MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Identify the relation between charge flow and change in magnetic flux. |
| A. | Q = <sub>B</sub> r |
| B. | Q = 2 ;<sub>B</sub> r |
| C. | Q = ( frac { triangle Phi_B}{r} ) |
| D. | Q = ( frac { triangle Phi_B}{2r} ) |
| Answer» D. Q = ( frac { triangle Phi_B}{2r} ) | |
| 2. |
What is the magnitude of the force on a current carrying conductor of length L in a perpendicular magnetic field B? |
| A. | F= ( frac {I}{lB} ) |
| B. | F=IlB<sup>2</sup> |
| C. | F=I<sup>2</sup> lB |
| D. | F=IlB |
| Answer» E. | |
| 3. |
Mechanical energy is initially converted into thermal energy in the case of motional emf. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
A circular coil having an area of 3.14 10-2 m2 and 30 turns is rotated about its vertical diameter with an angular speed of 70 rad-1 in a uniform horizontal magnetic field of magnitude 5 10-2 T. If the coil forms a closed loop of resistance 15 , what is the average power loss due to Joule heating? |
| A. | 0.360 |
| B. | 0.362 |
| C. | 0.724 |
| D. | 0.726 |
| Answer» C. 0.724 | |
| 5. |
Pick out the expression for power in a rectangular conductor from the following. |
| A. | P= ( frac {B^2 l^2 v}{R} ) |
| B. | P= ( frac {B^2 lv^2}{R} ) |
| C. | P= ( frac {B^2 l^2 v^2}{R} ) |
| D. | P= ( frac {B^2 l^2 v^2}{R^2} ) |
| Answer» D. P= ( frac {B^2 l^2 v^2}{R^2} ) | |
| 6. |
Identify the significance of energy consideration from the following. |
| A. | Energy consideration provides a link between the force and energy |
| B. | Energy consideration provides a link between the current and energy |
| C. | Energy consideration provides a link between the mechanical and thermal energy |
| D. | Energy consideration provides a link between the voltage and energy |
| Answer» B. Energy consideration provides a link between the current and energy | |