InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
In a moving coil galvanometer, the deflection of the coil q is related to the electrical current i by the relationA. `I prop tan theta`B. `I prop theta`C. `I prop theta^(2)`D. `I prop sqrt(theta)` |
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Answer» Correct Answer - B |
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| 102. |
Electromagnets are made of soft iron because soft iron hasA. low retentivity and high coercive forceB. high retentivity and high coerive forceC. low retentivity and low coerciveD. high retentivity and low coercive force |
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Answer» Correct Answer - C Electromagnetics are made of soft iron because soft iron has low retentivity and lw coercive force or low coercivity . Soft iron is a soft magnetic material. |
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| 103. |
(a)Soft iron is a conductor of electricity. (b) It is a magnetic material. (c) It is an alloy of iron. (d) It is used for making permanent magnets. State whether:A. a and c are trueB. a and b are trueC. c and d are trueD. b and d are true |
| Answer» Correct Answer - B | |
| 104. |
Lorentx force can be calculated by using the formula.A. `F=q(E+vxxB)`B. `F=q(E-vxxB)`C. `F=q(E+v.B)`D. `F=q(Exxv+B)` |
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Answer» Correct Answer - B |
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| 105. |
Assertion If a charged particle is pronected in a region, where `B` is perpendicular to velocity of projection, then the net force acting on the particle is independent orf its mass. Reason The particle is performing uniform circular motion and force acting on it is `(mv^(2))/(r)`.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If Assertion is false but Reason is true. |
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Answer» Correct Answer - c |
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| 106. |
A conductor in the form of a right angle `ABC` with `AB=3 cm` and `BC = 4 cm` carries a current of `10 A`.There is a uniform magnetic field of `5 T` perpendicular to the palne of the conductor. The force on the conductor will beA. 1.5NB. 2.0NC. 2.5ND. 3.5N |
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Answer» Correct Answer - C `F=il B =10xx5xx10^(-2) =2.5N` |
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| 107. |
Two parallel wires carrying current in the same direction attract each other while two beams of electrons travelling in the same direction repel each other. Why?A. potential difference between themB. mutual inductance between themC. electric force between themD. magnetic force between them |
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Answer» Correct Answer - D |
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