MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your AIIMS UG knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If two bulbs of wattages 25 and 100 W respectively each rated by 220 V are connected in series with the supply of 440 V, which bulb will fuse? |
| A. | 100 W bulb |
| B. | 25 W bulb |
| C. | None of them |
| D. | Both of them |
| Answer» C. None of them | |
| 2. |
An AC ammeter is used to measure current in a circuit. When a given direct current passes through the circuit, the AC ammeter reads 3 A. When another alternating current passes through the circuit, the AC ammeter reads 4 A. Then the reading of this ammeter, if DC and AC How through the circuit simultaneously, Is |
| A. | 3A |
| B. | 4A |
| C. | 7A |
| D. | 5A |
| Answer» E. | |
| 3. |
A thin magnetic needle vibrates in the horizontal plane with a period of 4 s. The needle is cut into two halves by a plane normal to magnetic axis of the needle. Then the period of vibration of each half needle is approximately |
| A. | 4s |
| B. | 2s |
| C. | 8s |
| D. | 1s |
| Answer» C. 8s | |
| 4. |
A fork A has frequency 2% more than the standard fork and B has a frequency 3% less than the frequency of same standard fork. The forks A and B when sounded together produced 6 beats/s. The frequency of fork A is |
| A. | 116.4 Hz |
| B. | 120 Hz |
| C. | 122.4 Hz |
| D. | 238.8 Hz |
| Answer» D. 238.8 Hz | |
| 5. |
Application of a forward bias to a p-n junction |
| A. | increases the number of donors on the n-side |
| B. | increases the electric field in the depletion zone |
| C. | increases the potential difference across the depletion zone |
| D. | widens the depiction zone |
| Answer» B. increases the electric field in the depletion zone | |
| 6. |
The ratio of the dimensions of Planck’s constant and that of the moment of inertia is the dimensions of |
| A. | frequency |
| B. | velocity |
| C. | angular momentum |
| D. | time |
| Answer» B. velocity | |
| 7. |
A body of mass m rises to a height h = R/5 from the earth’s surface where R is earth’s radius. If g is acceleration due to gravity at the earth’s surface, the increase in potential energy will be |
| A. | mgh B |
| B. | 4/5 mgh |
| C. | 5/6 mgh |
| D. | 6/7 mgh |
| Answer» D. 6/7 mgh | |
| 8. |
When an ideal monoatomic gas is heated at consant pressure, fraction of heat energy supplied which increases the internal energy of gas, is |
| A. | 2/5 |
| B. | 3/5 |
| C. | 3/7 |
| D. | 3/4 |
| Answer» C. 3/7 | |