Resistors In Series And Parallel Combinations - Practice Questions & MCQ

In the given circuit, an ideal voltmeter connected across the $10 \Omega$ resistance reads 2 V . The internal resistance r (in $\Omega$ ), of each cell is :

A cell of emf $
90 \mathrm{~V}
$ is connected across series combination of two resistors each of $
100 \Omega
$ resistance. A voltmeter of resistance $
400 \Omega
$ is used to measure the potential difference across each resistor. The reading of the voltmeter will be:

Given below are two statements :
Statement I: The equivalent resistance of resistors in a series combination is smaller than the least resistance used in the combination.
Statement II: The resistivity of the material is independent of temperature.

In the light of the above statements, choose the correct answer from the options given below :

An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when  R₁=1 $ \Omega$ and  R₂ = 2 $ \Omega$       

                   

If n equal resistances are connected in series the equivalent resistance is found to be R. When $(n-3)$ of these resistance are connected in parallel equivalent resistance is found to be $\frac{R}{120}$. Then the value of n is?

In the circuit given, find the currents ${I }, I_1$ and $I_2$ in the circuit.