Current Electri...

In the given circuit, it is observed that the current I is independent of the value of the resistance R₆. Then the resistance values must satisfy

In the given circuit, with steady current, the potential drop across the capacitor must be

A wire of length L and 3 identical cells of negligible internal resistances are connected in series. Due to current, the temperature of the wire is raised by ∆T in time t. A number N of similar cells is now connected in series with a wire of the same material and cross-section but of length 2L. The temperature of the wire is raised by the same amount ∆T in the same time t. The value of N is

What is the equivalent resistance between the points A and B of the network?

The effective resistance between points P and Q of the electrical circuit shown in the figure is

The current in a conductor varies with time t as I = 2t + 3t² where I is in ampere and t in seconds. Electric charge flowing through a section of the conductor during t = 2 sec to t = 3 sec is

A group of N cells whose e.m.f varies directly with the internal resistance as per the equation E_N = 1.5 r_N are connected as shown in the figure below. The current I in the circuit is

The resistance of a wire of iron is 10 ohm and temp, coefficient of resistance is 5 × 10^–3/° C. At 20°C it carries 30 milliampere of current. Keeping constant potential difference between its ends, the temperature of the wire is raised to 120°C . The current in milliampere that flows in the wire is

Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is

A battery of internal resistance 4 Ω is connected to the network of resistances as shown. In order to give the maximum power to the network, the value of R (in Ω) should be