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Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?
Answer: Option 2 Let'
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When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon?
Answer: Option 1 Let'
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Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is?
Answer: Option 1 Let'
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Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is?
Answer: Option 1 Let'
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When an iron piece is placed in a magnetic field?
Answer: Option 2 Let'
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Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statements : Wind is an inexhaustible source of energy and an aerogenerator can convert it into electricity. Though not much has been done in this field, the survey shows that there is vast potential for developing wind as alternative source of energy. Conclusions : I. Energy by wind is comparatively newly emerging field. II. The energy crisis can be dealt by exploring more in the field of aero-generation.?
Answer: Option 5 The phrase 'not much has been done in this field' indicates that wind energy is a comparatively newly emerging field. So, I follows. The expression 'there is...
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How does the magnetic compass needle behave in a magnetic field?
Answer: Option 3 Let'
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The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)?
Answer: Option 2 Let'
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According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. $$I$$P) is given by (where, A = Area of the section, $$I$$G = Moment of inertia of the section about an axis passing through its C.G. and h = Distance between C.G. and the parallel axis.)?
Answer: Option 1 Let'
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Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)?
Answer: Option 4 Let'
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