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Single Phase Series Circuits Online Exam Quiz

Important questions about Single Phase Series Circuits. Single Phase Series Circuits MCQ questions with answers. Single Phase Series Circuits exam questions and answers for students and interviews.

What is the correct expression for the phase angle in an RLC series circuit?

Options

A : a. a

B : b. b

C : c. c

D : d. d

Which type of ac waveform is given in figure?

Options

A : a. sinusoidal

B : b. triangular

C : c. square

D : d. complex waveform

Instantaneous voltage is the product of resistance and _____________ current in a resistive circuit.

Options

A : a. Instantaneous

B : b. Average

C : c. RMS

D : d. Peak

Find the value of the instantaneous voltage if the resistance is 2 ohm and the instantaneous current in the circuit is 5A.

Options

A : a. 5V

B : b. 2V

C : c. 10V

D : d. 2.5V

The power for a purely resistive circuit is zero when?

Options

A : a. Current is zero

B : b. Voltage is zero

C : c. Both current and voltage are zero

D : d. Either current or voltage is zero

The correct expression for the instantaneous current if instantaneous voltage is Vm(sint) in a resistive circuit is?

Options

A : a. 1A

B : b. 2A

C : c. 3A

D : d. 4A

Calculate the resistance in the circuit if the rms voltage is 20V and the rms current is 2A.

Options

A : a. 2 ohm

B : b. 5 ohm

C : c. 10 ohm

D : d. 20 ohm

The correct expression for the instantaneous current in a resistive circuit is?

Options

A : a. i=Vm(sint)/R

B : b. i=Vm(cost)/R

C : c. i=V(sint)/R

D : d. i=V(cost)/R

Can ohm’s law be applied in an ac circuit?

Options

A : a. Yes

B : b. No

C : c. Depends on the rms current

D : d. Depends on the rms voltage

The correct expression for the instantaneous current if instantaneous voltage is Vm(sint) in an inductive circuit is?

Options

A : a. i = Vm(sint)/X?

B : b. i = Vm(cost)/X?

C : c. i = -Vm(sint)/X?

D : d. i = -Vm(cost)/X?

Inductor does not allow sudden changes in?

Options

A : a. Voltage

B : b. Current

C : c. Resistance

D : d. Inductance

Inductance is _____________________ to number of turns in the coil.

Options

A : a. directly proportional

B : b. inversely proportional

C : c. equal

D : d. not related

Choke involve use of _____________

Options

A : a. Resistor

B : b. Capacitor

C : c. Inductor

D : d. Transistor

What is the value of current in an inductive circuit when there is no applied voltage?

Options

A : a. Minimum

B : b. Maximum

C : c. Zero

D : d. Cannot be determined

What is the current in an inductive circuit when the applied voltage is maximum?

Options

A : a. Infinity

B : b. Maximum

C : c. Zero

D : d. Cannot be determined

In an inductive circuit, the voltage_______ the current?

Options

A : a. Leads

B : b. Lags

C : c. Is greater than

D : d. Is less than

In an inductive circuit, the current________ the voltage?

Options

A : a. Leads

B : b. Lags

C : c. Is greater than

D : d. Is less than

In which device inductor cannot be used?

Options

A : a. filter circuit

B : b. transformer

C : c. choke

D : d. dielectric

A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the current in the circuit.

Options

A : a. 2.2A

B : b. 4.2A

C : c. 6.2A

D : d. 8.2A

Which, among the following, is the correct expression for ?.

Options

A : a. ?=tan¯¹ (XL/R)

B : b. ?=tan¯¹ (R/XL)

C : c. ?=tan¯¹ (XL*R)

D : d. ?=cos¯¹ (XL/R)

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