If each diode in Fig. EP 14.31 has a forward bias resistance of `25 Omega` and infinite resistance in reverse bias, what will be the values of the currents `I_1`, `I_2`, `I_3` and `I_4`?

The circuit shown in the figure contains two diodes each with a forward resistance of 30 Omega and with infinite backward resistance. If the battery is 3 V, the current through the 100 Omega resistance (in ampere)

A wire has a resistance of 3.1 Omega at 30^@C and a resistance of 4.5 Omega at 100^@C . The temperature coefficient of the wire is equal to

Determine the values of currents I_1, I_2 and I_3 in the network shown in the figure.

If each of resistances in netwrok (Shown in fig.(a) is R, what i sthe resistance between the terminals A and B?

A resistor is connected to a battery of emf 10 V and internal resistance 0.3 Omega. What is the resistance of the resistor to be inserted in the circuit for the circuit current 1.2A?

A straight segment OC(of length L meter) of a circuit carrying a current I amp is placed along the x- axis ( fig.). Two infinitely long straight wires A and B , each extending from z = -oo to +oo , are fixed at y = -a meter and y = +a meter respectively, as shown in the figure. If the wires A and B each carry a current I amp into the plane of the paper, obtain the expression for the force acting on the segment OC. What will be the force on OC if the current in the wire B is reversed?

A rectangular loop has a sliding connector PQ of length l and resistance R. It is moving with a speed v as shown in the figure. The set up is placed in a uniform magnetic field goping into the plane of the paper. The three currents I_1 , I_2 and I are