RLC circuit above the resonant frequency.

a) Leads

b) Lags

c) Equal to

d) Depends on the circuit

### View Answer

10. The current in the capacitor ___________ the voltage in a series RLC circuit below the resonant frequency.

a) Leads

b) Lags

c) Equal to

d) Depends on the circuit

### View Answer

## Set 5

1. The variation of a quantity such as voltage or current shown on a graph is known as ___________

a) Waveform

b) Peak value

b) Instantaneous value

d) Period

### View Answer

2. What is the duration of one cycle known as _________

a) Waveform

b) Peak value

b) Instantaneous value

d) Period

### View Answer

3. The repetition of a variable quantity, recurring at equal intervals, is known as ___________

a) Waveform

b) Instantaneous value

c) Cycle

d) Period

### View Answer

4. The value of a given waveform at any instant time is termed as ___________

a) Waveform

b) Instantaneous value

c) Cycle

d) Period

### View Answer

5. The maximum instantaneous value measured from zero value is known as?

a) Peak value

b) Peak to peak value

c) Cycle

d) Period

### View Answer

6. The maximum variation between the maximum positive and the maximum negative value is known as?

a) Peak value

b) Peak to peak value

c) Cycle

d) Period

### View Answer

7. What is the correct reaction between peak value and peak to peak value for a sinusoidal waveform?

a) Vp=4Vp-p

b) Vp=Vp-p

c) Vp-p=2Vp

d) Vp=2Vp-p

### View Answer

8. If the peak to peak voltage is 10V, calculate the peak voltage.

a) 10V

b) 2V

c) 4V

d) 5V

### View Answer

9. If the peak voltage is 9V, calculate the peak to peak voltage.

a) 9V

b) 20V

c) 18V

d) 12V

### View Answer

10. The number of cycles that occur in one second is termed as ___________

a) Waveform

b) Frequency

b) Amplitude

d) Period