MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The relation between the Q factor of a coil measured by the Q Meter and the actual Q of the coil is _________ |
| A. | Equal to |
| B. | Same but somewhat lesser than |
| C. | Same but somewhat higher than |
| D. | Not equal to |
| Answer» C. Same but somewhat higher than | |
| 2. |
The average power absorbed by an impedance Z = 30 j 70 when a voltage V = 120 0 is applied is _____________ |
| A. | 35 |
| B. | 37.24 |
| C. | 45 |
| D. | 50.25 |
| Answer» C. 45 | |
| 3. |
A current of [2 + ( sqrt{2} )sin (314t + 30) + 2 ( sqrt{2} )cos (952t +45)] is measured with a thermocouple type, 5A full scale, class 1 meter. The meter reading would lie in the range? |
| A. | 5 A 1 % |
| B. | (2 + 3 ( sqrt{2} )) A 1% |
| C. | 3 A 1.7 % |
| D. | 2 A 2.5 % |
| Answer» D. 2 A 2.5 % | |
| 4. |
A (350 A/7A), 50 Hz current transformer has a primary bar. The secondary has a pure resistance of 1 . It also draws a current of 5 A. The magnetic core requires 350 AT for magnetization. Find the percentage ratio error. |
| A. | 10.56 |
| B. | -28.57 |
| C. | 11.80 |
| D. | -11.80 |
| Answer» C. 11.80 | |
| 5. |
The inductance of a certain moving- iron ammeter is expressed as L = 10 + 3 ( frac{ ^2}{4} ) H, where is the deflection in radian from the zero position. The control spring torque is 25 10-6 Nm/rad. If the meter is carrying a current of 5 A, the deflection is ____________ |
| A. | 2.4 |
| B. | 2.0 |
| C. | 1.2 |
| D. | 1.0 |
| Answer» D. 1.0 | |
| 6. |
A coil is designed for high Q performance at a rated voltage and a specified frequency. If the frequency is made twice the original and the coil is operated at the same rated voltage, then the active power P will be affected as ____________ |
| A. | P is halved |
| B. | P remains unchanged |
| C. | P is doubled |
| D. | P decreases 4 times |
| Answer» E. | |
| 7. |
A coil is designed for high Q performance at a rated voltage and a specified frequency. If the frequency is made twice the original and the coil is operated at the same rated voltage, then the Q factor will be affected as ____________ |
| A. | Q is halved |
| B. | Q remains unchanged |
| C. | Q is doubled |
| D. | Q increases or decreases but magnitude cannot be measured |
| Answer» D. Q increases or decreases but magnitude cannot be measured | |