Q51 of 330 Page 43

You are given one hundred 1 Ω resistors. What is the smallest and largest resistance you can make in the circuit using these?

The greatest possible resistance is the series combination of the resistors.

In series combination of hundred 1 ohm resistors equivalent resistance will be 100 ohm

The least possible resistance is the parallel combination of the resistors.

When resistances are connected in parallel then

1/R =100

R= 1/100 =0.01 ohm

What is (a) highest, and (b) lowest, resistance which can be obtained by combining four resistors having the following resistances?

4Ω, 8Ω, 12Ω, 24Ω

What is the resistance between A and B in the figure given below?

You are supplied with a number of 100 Ω resistors. How could you combine some of these resistors to make a 250 Ω resistor?

The resistors R₁, R₂, R₃ and R₄ in the figure given below are all equal in value.

What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?