- Decreases
- Increases
- Remains same
- First increases and then decreases depending on the depth of iron in¬sertion
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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 number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?
Answer: Option 1 L = inductance is proportional to the number of turns per unit length. So self inductance becomes three times. if turns in a coil is trippled, self...
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The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as?
Answer: Option 1 Let'
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When current flows through heater coil it glows but supply wiring does not glow because?
Answer: Option 3 Let'
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What process prepares the magnetic surface of a disk by creating concentric circles, called tracks, around the disk (Each track is further divided into pic-shaped sections called sectors.)?
Answer: Option 2 The process of dividing the disk into tracks and sectors is called formatting. In computer disk storage, a sector is a subdivision of a track on a...
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Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)?
Answer: Option 1 Fourier's law of heat conduction is k. A. (dT/dx) where Q = Amount of heat flow through the body in unit time, A = Surface area of heat...
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Which direction is Sunny facing now Statements : I. If Sunny turns to his right and again turns to his right, he will be facing North. II. If Sunny walks some distance and turns left and again walks some distance, then his face will be towards left of Dinesh who is facing South.?
Answer: Option 3 From I, we conclude that Sunny is facing South, since a person facing South shall face North on turning to his right, twice. From II, we know that...
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Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer : I. The university authority has instructed all the colleges under its jurisdiction to ban use of all phones inside the college premises. II. Majority of the teachers of the colleges signed a joint petition to the university complaining the disturbances caused by cell phone ring-tones inside the classrooms.?
Answer: Option 2 Clearly, the university's decision came as a sequel to the complaint received by it from the college teachers against use of mobile phones in the college premises.
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A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by?
Answer: Option 2 Let'
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