A bar magnet of moment of inertia I is vibrated in a magnetic field of induction 0.4×10⁻⁴ T. The time period of vibration is 12 s. The magnetic moment of the magnet is 120Am². The […]
A p-n-p transistor is used in common emitter mode in an amplifier circuit. When base current is changed by an amount ∆Iв, then the collector current changes by 4 mA. If the current amplification factor […]
The necessary condition in making of a junction transistor (E- emitter, B- base and C- collector)
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(a) E and B are lightly doped and C is heavily doped (b) E is heavily […]
A 0.01 H inductor and √3 πΩ resistance are connected in series with a 220 V, 50 Hz Ac source. The phase difference between the current and emf is
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(a) π ∕ […]
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