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Fundamentals of Electrical Circuits

Total questions: 70

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

The energy per unit charge is

a)

Voltage

b)

Power

c)

Current

d)

Work

2.

‘Positive Power’ meaning

a)

Power is being delivered to circuit

b)

Power is being extracted from circuit

c)

No power supply

d)

Input and output powers are equal

3.

The opposing capacity of materials against the current flow is

a)

Conductance

b)

Inductance

c)

Susceptance

d)

Resistance

4.

The current passing through a circuit is 7.2A and the power at the terminals is 27 watts.Existence is ___________ ohms.

a)

0.5402

b)

0.5208

c)

0.5972

d)

0.5792

5.

_____________ are the basic laws for analyzing a circuit.

a)

Newton's Law

b)

Einstein Theory

c)

Kirchhoff's Law

d)

Faradays Law

6.

Which of the following component is used to make and break a circuit?

a)

wire

b)

switch

c)

bulb

d)

All of the above

7.

A component which provides resistance is called

a)

circuit

b)

resistor

c)

cell

d)

fuse

8.

Which of the following is used to control electric current?

a)

insulator

b)

resistor

c)

conductor

d)

None of the above

9.

_______ used to measure electric current?

a)

cell

b)

battery

c)

ammeter

d)

galvanometer

10.

Which of the following refers to a parallel circuit?

a)

The current through each element are the same

b)

The voltage across each element is in proportion to it's resistance value

c)

The equivalent resistance is greater than any one of the resistor

d)

The current through any one element is less than the source current

11.

The SI unit of electric charge

a)

Coulomb (C)

b)

Joule (J)

c)

Ampere (A)

d)

Volt (V)

12.

The SI unit of Electric Potential

a)

Magnetomotive Force

b)

Ampere-Turns

c)

Joule

d)

Volt (V)

13.

One watt is equal to

a)

Joule/secod

b)

Newton -meter

c)

Newton/Coulomb

d)

Volt/meter

14.

The SI unit of electric current

a)

Coulomb (C)

b)

Ampere (A)

c)

Joule (J)

d)

Volt (V)

15.

The total current entering the closed surface is ... to the total current leaving the surface

a)

Equal

b)

Alike

c)

Greater

d)

Suited

16.

Kirchhoff's Voltage Law (KVL) states that...

a)

the algebraic sum of the potential differences in any loop must be equal to zero

b)

In a closed circuit, the amount of algebraic electromotive force (є) with a voltage drop (I.R) is zero.

c)

the algebraic sum of the potential differences in any loop must be equal to 1

d)

Supernode requires the application of KVL

17.

"The algebraic sum of all the voltages around any closed loop in a circuit is equal to zero" this can be mathematically written with...

a)

ΣV = 0

b)

ΣI = 0

c)

ΣI+ΣR = 0

d)

ΣR = 0

18.

 This is the symbol for a _____?

a)

switch

b)

battery

c)

light 

d)

wires

19.

This is the symbol for a _____?

a)

an AC current source

b)

an ammeter

c)

a DC current source

d)

a voltmeter

20.

This is the symbol for a _____?

a)

an AC current source

b)

an ammeter

c)

a DC current source

d)

a voltmeter

21.

This is the symbol for a _____?

a)

an AC current source

b)

a battery

c)

a DC current source

d)

a single cell

22.

An electric circuit operates in ___ type of connectivity configuration?

a)

Open

b)

Short

c)

Disconnected

d)

All the above

23.

Which of the following are the standard components of an electric circuit?

a)

Voltage and current source

b)

Passive components

c)

Connecting wires

d)

All the above

24.

A resistor has minimum of __ number of terminals?

a)

2

b)

3

c)

4

d)

5

25.

Circuit analysis in an electrical circuit can be performed using ___?

a)

Linear

b)

Non linear

c)

Both a and b

d)

None of the above

26.

In circuit the formula for Rx is defined mathematically:

a)

Rx = R1/(R1 + R2 + R3)

b)

Rx = R2.R3/(R1)

c)

Rx = R2.R3/(R1 + R2 + R3)

d)

Rx = R2.R3/(R2 + R3)

27.

Connection three phase wires A,B and C in which there is no neutral point is called

a)

Wye Connection

b)

Delta Connection

c)

Lambda Connection

d)

Z Connection

28.

Find the equivalent delta circuit.

a)

9.69 ohm, 35.71 ohm, 6.59 ohm

b)

10.69 ohm, 35.71 ohm, 6.59 ohm

c)

9.69 ohm, 34.71 ohm, 6.59 ohm

d)

10.69 ohm, 35.71 ohm, 7.59 ohm

29.

Which, among the following is the correct expression for star-delta conversion?

a)

R1=Ra*Rb/(Ra+Rb+Rc), R2=Rb*Rc/(Ra+Rb+Rc), R3=Rc*Ra/(Ra+Rb+Rc)b)

b)

R1=Ra/(Ra+Rb+Rc), R2=Rb/(Ra+Rb+Rc), Rc=/(Ra+Rb+Rc)

c)

R1=Ra+Rb+Ra*Rb/Rc, R2=Rc+Rb+Rc*Rb/Ra, R3=Ra+Rc+Ra*Rc/Rb

d)

R1=Ra*Rb/Rc, R2=Rc*Rb/Ra, R3=Ra*Rc/Rb

30.

Find the equivalent resistance between X and Y.

a)

3.33 ohm

b)

4.34 ohm

c)

5.65 ohm

d)

2.38 ohm

31.

Delta connection is also known as____________

a)

Y-connection

b)

Mesh connection

c)

Either Y-connection or mesh connection

d)

Neither Y-connection nor mesh connection

32.

Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between B and C?

a)

Rc+Rb+Rc*Rb/Ra

b)

Rc+Rb+Ra*Rb/Rc

c)

Ra+Rb+Ra*Rc/Rb

d)

Rc+Rb+Rc*Ra/Rb

33.

Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between A and C?

a)

Ra+Rb+Ra*Rb/Rc

b)

Ra+Rc+Ra*Rc/Rb

c)

Ra+Rb+Ra*Rc/Ra

d)

Ra+Rc+Ra*Rb/Rc

34.

Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between A and B?

a)

Rc+Rb+Ra*Rb/Rc

b)

Ra+Rb+Ra*Rc/Rb

c)

Ra+Rb+Ra*Rb/Rc

d)

Ra+Rc+Ra*Rc/Rb

35.

If a 1ohm 2ohm and 32/3ohm resistor is connected in star, find the equivalent delta connection.

a)

34 ohm, 18.67 ohm, 3.19 ohm

b)

33 ohm, 18.67 ohm, 3.19 ohm

c)

33 ohm, 19.67 ohm, 3.19 ohm

d)

34 ohm, 19.67 ohm, 3.19 ohm

36.

If an 8/9ohm, 4/3ohm and 2/3ohm resistor is connected in star, find its delta equivalent.

a)

4ohm, 3ohm, 2ohm

b)

1ohm, 3ohm, 2ohm

c)

4ohm, 1ohm, 2ohm

d)

4ohm, 3ohm, 1ohm

37.

Find the equivalent resistance between A and B.

a)

32ohm

b)

31ohm

c)

30ohm

d)

29ohm

38.

The most commonly used connections for power systems as a step-up and step-down transformers are

a)

Star-delta, star-star

b)

Delta-star, star-delta

c)

Star-star, delta-delta

d)

Star-delta, delta-star

39.

Find the equivalent resistance at node A in the delta connected circuit shown in the figure below.

a)

1

b)

2

c)

3

d)

4

40.

Find the equivalent resistance between node 1 and node 2 in the star connected circuit shown below.

a)

2

b)

29

c)

30

d)

31

41.

Which of the following is a Kirchhoff’s first law?

a)

KCL

b)

KVL

c)

Current Law

d)

Both A and C

42.

Which of the following is Kirchhoff’s second law?

a)

KCL

b)

KVL

c)

Current Law

d)

Both A and C

43.

Which of the following Kirchhoff’s law defines addition of multiple voltages in a loop is 0?

a)

KCL

b)

KVL

c)

Voltage Law

d)

Both B and C

44.

Which of the following Kirchhoff’s law defines incoming and outgoing sum of currents towards node are equal?

a)

KCL

b)

KVL

c)

Voltage Law

d)

Both B and C

45.

Which of the formula defines KCL where i1, i2 are incoming currents and i3,i4 are outgoing currents from a node in a circuit?

a)

i1+i2=i3+i4

b)

i1+i3=i2+i4

c)

i1-i2=i3-i4

d)

i4-i1=i2+i3

46.

Which of the following electric parameters do Kirchhoff law calculate?

a)

Voltage

b)

Resistance

c)

Current

d)

Both A and C

47.

Which of the following law calculates resistance of electric circuit?

a)

Ohms law

b)

KCL

c)

KVL

d)

Both B and C

48.

A circuit is a ____ loop?

a)

Short circuited

b)

Closed

c)

Opened

d)

Both A and B

49.

Which of the following term in DC circuit theory connects elements?

a)

Path

b)

Node

c)

Branch

d)

Loop

50.

Which of the following term in DC circuit theory connects number of electrical elements?

a)

Path

b)

Node

c)

Branch

d)

Loop

51.

Which of the following term in DC circuit theory connects between nodes?

a)

Path

b)

Mesh

c)

Branch

d)

Loop

52.

Which of the following term in DC circuit theory is a closed type path?

a)

Path

b)

Mesh

c)

Branch

d)

Loop

53.

Which of the following term in DC circuit theory does not have closed type path?

a)

Path

b)

Mesh

c)

Branch

d)

Loop

54.

Which of the following is the application of Kirchhoff’s law?

a)

Determine current in circuit

b)

Determine potential drop

c)

Determine current direction

d)

All the above

55.

Which of the following law is used for analyzing a circuit?

a)

Ohms law

b)

Faradays law

c)

Newtons law

d)

Kirchhoff’s law

56.

The value of current in a parallel configured circuit is _______?

a)

High

b)

Low

c)

Zero

d)

Infinity

57.

Which of the following satisfies KCL?

a)

Zero charge accumulation at node

b)

Possibility of charge accumulation at node

c)

A node may store energy

d)

None of the above

58.

KVL principle converts ___ parameter?

a)

Energy

b)

Mass

c)

Charge

d)

Momentum

59.

KVL is performed using___?

a)

Nodal analysis

b)

Mesh analysis

c)

Both a and b

d)

Voltage analysis

60.

Which of the following are the disadvantages experienced by Kirchhoff’s law?

a)

Incorrect high frequency value of AC is obtained

b)

Neglects other components electric field

c)

Ignores current flow through capacitors

d)

All the above

61.

Mesh analysis employs the method of ___________

a)

KVL

b)

KCL

c)

Both KVL and KCL

d)

Neither KVL and KCL

62.

Mesh analysis is generally used to determine _________

a)

Voltage

b)

Current

c)

Resistance

d)

Power

63.

Mesh analysis can be used for __________

a)

Planar circuits

b)

Non-planar circuits

c)

Both planar and non-planar circuits

d)

Neither planar nor non-planar circuits

64.

Nodal analysis is generally used to determine_______

a)

Voltage

b)

Current

c)

Resistance

d)

Power

65.

If there are 10 nodes in a circuit, how many equations do we get?

a)

10

b)

9

c)

8

d)

7

66.

Nodal analysis can be applied for________

a)

Planar networks

b)

Non-planar networks

c)

Both planar and non-planar networks

d)

Neither planar nor non-planar networks

67.

How many nodes are taken as reference nodes in a nodal analysis?

a)

1

b)

2

c)

3

d)

4

68.

If there are N nodes in a circuit, then the number of nodal equations that can be formed are?

a)

N+1

b)

N

c)

N-1

d)

N-2

69.

If there are M branch currents, then we can write ___________ number of independent equations.

a)

M-2

b)

M-1

c)

M

d)

M+1

70.

If there are M meshes, B branches and N nodes including reference node, the number of mesh currents is given as M=?

a)

B + (N+1)

b)

B + (N-1)

c)

B-(N+1)

d)

B-(N-1)

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