Make a battery from four lemons and test it with a LED in the circuit. `(AS_(3))`

Explain the process of coating copper on iron key. Draw the circuit diagram. (AS_(3))

An inductor of 3H is connected to a battery of emf 6V through a resistance of 100 Omega . Calculate the time constant. What will be the maximum value of current in the circuit ?

If in Fig. 12.12, R_1 = 10 Omega , R_2 = 40 Omega , R_3 = 30 Omega , R_4 = 20 Omega , R_5 = 60 Omega , and a 12 V battery is connected to the arrangement. Calculate (a) the total resistance in the circuit, and (b) the total current flowing in the circuit.

In the circuit diagram given in Fig. 12.10, suppose the resistors R_1, R_2 and R_3 have the values 5 Omega , 10 Omega , 30 Omega , respectively, which have been connected in parallel to a battery of 12 V. Calculate (a) the current through each resistor, (b) the total current in the circuit, and (c) the total circuit resistance.

Does y = x + 7 represent a straight line ? Draw the line on the coordinate plane . At which point does this line intersect Y-axis ? How much angle does it make with X - axis ? Discuss with your friends . (AS_(3),AS_(5))

The potential difference across the terminals of a battery is 10 V when there is a current of 3A in the battery from the negative to the positive terminal. When the current is 2A in the reverse direction, the potential difference becomes 15 V. The internal resistance of the battery is

If the resistances are chosen for the circuit shown in figure in such a way that no current flows through the battery with emf E_(1) , the voltage V_(2) across R_(2) and the current I_(3) flowing through R_(3) are respectively,