MCQOPTIONS
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MCQOPTIONS
This section includes 439 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
If R1 is the resistance of a conductor at T1 and R0 at T0 and the coefficient of resistance at T0 is α0, the relation between these quantities is: |
| A. | R1 = R0 + α0 (T1 + T0)R0 |
| B. | R0 = R1 + α0 (T1 - T0)R1 |
| C. | R1 = R0 + α0 (T1 - T0) |
| D. | R1 = R0 + α0 (T1 - T0)R0 |
| Answer» E. | |
| 102. |
Assertion (A): The inductor behaves as a short circuit at s = 0 and as an open circuit at s = ∞Reason (R): The driving point impedance of an inductor has a zero at s = 0 and a pole at s = ∞ |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| B. | Both (A) and (R) are true, but (R) is not the correct explanation of (A) |
| C. | (A) is true, but (R) is false |
| D. | (A) false, but (R) is true |
| Answer» B. Both (A) and (R) are true, but (R) is not the correct explanation of (A) | |
| 103. |
Colour bands for 1.5 ohms resistor will be |
| A. | Brown, Green, Brown |
| B. | Brown, Green, Golden |
| C. | Brown, Golden, Green |
| D. | Brown, Golden, Golden |
| Answer» C. Brown, Golden, Green | |
| 104. |
Find the voltage across 10 Ω resistor in the given circuit: |
| A. | 50 V |
| B. | 10 V |
| C. | 5 V |
| D. | 6.25 V |
| Answer» E. | |
| 105. |
10 joules / coulombs = ________ volts. |
| A. | 1000 |
| B. | 10 |
| C. | 1 |
| D. | 100 |
| Answer» C. 1 | |
| 106. |
A battery has a short circuit current of 30 A and open circuit voltage of 24 V. If the battery is connected to an electric bulb of resistance 2 Ω, the power dissipated by the bulb is |
| A. | 80 W |
| B. | 1800 W |
| C. | 146.9 W |
| D. | 228 W |
| Answer» D. 228 W | |
| 107. |
Determine the conductance (in Siemens) of a conductor, when the potential difference between the ends of the conductor is 30 V and the current flowing through the conductor is 3 A |
| A. | 0.1 |
| B. | 1.1 |
| C. | 2.4 |
| D. | 4.2 |
| Answer» B. 1.1 | |
| 108. |
Electrical conductivity of a conductor is measured in ________. |
| A. | Siemens |
| B. | Ohms |
| C. | Siemens/meter |
| D. | Ohms/metre |
| Answer» D. Ohms/metre | |
| 109. |
Amount of electricity consumed by a 100 Watt bulb (in the ON state for 10 hours) is: |
| A. | 100 Watts per Hour |
| B. | 100 Watts |
| C. | 1kWh = 1 Unit of electricity |
| D. | 1000 Watts (1kW) |
| Answer» D. 1000 Watts (1kW) | |
| 110. |
In the electric-magnetic circuit analogy, what is electrical equivalent analogous of permeability and flux density respectively? |
| A. | Conductivity, current density |
| B. | Conductance, voltage |
| C. | Resistance, current |
| D. | Resistance, power |
| Answer» B. Conductance, voltage | |
| 111. |
A voltage source-series resistance combination is equivalent to a current source-parallel resistance combination if and only if their1. Respective open-circuit voltages are equal2. Respective short-circuit currents are equal3. Resistance remains same in both casesWhich of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 112. |
One unit of electricity is |
| A. | One Kilo volt |
| B. | One Kilo Watt |
| C. | One Kilo Watt Hour |
| D. | One Kilo Amp Hour |
| Answer» D. One Kilo Amp Hour | |
| 113. |
A 100 watt light bulb burns on an average of 10 hours a day for one week. The weekly consumption of energy will be _________ units. |
| A. | 7 |
| B. | 70 |
| C. | 0.7 |
| D. | 0.07 |
| Answer» B. 70 | |
| 114. |
A resistor is colour coded with blue, grey, orange and silver bands. Find the value. |
| A. | 6800 ± 5% ohms |
| B. | 4500 ± 10% ohms |
| C. | 6800 ± 10% ohms |
| D. | 4500 ± 5% ohms |
| Answer» D. 4500 ± 5% ohms | |
| 115. |
A current of 0.5 A is flowing through a 60 W light bulb. How many electrons will flow through the bulb each minute? |
| A. | 1.875 x 1012 electrons |
| B. | 1.875 x 109 electrons |
| C. | 1.875 x 1020 electrons |
| D. | – 1.875 x 1015 electrons |
| Answer» D. – 1.875 x 1015 electrons | |
| 116. |
A capacitor is charged by a constant current of 2 mA and results in a voltage increase of 12 V in a 10-sec interval. The value of capacitance is |
| A. | 0.75 milli Farad |
| B. | 24 milli Farad |
| C. | 12 milli Farad |
| D. | 1.67 milli Farad |
| Answer» E. | |
| 117. |
A voltage of 100 V is applied to a circuit of resistance of 10 Ω, the power dissipated (in watts) by the resistance will be__________. |
| A. | 100 |
| B. | 500 |
| C. | 1000 |
| D. | 1500 |
| Answer» D. 1500 | |
| 118. |
A portable machine requires a force of 200 N to move it. If the machine is moved 20 m is 25 s, the power consumed in doing this will be: |
| A. | 1,600 W |
| B. | 16 kW |
| C. | 160 kW |
| D. | 160 W |
| Answer» E. | |
| 119. |
Constantan is used for preparing resistance because: |
| A. | resistance shows no change with variation in temperature |
| B. | resistance of constantan is zero |
| C. | resistance is linearly proportional with temperature |
| D. | resistance varies exponentially with temperature |
| Answer» B. resistance of constantan is zero | |
| 120. |
Calculate the length of the wire required for an electric radiator to dissipate 1 kW when connected to a 230 V supply, if the coils of the radiator are made of wire 0.5 mm in diameter having the resistivity of 60 μΩ.cm |
| A. | 400 cm |
| B. | 753 cm |
| C. | 1732 cm |
| D. | 1456 cm |
| Answer» D. 1456 cm | |
| 121. |
In the case of liquid dielectric, as the gap spacing between the electrode increases, the breakdown voltage ____. |
| A. | decreases exponentially |
| B. | decreases parabolically |
| C. | increases |
| D. | decreases linearly |
| Answer» D. decreases linearly | |
| 122. |
In the circuit shown, the value of I is: |
| A. | 10 A |
| B. | 2 A |
| C. | 4 A |
| D. | 8 A |
| Answer» B. 2 A | |
| 123. |
In the figure shown below, if we connect a source of 2 V, with internal resistance of 1 Ω at AA’ with positive terminal at A, then current through R is |
| A. | 2 A |
| B. | 1.66 A |
| C. | 1 A |
| D. | 0.625 A |
| Answer» E. | |
| 124. |
In an AC circuit containing pure inductance, the voltage applied is 110 V, 50 Hz, while the current is 10 A. The value of inductance is: |
| A. | 30 mH |
| B. | 3.5 mH |
| C. | 3.0 mH |
| D. | 35 mH |
| Answer» E. | |
| 125. |
Admittance is reciprocal of |
| A. | Susceptance |
| B. | Impedance |
| C. | Reactance |
| D. | Conductance |
| Answer» C. Reactance | |
| 126. |
Directions: It consists of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I): Under the steady-state condition, a pure capacitor behaves as an open circuit for direct voltage.Statement (II): The current through a capacitor is proportional to the rate of change of voltage. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) | |
| 127. |
Based on the property of conductivity, select the odd one from the following.Manganin, Kanthal, Tantalum, Teflon |
| A. | Kanthal |
| B. | Teflon |
| C. | Tantalum |
| D. | Manganin |
| Answer» C. Tantalum | |
| 128. |
Find the value of the total electric current in the following circuit. |
| A. | 10 A |
| B. | 6.5 A |
| C. | 6 A |
| D. | 7.5 A |
| Answer» C. 6 A | |
| 129. |
For the network shown in the figure, calculate the effective resistance and the supply current. |
| A. | 1.23 Ω, 9.76 A |
| B. | 1.23 Ω, 4.88 A |
| C. | 13.7 Ω, 4.88 A |
| D. | 6.8 Ω, 9.76 A |
| Answer» B. 1.23 Ω, 4.88 A | |
| 130. |
Constant voltage source is |
| A. | Active and bilateral |
| B. | Passive and bilateral |
| C. | Active and unilateral |
| D. | Passive and unilateral |
| Answer» D. Passive and unilateral | |
| 131. |
A continuity equation is also called as the law of conservation of |
| A. | Mass |
| B. | Energy |
| C. | Charge |
| D. | Power |
| Answer» D. Power | |
| 132. |
Five cells are connected in series in a row and then four such rows are connected in parallel to feed the current to a resistive load of 1.25 Ω. Each cell has emf of 1.5 V with an internal resistance of 0.2 Ω. The current through load will be: |
| A. | 3.33 A |
| B. | 23.33 |
| C. | 5 A |
| D. | 1 A |
| Answer» D. 1 A | |
| 133. |
A 330 Ω resistor is in series with the parallel combination of four 1 kΩ resistors. A 100 V source is connected to the circuit. Which resistor has the most current through it? |
| A. | 330 Ω resistor |
| B. | Parallel combination of three 1 kΩ resistors |
| C. | Parallel combination of two 1kΩ resistors |
| D. | 1 kΩ resistor |
| Answer» B. Parallel combination of three 1 kΩ resistors | |
| 134. |
Electron Volt is a unit of |
| A. | Voltage |
| B. | Charge |
| C. | Momentum |
| D. | Energy |
| Answer» E. | |
| 135. |
A circuit consists of two parallel resistors, having a resistance of 20 Ω and 30 Ω respectively connected in series with 15 Ω. If the current through the 15 Ω resistor is 3A, then find the current through 20 Ω and 30 Ω resistors respectively. |
| A. | 1 A, 2 A |
| B. | 1.8 A, 1.2 A |
| C. | 1.2 A, 1.8 A |
| D. | 2 A, 1 A |
| Answer» C. 1.2 A, 1.8 A | |
| 136. |
In the following diagram, what is the current in the branch with the voltage source? |
| A. | 1 A |
| B. | 4 A |
| C. | 4.12 A |
| D. | 3 A |
| Answer» B. 4 A | |
| 137. |
An ideal current source should have: |
| A. | Infinite source resistance |
| B. | Large value of e.m.f |
| C. | Small value of e.m.f |
| D. | Zero source resistance |
| Answer» B. Large value of e.m.f | |
| 138. |
An uncharged capacitor of 0.01 F is charged first by a current of 2 mA for 30 s and then by a current of 4 mA for 30 s. The final voltage in it will be |
| A. | 12 V |
| B. | 18 V |
| C. | 24 V |
| D. | 30 V |
| Answer» C. 24 V | |
| 139. |
Determine the value of current I (in A) drawn from the voltage source for the circuit given below. |
| A. | 2.5 |
| B. | 3.4 |
| C. | 4.3 |
| D. | 6.5 |
| Answer» D. 6.5 | |
| 140. |
In the circuit if C1 = 2 μF and C2 = 3 μF, the equivalent capacitance between points A and B is: |
| A. | 4 μF |
| B. | 3 μF |
| C. | 1 μF |
| D. | 2 μF |
| Answer» D. 2 μF | |
| 141. |
A 680 Ω load resistor RL, is connected across a constant current source of 1.2 A. The internal source resistance, RS, is 12 k Ω. The load current through RL is |
| A. | 12 A |
| B. | 1.2 A |
| C. | 114 mA |
| D. | 1.14 A |
| Answer» E. | |
| 142. |
Analyze the diagram given below to find the electric current in the 5 Ω resistor. |
| A. | 4 A |
| B. | 3 A |
| C. | 1 A |
| D. | 4.12 A |
| Answer» C. 1 A | |
| 143. |
Determine the total charge entering a terminal between t = 1 s and t = 2 s, if the current passing the terminal is (3t2 - t) A. |
| A. | 3.5 C |
| B. | 6.5 C |
| C. | 4.5 C |
| D. | 5.5 C |
| Answer» E. | |
| 144. |
Determine the value of voltage V1 in the figure shown below:The value of V1 in volts is: |
| A. | 100 V |
| B. | 14.28 V |
| C. | 50 V |
| D. | 68.25 V |
| Answer» B. 14.28 V | |
| 145. |
In the circuit shown below, what is the voltage drop across R1? |
| A. | 4.8 V |
| B. | 9.6 V |
| C. | 19.2 V |
| D. | 28.8 V |
| Answer» D. 28.8 V | |
| 146. |
How many types of dependent sources are there? |
| A. | 1 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 147. |
Consider the following statements:Any element connected in1. Series with an ideal current source is redundant.2. Parallel with an ideal current source is redundant.3. Series with an ideal voltage source is redundant.4. Parallel with an ideal voltage source is redundant.Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 2 and 3 |
| C. | 2 only |
| D. | 1 and 4 |
| Answer» E. | |
| 148. |
If a differential charge dq is given a differential energy dw, the rise in potential of the charge is: |
| A. | \(I = \frac{{dq}}{{dw}}\) |
| B. | ∫ dq |
| C. | ∫ dw |
| D. | \(v = \frac{{dw}}{{dq}}\) |
| Answer» E. | |
| 149. |
Find the voltage across resistor R2? |
| A. | 7.078 V |
| B. | 5.5 V |
| C. | 7 V |
| D. | 2.078 V |
| Answer» B. 5.5 V | |
| 150. |
If Q is the charge and C be the capacitance, then the energy stored in the capacitor is given by________. |
| A. | \(\frac{Q}{{2c}}\) |
| B. | \(\frac{1}{2}QC\) |
| C. | \(\frac{{{Q^2}}}{{2C}}\) |
| D. | \(\frac{1}{{QC}}\) |
| Answer» D. \(\frac{1}{{QC}}\) | |