In an ac circuit, V and I are given by V = 100 sin 100t volts, I = 100 sin The power dissipated (in Watts) in circuit is
In the circuit shown below, the ac source has voltage V = 20cos(ωt) Volts with ω = 2000 the amplitude of the current (in Amperes) will be nearest to
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The power factor of a good choke coil is nearly.
A coil of 200Ω resistance and 1.0H inductance to an ac source of frequency 200/ 2π Hz. Phase angle (in degree) between potential and current will be
When 100V D.C. is applied across solenoid a current of 1.0A flows in it. When 100 V A.C. is applied across the same coil the current drops to 0.5A. If the frequency of the A.C. source is 50Hz, the impedance (in Ω) of the solenoid is.
In the figure shown, a current of 2A flows in the circuit. The impedance (in Ω) of the circuit is
In an ac circuit the current is given by i = 0.5sin(314t + 60º)mA. The peak to peak value of current is (in mA).
A steady dc current of 2.83A is flowing in a resistance wire. The rms value of the current (in Amperes) is :
In series LCR circuit the voltage across R, L and C are shown in figure. The Voltage (in Volts) of applied source is :
The power factor of LCR circuit at resonance is