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#24 | Eddy Currents & Applications
(Physics) > Electromagnetic Induction
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Related Practice Questions :
Which of the following is not based on the application of eddy currents?
1. Speedometer
2. Dead-beat galvanometer
3. Energy meter
4. Tangent galvanometer
52%
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The slotting processes in a metallic sheet results in:
| 1. | The increase of the resistance in the path for circulation of current. |
| 2. | Decrease in the strength of eddy current. |
| 3. | A feeble in the electromagnetic damping. |
| 4. | All of these |
82%
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Eddy currents are produced in a material when it is:
| 1. | heated. |
| 2. | placed in an electric field. |
| 3. | placed in a uniform constant magnetic field. |
| 4. | placed in a time-varying magnetic field. |
79%
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Eddy currents are used in:
1. Induction furnace
2. Electromagnetic brakes
3. Speedometers
4. All of these
94%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Iron loss is minimized by using a laminated core. |
| Reason (R): | Lamination of core restricts eddy current. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
90%
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