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qUESTIONS

An alternating voltage is given by e = 6 sin 314 t. find (i) the peak value (ii) frequency (iii) time period and (iv) instantaneous value at time t = 2 ms

A 100 μF capacitor is charged with a 50 V source supply. Then source supply is removed and the capacitor is connected across an inductance, as a result of which 5A current flows through the inductance. Calculate the value of the inductance.

A 10 uF capacitor is charged to a 25 volt of potential. The battery is disconnected and a pure 100 m H coil is connected across the capacitor so that LC oscillations are set up. Calculate the maximum current in the coil.

Calculate the value of capacity in picofarad, which will make 101.4 micro henry inductance to oscillate with frequency of one megahertz.

Find the time required for a 50 Hz alternating current to change its value from zero to the rms value.

Find the capacity of a capacitor which when put in series with a 10Ω resistor makes the power factor equal to 0.5. Assume an 80V-100Hz AC supply.

A capacitor of 100 uF, a coil of resistance 50 Ω and an inductance 0.5 H are connected in series with a 110 V-50Hz source. Calculate the rms value of current in the circuit.

A 25 uF capacitor, a 0.10 H inductor and a 25Ω resistor are connected in series with an AC source whose emf is given by e = 310 sin 314 t (volt). What is the frequency, reactance, impedance, current and phase angle of the circuit?

Alternating emf of e = 220 sin 100 лt is applied to a circuit containing an inductance of (1/π) henry. Write an equation for instantaneous current through the circuit. What will be the reading of the AC galvanometer connected in the circuit?

A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applied to a series LCR circuit in which R=30Ω, L = 25.48 mH and C = 796 μf. Find The impedance of the circuit i) ii) The phase difference between the voltage across source and the currents iii) The power factor iv) The power dissipated in the surface

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