List of top Physics Questions on Cells, Emf, Internal Resistance asked in CUET (UG)

Five cells, each of emf \((E)\) and internal resistance \((r)\), are connected in series. If out of these five cells, one of the cells is connected with opposite polarity, the equivalent emf and internal resistance of the combination, respectively, will be

For a cell or a battery, the emf is (A) equal to the potential difference between its terminals when terminals are not connected externally (B) less than the potential difference between its terminals when the cell/battery is being discharged (C) always greater than the potential difference between its terminals (D) less than the potential difference between its terminals when the cell/battery is being charged Choose the correct answer from the options given below:

A battery of emf \(15\ \text{V}\) and internal resistance of \(4\ \Omega\) is connected to a resistor. If the current in the circuit is \(2\ \text{A}\), the resistance of the resistor and terminal voltage of the battery will be:

The value of current \(I\) in the electrical circuit as given below, when potential at \(A\) is equal to the potential at \(B\), will be _____ A. graphics[width=0.5\linewidth]{Q5.png}

In the circuit shown below, the potential difference between A and B is: graphics[width=0.5\linewidth]{Q1.png}

A battery of emf 12 V and internal resistance 3 \(\Omega\) is connected to an external resistor. If the current in the circuit is 0.6 A, the voltage across the external resistor will be