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Q1. | Efficiency of power transfer when maximum transfer of power occurs is |

A. | 100% [Wrong Answer] |

B. | 80% [Wrong Answer] |

C. | 75% [Wrong Answer] |

D. | 50% [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ Pole of a network is a frequency at which

network function becomes zero.

network function becomes infinite.

network function becomes unity.

none of these.

⇒ When the power transferred to the load is maximum, the efficiency of power transfer is

25%.

75%.

50%.

100%.

⇒ A delta circuit has each element of value R/2. The equivalent elements of star circuit with be

R/6

R/3

2R

3R

⇒ Ideal current source have

zero internal resistance.

infinite internal resistance.

low value of voltage.

large value of current.

⇒ Thevenin resistance R

_{th}is found

by removing voltage sources along with their internal resistances

by short-circuiting the given two terminals

between any two 'open' terminals

between same open terminals as for E

_{th}

⇒ A dependent source

may be a current source or a voltage source

is always a voltage source

is always a current source

neither a current source nor a voltage source

⇒ A human nerve cell has an open-circuit voltage of 80 mV and it can deliver a current of 5 nA through a 6 M ohm load. What is the maximum power available from the cell?

0.16 nW

16 mW

1.6 W

16 pW

⇒ Maxwell' s loop current method of solving electrical networks

uses branch currents.

utilizes Kirchhoff' s voltage law.

is confined to single-loop circuits

is a network reduction method.

⇒ A closed path made by several branches of the network is known as

branch

loop

circuit

junction

⇒ The terminals across the source are____ if a current source is to be neglected.

open circuited

short circuited

replaced by a capacitor

replaced by a source resistance

⇒ A pole of driving point admittance function implies

zero current for a finite value of driving voltage.

zero voltage for a finite value of driving current.

an open circuit condition.

none of(a), (b) and (c) mentioned in the question.

⇒ Kirchhoff's voltage law is concerned with

IR drop.

battery emf.

junction voltage.

both (a) and (b).

⇒ Which of the following is linear and bilateral parameter ?

resistors

semi-conductor diodes

electron tubes

transistor

⇒ The superposition theorem is applicable to

linear, non-linear and time variant responses

linear and non-linear resistors only

linear responses only

none of the above

⇒ Kirchhoff's s law is applicable to

passive networks only

a.c. circuits only

d.c. circuits only

both ac. as well d.c. circuits

⇒ For a two-port symmetrical bilateral network, if A = 3 and B = 1 ω, the value of parameter C will be

4 s

6 s

8 s

16 s

⇒ In a delta network each element has value R. The value of each element in equivalent star network will be

R/6

R/4

R/2

R/3

⇒ Constant voltage source is

active and bilateral.

passive and bilateral

active and unilateral.

passive and unilateral.

⇒ An electric circuit with 10 branches and 7 nodes will have

3 loop equations.

4 loop equations

7 loop equations

10 loop equations.

⇒ A passive 2-port network is in a steady-state. Compared to its input, the steady state output can never offer

higher voltage

lower impedance

greater power

better regulation

⇒ A star circuit has element of resistance R/2. The equivalent delta elements will be

R/6

3/2R

2R

4R

⇒ A linear resistor having 0 < R < ∞ is a

current controlled resistor

voltage controlled resistor

both current controlled and voltage controlled resistor

none of the above

⇒ A practical current source is represented by

a resistance in series with an ideal current source.

a resistance in parallel with an ideal current source.

a resistance in parallel with an ideal voltage source.

none of the above.

⇒ While determining R

_{TH}of a circuit

voltage and current sources should be left as they are.

all sources should be replaced by their source resistances.

all independent current and voltage sources are shortcircuited

none of the above

⇒ Nodal analysis is based on

KCL.

KVL.

both.

law of conservation of energy.

⇒ According to Kirchhoff's voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always

negative

positive

determined by battery e.m.fs.

zero

⇒ What is the number of chords of a connected graph G of n vertices and e edges?

n(n - 1)/2

n - 1

e - n - 1

e - n + 1

⇒ Which of the following is the passive element?

Capacitance

Ideal current source

Ideal voltage source

All of the above

⇒ To determine the polarity ofthe voltage drop across a resistor, it is necessary to know

value of current through the resistor

direction of current through the resistor

value of resistor

e.m.fs. in the circuit

⇒ In a balanced Wheatstone bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This inference can be drawn from

reciprocity theorem.

duality theorem.

compensation theorem.

equivalence theorem.