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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

An alternating voltage given by e = 140 sin 3142 t is connected across a pure resistor of 50 Ω. Find (i) the frequency of the source (ii) the rms current through the resistor.

An inductor of inductance 200 mH is connected to an AC source of peak emf 210 V and frequency 50 Hz. Calculate the peak current. What is the instantaneous voltage of the source when the current is at its peak value?

A Capacitor of 2 μF is connected to an AC source of emf e = 250 sin 100πt. Write an equation for instantaneous current through the circuit and give reading of AC ammeter connected in the circuit.

A 100mH inductor, a 25 μF capacitor and a 15 Ω resistor are connected in series to a 120 V, 50 Hz AC source. Calculate (i) impedance of the circuit at resonance (ii) current at resonance (iii) Resonant frequency

A coil of 0.01H inductance and 1Ω resistance is connected to 200V, 50Hz AC supply. Find the impedance of the circuit and time lag between maximum alternating voltage and current.

A 100 Ω resistor is connected to a 220V, 50Hz supply (i) What is the rms value current in the circuit? (ii) What is the net power consumed over a full cycle?

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

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 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?

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