RESISTANCE OF A SYSTEM OF RESISTORS

Resistance of each resistor is R. Then the equivalent resistance across A and B is

The effective resistance of two resistors in parallel is (12)/(7) Omega . If one of the resistors is disconnected the resistance becomes 4 Omega . The resistance of the other resistor is

find the equivalent resistance between A and E(resistance of each resistor is R.

Find the equivalent resistance between terminals A and B. Each resistor is of resistance R.

Three resistors having resistances of 1.60 Omega, 2.40 Omega and 4.80 Omega are connected in parallel to a 28.0 V battery that has negligible internal resistance. Find (a) the equivalent resistance of the combination. (b) the current in each resistor. (c) the total current through the battery. (d) the voltage across each resistor. (e) the power dissipated in each resistor. (f) which resistor dissipates the maximum power the one with the greatest resistance or the least resistance? Explain why this should be.

Three resistors of 1 Omega, 2 Omega and 3 Omega are connected in parallel. The combined resistance of 3 resistors should be

When a 4V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resistor is:

Statement I : In the circuit in Fig. 7.46 , both cells are ideal and of fixed emf, the resistor R_(1) has fixed resistance and the resistance of resistor R_(2) can be varied ( but R_(2) is always non zero). Then the electric power delivered to the resistor of resistance R_(1) is independent of the value of resistance R_(2) . Statement II: If potential difference across a fixed resistance is unchanged , the poweer delivered to the resistor remains constant.