Alternating Cur...

In case of $$AC$$ circuits, impedance is given by the ratio of
I. Peak values of voltage and current
II. rms values of voltage and current
III. Instantaneous values of voltage and current.

A loop is formed by two parallel conduction connected by a solenoid with inductance $$ L = 10^3 H $$ and a conducting rod of mass $$m=1 gm$$ which can freely slide (without friction) over a pair of conductors. The conductors are located in a horizontal plane in a uniform magnetic field $$B = 4 T $$ in the direction shown. The distance between conductors is equal to $$ t = 1 m. $$ At the moment $$ t = 0 $$ , the rod is imparted an initial velocity $$V_0$$ to the right. Determine angular frequency (in rad/s) of oscillation of rod.

A coil of $$10^{-2}\ H$$ inductance carries a current $$I=2\sin (100t)A$$. When current is half of its peak value then at that instant the induced emf in coil :-

Current in resistance is $$A$$, then

If $$\omega_t$$ and $$\omega_2$$ are half power frequencies of a series $$LCR$$ circuit, then resonant frequency $$\omega$$, can be expressed as :

In the given circuit, the $$AC$$ source has $$\omega=100\ rad/s$$. Considering the inductor and capacitor to be ideal, the correct choice(s) is(are)

The maximum value of a.c. voltage in a circuit is 707V. Its r.m.s. value is

Impedance of the following circuit will be:

In the given circuit the potential difference across resistance is $$54$$V and power consumed by it is $$16$$W. If AC frequency is $$60$$ Hz find the value of L.

If a cell of $$200V$$ is connected across an inductor, the current is found to be $$5A$$. When cell is replaced by $$200 V - 100 rad/s$$ supply, r.m.s. value of current becomes $$4A$$. The inductance of inductor is-