Current Electri...

Two cells of emf's approximately $$5$$V and $$10$$V are to be accurately compared using a potentiometer of length $$400$$cm.

In the network shown in the figure, the equivalent resistance between A and C is

If $${i}_{1}=3\sin{\omega t}$$ and $${i}_{2}=4\cos{\omega t}$$, then $${i}_{3}$$ is -

If the figure shows a part of an electric circuit, then the current $$I$$ is

Consider a cube as shown in the fig-1; with uniformly distributed charge within its volume. The potential at one of its vertex P is $${V_0}$$.A cubical portion of half the size (half edge length) of the original cube is cut and removed as shown in the fig-2. Find the modulus of potential at the point P in the new structure. 

The number of turns in th coil of an $$ac$$ generator is $$5000$$ and the area of the coil is $$0.25\ {m}^{2}$$. The coil is rotated at the rate of $$100$$ cycles/s in a magnetic field of $$0.2\ T$$. The peak value of emf generated is nearly:

 The net resistance between $${\text{X and Y}}$$ is 

In the following part of the circuit, potential difference between points A and B equals to

If current $$I_1 = 3A$$ sin $$\omega t$$ and $$I_2 = 4A$$ cos $$\omega t$$, then $$I_3$$ is :

Two wires of same dimensions but resistivities $${\rho _1}$$ and $${\rho_2}$$ are connected in series. The equivalent resistivity of the combination is: