Cells, EMF, Internal Resistance — Prelims Questions

A cell of EMF $2,\text{V}$ and internal resistance $0.5,Omega$ is connected across a resistor of $3.5,Omega$. The terminal potential difference across the cell is:

Two cells, each of EMF $2,\text{V}$ and internal resistance $0.1,Omega$, are connected in series. This combination is then connected to an external resistance of $3.8,Omega$. What is the current flowing through the external resistance?

Four identical cells, each of EMF $1.5,\text{V}$ and internal resistance $0.2,Omega$, are connected in parallel. The equivalent EMF and equivalent internal resistance of the combination are:

A cell has an EMF $E$ and internal resistance $r$. When it is connected to an external resistance $R$, the terminal potential difference is $V$. Which of the following statements is true?

A cell supplies a current of $0.9,\text{A}$ through a $2,Omega$ resistor and a current of $0.3,\text{A}$ through a $7,Omega$ resistor. The internal resistance of the cell is:

Which of the following factors does NOT affect the internal resistance of a cell?