# Multiple choice question for engineering

## Set 1

1. Shape of the resonance curve depends upon the?

a) Q-factor

b) Voltage

c) Current

d) Either voltage or current

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2. A circuit is said to be selective if it has a _____ peak and ____ bandwidth.

a) Blunt, narrow

b) Sharp, narrow

c) Sharp, broad

d) Blunt, broad

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3. What is the Q factor of a selective circuit?

a) Vey low

b) Very high

c) Zero

d) Infinity

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4. In selective circuits, higher the Q factor _________ the peak.

a) Sharper

b) Blunter

c) Neither sharper nor blunter

d) Either sharper or blunter

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5. Q is a measure of _________

a) Resonance

b) Bandwidth

c) Selectivity

d) Either resonance or bandwidth

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6. In selective circuits, the resonant frequency lies in the ________ of the bandwidth frequency range.

a) Beginning

b) End

c) Midpoint

d) Cannot be determined

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7. In order for high selectivity, the resistance must be?

a) Small

b) Large

c) Negative

d) Positive

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8. What is the frequency in resonance condition?

a) Minimum

b) Maximum

c) Cannot be determined

d) Zero

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9. If the resonant frequency in a series RLC circuit is 50kHz along with a bandwidth of 1kHz, find the quality factor.

a) 5

b) 50

c) 100

d) 500

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10. What happens to the quality factor when the bandwidth increases?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero

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## Set 2

1. Find the current in the circuit.

a) 10 A

b) 20 A

c) 30 A

d) 40 A

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2. In a series circuit, which of the parameters remain constant across all circuit elements such as resistor, capacitor and inductor etcetera?

a) Voltage

b) Current

c) Both voltage and current

d) Neither voltage nor current

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3. Voltage across the 60ohm resistor is______

a) 72V

b) 0V

c) 48V

d) 120V

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4. Find the voltage across the 6 ohm resistor.

a) 150V

b) 181,6V

c) 27.24V

d) 54.48V

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5. If there are two bulbs connected in series and one blows out, what happens to the other bulb?

a) The other bulb continues to glow with the same brightness

b) The other bulb stops glowing

c) The other bulb glows with increased brightness

d) The other bulb also burns out

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6. What is the value of x if the current in the circuit is 5A?

a) 75 ohm

b) 65 ohm

c) 55 ohm

d) 45 ohm

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7. Voltage across a series resistor circuit is proportional to?

a) The amount of time the circuit was on for

b) The value of the resistance itself

c) The value of the other resistances in the circuit

d) The power in the circuit

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8. Many resistors connected in series will?

a) Divide the voltage proportionally among all the resistors

b) Divide the current proportionally

c) Increase the source voltage in proportion to the values of the resistors

d) Reduce the power to zero

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9. What is the voltage measured across a series short?

a) Infinite

b) Zero

c) The value of the source voltage

d) Null

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10. What happens to the current in the series circuit if the resistance is doubled?

a) It becomes half its original value

b) It becomes double its original value

c) It becomes zero

d) It becomes infinity

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## Set 3

1. It is preferable to connect bulbs in series or in parallel?

a) Series

b) Parallel

c) Both series and parallel

d) Neither series nor parallel

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2. Calculate the total resistance between the points A and B.

a) 7 ohm

b) 0 ohm

c) 7.67 ohm

d) 0.48 ohm

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3. Calculate the equivalent resistance between A and B.

a) 60 ohm

b) 15 ohm

c) 12 ohm

d) 48 ohm

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4. Calculate the resistance between A and B.

a) 3.56 ohm

b) 7 ohm

c) 14.26 ohm

d) 29.69 ohm

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5. Batteries are generally connected in______

a) Series

b) Parallel

c) Either series or parallel

d) Neither series nor parallel

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6. In a _________ circuit, the total resistance is greater than the largest resistance in the circuit.

a) Series

b) Parallel

c) Either series or parallel

d) Neither series nor parallel

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7. In a ____________ circuit, the total resistance is smaller than th smallest resistance in the circuit.

a) Series

b) Parallel

c) Either series or parallel

d) Neither series nor parallel

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8. Which is the most cost efficient connection?

a) Series

b) Parallel

c) Either series or parallel

d) Neither series nor parallel

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9. Calculate the equivalent resistance between A and B.

a) 2 ohm

b) 4 ohm

c) 6 ohm

d) 8 ohm

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10. Calculate the equivalent resistance between A and B.

a) 6.67 ohm

b) 46.67 ohm

c) 26.67 ohm

d) 10.67 ohm

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## Set 4

1. From the given circuit, find the value of IR.

a) 0

b) V/I

c) V/R

d) Cannot be determined

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2. What is the relation between IR and V in the following circuit?

a) IR leads V

b) IR lags V

c) IR and V are in phase

d) No relation

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3. What is the expression for the current in the inductor from the following circuit?

a) V/I

b) V/XL

c) 0

d) Cannot be determined

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4. What is the phase relation between IL and V from the following circuit?

a) IL lags V

b) IL leads V

c) IL and V are in phase

d) No relation

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5. Find the expression for the current I from the given circuit.

a) I=IL

b) I=IR

c) I=IL+IR

d) I=0

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6. Find the total current if IL=2A and Ir=5A.

a) 3A

b) -3A

c) 7A

d) 10A

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7. Find the value of IR if I=10A and IL=8A.

a) 5A

b) 18A

c) 12A

d) 2A

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8. Find the value of IL if I=10A and IR=6A.

a) 4A

b) 18A

c) 12A

d) 2A

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9. What is the expression for the current in the capacitor in the following circuit?

a) V/C

b) V/I

c) 0

d) V/XC

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10. What is the phase relation between IC and V from the following circuit?

a) IC lags V

b) IC leads V

c) IC and V are in phase

d) No relation

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## Set 5

1. A voltage source connected in series with a resistor can be converted to a?

a) Current source in series with a resistor

b) Current source in parallel with a resistor

c) Voltage source in parallel with a resistor

d) Cannot be modified

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2. Calculate the total current in the circuit.

a) 2.3mA

b) 4.3mA

c) 3.3mA

d) 1.3mA

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3. Find the value of voltage once source transformation is applied to the circuit.

a) 10V

b) 30V

c) 50V

d) 70V

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4. Once the circuit is transformed to a voltage source where will the resistance be connected?

a) In series with the voltage source

b) In parallel with the voltage source

c) The resistance is removed from the circuit

d) Resistance is multiplies by 10 and connected in series with the source

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5. What will the value of the current be once source transformation is applied to the circuit?

a) 10A

b) 20A

c) 30A

d) 40A

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6. Once the circuit is transformed to a current source where will the resistance be connected?

a) In series with the voltage source

b) In parallel with the voltage source

c) The resistance is removed from the circuit

d) Resistance is multiplies by 10 and connected in series with the source

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7. A current source connected in parallel with a resistor can be converted to a?

a) Current source in series with a resistor

b) Voltage source in series with a resistor

c) Voltage source in parallel with a resistor

d) Cannot be modified

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8. A source transformation is_________

a) Unilateral

b) Bilateral

c) Unique

d) Cannot be determined

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9. In source transformation________

a) Voltage source remain the same

b) Current sources remain the same

c) Both voltage and current source remain the same

d) Resistances remain the same

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10. If there are 3 10V sources connected in parallel then on source transformation__________

a) The effect of all the sources is considered

b) The effect of only one source is considered

c) The effect of none of the sources is considered

d) The effect of only 2 sources is considered.