MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A set up is such that there are three similar resistors, each of 20 ohms resistance. Two of them are connected in parallel, and this combination is connected in series with the third one. The maximum power that can be consumed by each resistor is 30 W. Then, what is the maximum power that can be consumed by the combination of all three resistors? |
| A. | 30 |
| B. | 20 |
| C. | 35 |
| D. | 45 |
| Answer» E. | |
| 2. |
Two resistors are connected in parallel, whose resistance values are in the ratio 3:1. Find the ratio of power dissipated. |
| A. | 1:3 |
| B. | 3:1 |
| C. | 1:2 |
| D. | 2:1 |
| Answer» B. 3:1 | |
| 3. |
Three resistors each of 5 ohms are connected in the form of a triangle. What is the resistance between the vertices? |
| A. | \(\frac {3}{10}\) |
| B. | \(\frac {10}{3}\) |
| C. | \(\frac {15}{50}\) |
| D. | \(\frac {2}{5}\) |
| Answer» C. \(\frac {15}{50}\) | |
| 4. |
Two wires of the same material have the same length but their radii are in the ratio of 5:3. They are combined in series, where the resistance of the thicker wire is 12 ohms. Calculate the total resistance of the combination. |
| A. | 40 |
| B. | 12 |
| C. | 32 |
| D. | 20 |
| Answer» D. 20 | |
| 5. |
Calculate resultant resistance between the points A and B in the circuit shown in the figure below. |
| A. | 4 ohms |
| B. | 2 ohms |
| C. | 8 ohms |
| D. | 6 ohms |
| Answer» C. 8 ohms | |
| 6. |
Pick out the correct statement from the following about parallel combination of resistors. |
| A. | The current across the resistors are the same |
| B. | The resistance offered by all resistors are the same |
| C. | The potential difference is same across each resistor |
| D. | The equivalent overall resistance is larger than the largest resistor |
| Answer» D. The equivalent overall resistance is larger than the largest resistor | |
| 7. |
The equivalent overall resistance is smaller than the smallest parallel resistor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Identify the combination which is not a series connection. |
| A. | Resistance box |
| B. | Decorative bulbs |
| C. | Fuses |
| D. | Domestic appliances |
| Answer» E. | |
| 9. |
What is the equivalent resistance of series combination of 3 resistors? |
| A. | Rs = R1 + R2 + R3 |
| B. | Rs = \(\frac {1}{(R_1 + R_2 + R_3 )}\) |
| C. | Rs = \(\frac {1}{R_1} + \frac {1}{R_2} + \frac {1}{R_3}\) |
| D. | Rs = \(\frac {(R_1 + R_2)}{R_3}\) |
| Answer» B. Rs = \(\frac {1}{(R_1 + R_2 + R_3 )}\) | |
| 10. |
In series connection of resistors, what happens to the current across each resistor? |
| A. | Increases |
| B. | Decreases |
| C. | Remain the same |
| D. | Initially increases and then decreases |
| Answer» D. Initially increases and then decreases | |