Show in figure two p-n junction diodes along-with a resistanc R and a d.c. battery E. Indicate the path and direction of flow of appreciable current in the circuit.

Figure Shows a diode connected to an external resistance and an e.m.f. Assuming that the barrier potential developed in diode is 0.5 V, obtain the value of current in the circuit in milliampere.

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)

An electric lamp,whose resistance is 20 Omega and a conductor of 4 Omega resistance are connected to a 6V battery as shown in the figure.calculate (a) total resistance of the circuit(b) the current through the circuit (c) the p.d.across the electric lamp and conductor.

In the given figure R_1=5 ohm , R_2=20 ohm , R_3=10 ohm , R_4=20 ohm and a 10 V battery is connected to the arangement. Calculate the total current flowing in the circuit.

The figure SAQ 14(a) shows two identical rectangular loops (1) and (2) placed along with a straight long current carrying conductor between them. What will be the direction of induced currents in the loops when they are pulled away from the condutor with the same velocity v?

Two long straight parallel conductors 'a' and 'b', carrying steady currents Ia and Ib are separated by a distance d. Write the magnitude and direction of the magnetic field produced by the conductor 'a' at the points along the conductor 'b'.If the currents are flowing in the same direction, what is the nature and magnitude of the force between the two conductors ? F_(BA) = (mu_0I_A I_B L)/(2pid)

A current 'I' flows in a conductor placed perpendicular to the plane of paper. Indicate the direction of the magnetic field due to a small element d vecl at a point P situated at a distance vecr from the element as shown in the figure HQ 1.

A current of 10 A flow around a closed path in a circuit which is in the horizontal plane as shown in the figure. The circuit consists of eight alternative arcs of radii r_(1)=0.08m and r_(2)=0.12m . Each subtends the same angle at the centre. An infinitely long straight wire carrying a current of 10 A is passing throgh the entre of the above circuit vertically with the direction of the current being into the plane of the circuit. What is the force acting on the wire at the centre due to the current in the circuit? What is the force acting on the arc AC and the straight segment CD due to the current at the centre?

Two cells of e.m.f.6V and 12V and internal resisatnce lohm and 2ohm respectively are connecetd in parallel so as to send current in the same direction through an external resistance of 15ohm. calculate current in each branch of the circuit (c) potential difference across the 15 ohm resistor.

Two identical circular wires P and Q each of radius R and carrying current 'I' are kept in perpendicular planes such that they have a common centre as shown in the figure. Find the magnitude and direction of the net magnetic field at the common centre of the two coils.