MCQOPTIONS
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MCQOPTIONS
This section includes 236 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
In Thevenin’s theorem Vth is __________ |
| A. | Sum of two voltage sources |
| B. | A single voltage source |
| C. | Infinite voltage sources |
| D. | 0 |
| Answer» C. Infinite voltage sources | |
| 152. |
Find the equivalent resistance between A and B. |
| A. | 32ohm |
| B. | 31ohm |
| C. | 30ohm |
| D. | 29ohm |
| Answer» E. | |
| 153. |
Calculate Vth for the given circuit. |
| A. | 5.54V |
| B. | 3.33V |
| C. | 6.67V |
| D. | 3.67V |
| Answer» D. 3.67V | |
| 154. |
Find the value of Vx due to the 10V source. |
| A. | 1V |
| B. | 2V |
| C. | 3V |
| D. | 4V |
| Answer» C. 3V | |
| 155. |
Calculate the current across the 4 ohm resistor. |
| A. | 0.86A |
| B. | 1.23A |
| C. | 2.22A |
| D. | 0.67A |
| Answer» B. 1.23A | |
| 156. |
Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at C will be? |
| A. | Rac/(Rab+Rbc+Rca) |
| B. | Rab/(Rab+Rbc+Rca) |
| C. | Rbc*Rac/(Rab+Rbc+Rca) |
| D. | Rab/(Rab+Rbc+Rca) |
| Answer» D. Rab/(Rab+Rbc+Rca) | |
| 157. |
Isc is found across the ____________ terminals of the network. |
| A. | Input |
| B. | Output |
| C. | Neither input nor output |
| D. | Either input or output |
| Answer» C. Neither input nor output | |
| 158. |
Calculate the Thevenin resistance across the terminal AB for the following circuit. |
| A. | 4.34 ohm |
| B. | 3.67 ohm |
| C. | 3.43 ohm |
| D. | 2.32 ohm |
| Answer» C. 3.43 ohm | |
| 159. |
A voltage source connected in series with a resistor can be converted to a? |
| A. | Current source in series with a resistor |
| B. | Current source in parallel with a resistor |
| C. | Voltage source in parallel with a resistor |
| D. | Cannot be modified |
| Answer» C. Voltage source in parallel with a resistor | |
| 160. |
In superposition theorem, when we consider the effect of one current source, all the other current sources are ____________ |
| A. | Shorted |
| B. | Opened |
| C. | Removed |
| D. | Undisturbed |
| Answer» C. Removed | |
| 161. |
Find the node voltage V. |
| A. | 1V |
| B. | 2V |
| C. | 3V |
| D. | 4V |
| Answer» E. | |
| 162. |
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 |
| Answer» D. Ra+Rc+Ra*Rc/Rb | |
| 163. |
Find Vx due to the 3A source. |
| A. | 56V |
| B. | 78V |
| C. | 38V |
| D. | 48V |
| Answer» E. | |
| 164. |
Find the value of Vx due to the 16V source. |
| A. | 4.2V |
| B. | 3.2V |
| C. | 2.3V |
| D. | 6.3V |
| Answer» C. 2.3V | |
| 165. |
Find the value of V1 and V2. |
| A. | 87.23V, 29.23V |
| B. | 23.32V, 46.45V |
| C. | 64.28V, 16.42V |
| D. | 56.32V, 78, 87V |
| Answer» D. 56.32V, 78, 87V | |
| 166. |
Calculate the node voltages. |
| A. | 30.77V, 7.52V, 18.82V |
| B. | 32.34V, 7.87V, 8.78V |
| C. | 34.34V, 8.99V, 8.67V |
| D. | 45.44V, 6.67V, 7.77V |
| Answer» B. 32.34V, 7.87V, 8.78V | |
| 167. |
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 |
| Answer» B. 1ohm, 3ohm, 2ohm | |
| 168. |
Which of the following is also known as the dual of Norton’s theorem? |
| A. | Thevenin’s theorem |
| B. | Superposition theorem |
| C. | Maximum power transfer theorem |
| D. | Millman’s theorem |
| Answer» B. Superposition theorem | |
| 169. |
Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at B will be? |
| A. | Rac/(Rab+Rbc+Rca) |
| B. | Rab/(Rab+Rbc+Rca) |
| C. | Rbc*Rab/(Rab+Rbc+Rca) |
| D. | Rab/(Rab+Rbc+Rca) |
| Answer» D. Rab/(Rab+Rbc+Rca) | |
| 170. |
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 |
| Answer» D. R1=Ra*Rb/Rc, R2=Rc*Rb/Ra, R3=Ra*Rc/Rb | |
| 171. |
Find the voltage due to the 15A source. |
| A. | 0V |
| B. | 2V |
| C. | 4V |
| D. | 6V |
| Answer» B. 2V | |
| 172. |
If ZL=Zs’, then RL=? |
| A. | -RL |
| B. | Rs |
| C. | -Rs |
| D. | 0 |
| Answer» C. -Rs | |
| 173. |
Which of the following is also known as the dual of Thevenin’s theorem? |
| A. | Norton’s theorem |
| B. | Superposition theorem |
| C. | Maximum power transfer theorem |
| D. | Millman’s theorem |
| Answer» B. Superposition theorem | |
| 174. |
A current source connected in parallel with a resistor can be converted to a? |
| A. | Current source in series with a resistor |
| B. | Voltage source in series with a resistor |
| C. | Voltage source in parallel with a resistor |
| D. | Cannot be modified |
| Answer» C. Voltage source in parallel with a resistor | |
| 175. |
I1 is the current flowing in the first mesh. I2 is the current flowing in the second mesh and I3 is the current flowing in the top mesh. If all three currents are flowing in the clockwise direction, find the value of I1, I2 and I3. |
| A. | 7.67A, 10.67A, 2A |
| B. | 10.67A, 7.67A, 2A |
| C. | 7.67A, 8.67A, 2A |
| D. | 3.67A, 6.67A, 2A |
| Answer» B. 10.67A, 7.67A, 2A | |
| 176. |
Calculate the mesh currents. |
| A. | 7A, 6A, 6.22A |
| B. | 2A, 1A, 0.57A |
| C. | 3A, 4A, 5.88A |
| D. | 6A, 7A, 8.99A |
| Answer» C. 3A, 4A, 5.88A | |
| 177. |
Calculate the mesh currents I1 and I2 flowing in the first and second meshes respectively. |
| A. | 1.75A, 1.25A |
| B. | 0.5A, 2.5A |
| C. | 2.3A, 0.3A |
| D. | 3.2A, 6.5A |
| Answer» B. 0.5A, 2.5A | |
| 178. |
Find the value of V1 if the current through the 1 ohm resistor=0A. |
| A. | 83.33V |
| B. | 78.89V |
| C. | 87.87V |
| D. | 33.33V |
| Answer» B. 78.89V | |
| 179. |
Find the value of V if the current in the 3 ohm resistor=0. |
| A. | 3.5V |
| B. | 6.5V |
| C. | 7.5V |
| D. | 8.5V |
| Answer» D. 8.5V | |
| 180. |
Does the 15A source have any effect on the circuit? |
| A. | Yes |
| B. | No |
| C. | Cannot be determined |
| D. | Yes, only when the 10V source is removed |
| Answer» C. Cannot be determined | |
| 181. |
Find the value of the source voltage from the following circuit. |
| A. | 49.2V |
| B. | 34.6V |
| C. | 65.2V |
| D. | 25.6V |
| Answer» B. 34.6V | |
| 182. |
Nodal analysis is generally used to determine______ |
| A. | Voltage |
| B. | Current |
| C. | Resistance |
| D. | Power |
| Answer» B. Current | |
| 183. |
Calculate Eth. |
| A. | 3.43V |
| B. | 4.57V |
| C. | 3.23V |
| D. | 5.34V |
| Answer» C. 3.23V | |
| 184. |
Calculate the maximum power transferred. |
| A. | 1.79W |
| B. | 4.55W |
| C. | 5.67W |
| D. | 3.78W |
| Answer» B. 4.55W | |
| 185. |
Mesh analysis is generally used to determine _________ |
| A. | Voltage |
| B. | Current |
| C. | Resistance |
| D. | Power |
| Answer» C. Resistance | |
| 186. |
Find the equivalent star network. |
| A. | 2.3ohm, 2.3ohm, 2.3ohm |
| B. | 1.2ohm, 1.2ohm, 1.2ohm |
| C. | 3.3ohm, 3.3ohm, 3.3ohm |
| D. | 4.5ohm, 4.5ohm, 4.5ohm |
| Answer» C. 3.3ohm, 3.3ohm, 3.3ohm | |
| 187. |
The value of the 3 resistances when connected in star connection is_________ |
| A. | 2.32ohm,1.22ohm, 4.54ohm |
| B. | 3.55ohm, 4.33ohm, 5.67ohm |
| C. | 2.78ohm, 1.67ohm, 0.83ohm |
| D. | 4.53ohm, 6.66ohm, 1.23ohm |
| Answer» D. 4.53ohm, 6.66ohm, 1.23ohm | |
| 188. |
Once the circuit is transformed into a current source where will the resistance be connected? |
| A. | In series with the current source |
| B. | In parallel with the current source |
| C. | The resistance is removed from the circuit |
| D. | Resistance is multiplied by 10 and connected in parallel with the source |
| Answer» C. The resistance is removed from the circuit | |
| 189. |
Once the circuit is transformed to a voltage source where will the resistance be connected? |
| A. | In series with the voltage source |
| B. | In parallel with the voltage source |
| C. | The resistance is removed from the circuit |
| D. | Resistance is multiplied by 10 and connected in series with the source |
| Answer» B. In parallel with the voltage source | |
| 190. |
Calculate the Norton resistance for the following circuit if 5 ohm is the load resistance. |
| A. | 10 ohm |
| B. | 11 ohm |
| C. | 12 ohm |
| D. | 13 ohm |
| Answer» D. 13 ohm | |
| 191. |
Calculate the short circuit current is the 5 ohm resistor is the load resistance. |
| A. | 0.72A |
| B. | 0.32A |
| C. | 0.83A |
| D. | 0.67A |
| Answer» B. 0.32A | |
| 192. |
Find the current in the 5 ohm resistance using Norton’s theorem. |
| A. | 1A |
| B. | 1.5A |
| C. | 0.25A |
| D. | 0.5A |
| Answer» E. | |
| 193. |
Calculate the node voltages V1 and V2. |
| A. | 12V, 13V |
| B. | 26.67V, 11.33V |
| C. | 11.33V, 26.67V |
| D. | 13V, 12V |
| Answer» D. 13V, 12V | |
| 194. |
Find the value of the node voltage V. |
| A. | -60V |
| B. | 60V |
| C. | 40V |
| D. | -40V |
| Answer» B. 60V | |
| 195. |
Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at A will be? |
| A. | Rab*Rac/(Rab+Rbc+Rca) |
| B. | Rab/(Rab+Rbc+Rca) |
| C. | Rbc*Rac/(Rab+Rbc+Rca) |
| D. | Rac/(Rab+Rbc+Rca) |
| Answer» B. Rab/(Rab+Rbc+Rca) | |
| 196. |
Can we use Thevenin’s theorem on a circuit containing a BJT? |
| A. | Yes |
| B. | No |
| C. | Depends on the BJT |
| D. | Insufficient data provided |
| Answer» C. Depends on the BJT | |
| 197. |
The Norton current is the_______ |
| A. | Short circuit current |
| B. | Open circuit current |
| C. | Open circuit and short circuit current |
| D. | Neither open circuit nor short circuit current |
| Answer» B. Open circuit current | |
| 198. |
Find the value of the source current from the following circuit. |
| A. | 2.54A |
| B. | 6.67A |
| C. | 3.35A |
| D. | 7.65A |
| Answer» B. 6.67A | |
| 199. |
Find the value of voltage once source transformation is applied to the circuit. |
| A. | 10V |
| B. | 30V |
| C. | 50V |
| D. | 70V |
| Answer» D. 70V | |
| 200. |
What will the value of the current be once source transformation is applied to the circuit? |
| A. | 10A |
| B. | 20A |
| C. | 30A |
| D. | 40A |
| Answer» B. 20A | |