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A conducting wire of cross-sectional area 1 cm²
has 3 × 10²³ charge carriers per m³. If wire carries a current of 24 mA, then drift velocity of carriers is

1 year ago | [YT] | 2

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On increasing the temperature, the specific resistance of a conductor and a semiconductor

1 year ago | [YT] | 2

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Potential inside a charged spherical shell is :

1 year ago | [YT] | 8

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20 mi.C charge is placed inside a closed surface; then flux linked with the surface is ø. If 80 mi.C charge is put inside the surface then change in flux is :–

1 year ago | [YT] | 4

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Certain positive charge is given to a conductor. Then its potential

1 year ago | [YT] | 5

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Four charges +Q, –Q, +Q and –Q are situated at the corners of a square; in a sequence then at the centre of the square :-

1 year ago | [YT] | 6

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Two charges 4q and q are placed at a distance d apart. A third charged particle Q is placed at the middle of them. If resultant force on q is zero then the value of Q is :

1 year ago | [YT] | 4

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Consider a neutral conducting sphere. A positive
point charge is placed outside the sphere. The net charge on the sphere is then :

1 year ago | [YT] | 4

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Which scientist discovered the radioactive element radium?

1 year ago | [YT] | 5

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Which of the following works on Pascal's law

1 year ago | [YT] | 7