NETWORK THEOREMS

For the same original network end load, Thevenin's and Norton's equivalent circuits are related by A. Eth = InZth = InZn B. Eth = InZn = IthZth C. Zn = Eth/Ith D. Zth = En/In

A. Eth = InZth = InZn

Which of the following statement is not correct? A. Ideal voltage source is one whose internal conductance is zero. B. Ideal current source is one whose internal conductance is zero. C. Ideal voltage source is one whose internal resistance is zero. D. Ideal voltage source is one whose generated voltage is equal to the available terminal voltage.

A. Ideal voltage source is one whose internal conductance is zero.

Regarding Norton's equivalent which of the following is not correct? A. Norton's equivalent is the voltage equivalent of the network B. Norton's equivalent is the current equivalent of the network. C. Norton's equivalent resistance is the same as the Thevenin equivalent resistance. D. The load is connected in parallel to the Norton equivalent resistance and Norton's equivalent source.

A. Norton's equivalent is the voltage equivalent of the network

The relationship between voltage and current is same for two opposite directions of current in case of A. bilateral network B. active network C. unilateral network D. passive network

A. bilateral network

Which of the following is an active element of a circuit? A. ideal current source B. resistance C. inductance D. capacitance

A. ideal current source

Open circuit voltage is the potential difference between two points when the impedance between these points is A. infinity B. reactive C. zero D. capacitive

A. infinity

In compensation theorem a network containing generator can be replaced by A. its zero internal impedance B. its infinite impedance C. another generator D. L.C. circuit

A. its zero internal impedance

The superposition theorem is applicable to A. linear responses only B. linear and non-linear responses only C. linear, non-linear and time variant responses D. non-linear responses only

A. linear responses only

A closed path made of several branches of the network is known as A. loop B. junction C. branch D. division

A. loop

For open circuited condition of Thevenin's theorem, all sources of emf in the network are replaced by A. their internal impedance B. their internal resistance C. as a total a big source of emf D. their internal reactance

A. their internal impedance

Kirchhoff's voltage law is not valid for a non linear network A. True B. False C. Partly true D. Partly false

B. False

A source V has an internal impedance Zin = (R + jX) when it is connected ZL = R - jX the power transferred is A. V^2/4R^2 B. V^2/4R C. V^2/R D. V^2/2R

B. V^2/4R

Which of the following statement is not correct? A. voltage source is an active element B. current source is a passive element C. resistance is a passive element D. conductance is a passive element

B. current source is a passive element

The current in any branch of a network in case of Thevenin's theorem is the same as if it were connected to a generator of A. different rating B. emf E1 and internal impedance Z1 C. low rating D. emf E1 and internal impedance zero

B. emf E1 and internal impedance Z1

An ideal voltage source is that which A. has terminal voltage in proportion to current B. has zero internal resistance C. has terminal voltage in proportion to load D. has terminal voltage in proportion to power

B. has zero internal resistance

For maximum power transfer, according to maximum power transfer theorem, source impedance A. must be very much large as compared to the load impedance B. must be complex conjugate of load impedance C. must be equal to load impedance D. must be very small as compared to the load impedance

B. must be complex conjugate of load impedance

Reciprocity theorem is valid for A. active network only B. passive network only C. active and passive network both D. none of the above

B. passive network only

In case of delta connected circuit, when one resistor is open, power will be A. unaltered B. reduced by 1/3 C. reduced to 1/9 D. reduced to 1/16

B. reduced by 1/3

The most important feature of superposition theorem application is A. that the process is eased very much B. to find d.c. level in a network that has both sources C. that number of equations needed to be solved is reduced very much D. none of the above

B. to find d.c. level in a network that has both sources

Kirchhoff's law is applicable to A. AC circuits only B. passive networks only C. AC as well as DC circuits D. DC circuits only

C. AC as well as DC circuits

If an electrical network having one or more than one voltage source, is transformed into equivalent electrical network with a single voltage source (which is short circuit current of previous circuit) with parallel internal resistance of the network with all current source replaced by their internal resistance. The above illustration is called A. Thevenin's theorem B. Reciprocity theorem C. Norton's theorem D. Superposition theorem

C. Norton's theorem

Regarding Thevenin's equivalent, which of the following is not correct? A. The voltage source in the Thevenin equivalent circuit is the open circuit voltage of the network when load is disconnected. B. The Thevenin equivalent resistance (impedance) is the resistance (impedance) of the network when all voltage sources are short circuited. C. Thevenin equivalent resistance is calculated when all voltafe sources are open circuited. D. Thevenin equivalent is the voltage equivalent of the network.

C. Thevenin equivalent resistance is calculated when all voltafe sources are open circuited.

Norton's theorem reduces a two terminal network to A. a constant voltage source and an impedance in parallel B. a constant voltage source and an impedance in series C. a constant current source and an impedance in parallel D. a constant current source and an impedance in series

C. a constant current source and an impedance in parallel

Thevenin's theorem is applicable to network of A. ac circuit only B. dc circuit only C. ac and dc circuit both D. none of the above

C. ac and dc circuit both

In order to find Z in Thevenin's theorem A. all independent voltage and current sources are short circuited B. all independent voltage sources are short circuited and independent current sources are open circuited C. all independent current sources are short circuited and independent voltage sources are open circuited D. all independent voltage sources are open circuited and independent current sources are open circuited

C. all independent current sources are short circuited and independent voltage sources are open circuited

A network is said to be non linear if it does not satisy A. homogeneity condition B. superposition condition C. both A and B D. associative condition

C. both A and B

Which of the following is not a non-linear element? A. diode B. transistor C. heater coil D. electric arc with unlike electrodes

C. heater coil

An ideal current source has zero A. voltage on no load B. internal resistance C. internal conductance D. current

C. internal conductance

A passive network has A. no source of emf B. no source of current C. neither source of current nor source of emf D. none of these

C. neither source of current nor source of emf

The superposition theorem requires as many circuits to be solved as there are A. meshes B. nodes C. sources D. all of the above

C. sources

Which of the following theorems enables a number of voltage (or current) source to be combined directly into a single voltage (or current) source? A. compensation theorem B. reciprocity theorem C. superposition theorem D. Millman's theorem

D. Millman's theorem

For reciprocity theorem to be applicable to a network in which A. generators are present B. capacitor is present C. inductor is present D. generators are not present

D. generators are not present