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qUESTIONS

MCQs-PYQs-12th-jee

A steady conductor is flowing through a cylindrical conductor

MCQs-PYQs-12th-jee

Biot Savart law indicates that the moving electrons velocity v produce a magnetic field B such that

MCQs-PYQs-12th-jee

For the magnetic field to be maximum due to a small element of a current-carrying conductor at a point, the angle between the element and the line joining the element to the given point must be

MCQs-PYQs-12th-jee

When a wire is oriented in an east-west direction and carries an eastward current, the magnetic field at a point to the south of the wire is

MCQs-PYQs-12th-jee

Energy in a current carrying conductor is stored in the form of

A source of e.m.f. E = 15 V and having negligible internal resistance is connected to a variable resistance so that the current in the circuit increases with time as i = 1.2t+3. Then, the total charge that will flow in first five seconds will be

When the current i is flowing through a conductor, the drift velocity is v. If 2i current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be

In a neon discharge tube 2.9×10^18 Ne+ ions move to the right each second while 1.2×10^18 electrons move to the left per second. Electron charge is 1.6×10^-19 C. The current in the discharge tube

A current of 1 mA is flowing through a copper wire. How many electrons will pass a given point in one second [e=1.6 x 10-19 Coulomb]

62.5×10^18 electrons per second are flowing through a wire of area of cross-section 0.1 m^2, the value of current flowing will be

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