Electromagnetic Induction questions
610 published questions with worked solutions.
- A varying current in a coil changes from 10 A to zero in 0.5 s, if average emf induced in the coil is 220 V. Then, the...
- An L-C circuit contains 10 mH inductor and a 25 F capacitor. The ratio of the time periods for the energy to be completely...
- In an L-C circuit, angular frequency at resonance is . What will be the new angular frequency when inductor's inductance is made...
- A charged 30 , F capacitor is connected to a 27 , mH inductor. What is the angular frequency of free oscillations of the circuit?
- A charged 40 , F capacitor is connected to a 16 , mH inductor. What is the angular frequency of free oscillations of the circuit?
- A 10 , F capacitor is charged to 25 , V of potential. The battery is then disconnected and a pure 100 , mH coil is connected...
- A 1.5 , mH inductor in an L − C circuit stores a maximum energy of 30 , J . The rms value of current in the circuit is
- The natural frequency of an L − C circuit is 125000 cycle/s . Then, the capacitor C is replaced by another capacitor with a...
- Alternating current of peak value ( 2 ) ampere flows through the primary coil of the transformer. The coefficient of mutual...
- The frequency of oscillation in oscillator is (where L- inductance C- capacitance in a circuit) :
- In oscillatory circuit reactive components are connected in :
- Tank circuit of oscillator consists of
- In an oscillator circuit L = 10^ -3 H, and C = 2 . The frequency of oscillation is
- In the circuit of transistor as an amplifier, tank circuit consists of inductance of 450 mH and capacitance of 9 . The frequency...
- The resonance frequency of the tank circuit of an oscillator when L = 10 ^2 mH and C = 0.04 are connected in parallel is
- For a coil having L = 2 mh, current flow through it is I = t^2e^ -t then the time at which emf become zero : -
- The magnetic flux through a circuit of resistance R changes by an amount in a time t. Then the total quantity of electric charge...
- A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of...
- A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series...
- Two coils of self inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked...
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