List of top Physics Questions on Current electricity asked in COMEDK UGET

A student measures the terminal potential difference \( V \) of a cell of emf \( \varepsilon \) and internal resistance \( r \) as a function of the current \( I \) flowing through it. Which of the following graphs will give the values of emf \( \varepsilon \) and internal resistance \( r \)?

A galvanometer having a resistance of \(50\Omega\) is shunted by a wire of resistance \(10\Omega\). If the total current is \(2\,\text{A}\), the current passing through the shunt is:

Two wires A and B made of same material having length 10 cm and 40 cm respectively are connected in parallel to the same source of emf 10 V. What will be the ratio of the drift velocity of the electrons in the wire A to the drift velocity in the wire B?

A galvanometer of \( 50\Omega \) resistance is converted into an ammeter using a shunt resistance of \( 10\Omega \). If the same resistance is used to convert the same galvanometer into a voltmeter, what would be the ratio of the resistance of the ammeter to the resistance of the voltmeter?

Ten cells, each having internal resistance \( 1\Omega \) and emf \( 1.5 \, V \) are connected in series. But unknowingly 3 cells are connected wrongly in series. The effective internal resistance and emf of the series combination are respectively:

The wire made of Phosphor bronze is used as the suspension strip in the moving coil galvanometer, because: