357334
A resistance of \(4\,\Omega \) and a wire of length \(5\,cm\) and resistance \(5\,\Omega \) are joined in series and connected to a cell of \(e.m.f.\) \(10{\rm{ }}V\) and internal resistance \(1\,\Omega \). A parallel combination of two identical cells is balanced across \(300\,cm\) of the wire. The \(e.m.f.\) \(E\) of each cell is :
357336 A potentiometer having the potential gradient of 2\(mV\)/\(cm\) is used to measure the difference of potential across a resistance of 10 ohm. If a length of 50\(cm\) of the potentiometer wire is required to get the null point, the current passing through the 10 ohm resistor is (in \(mA\)):
357334
A resistance of \(4\,\Omega \) and a wire of length \(5\,cm\) and resistance \(5\,\Omega \) are joined in series and connected to a cell of \(e.m.f.\) \(10{\rm{ }}V\) and internal resistance \(1\,\Omega \). A parallel combination of two identical cells is balanced across \(300\,cm\) of the wire. The \(e.m.f.\) \(E\) of each cell is :
357336 A potentiometer having the potential gradient of 2\(mV\)/\(cm\) is used to measure the difference of potential across a resistance of 10 ohm. If a length of 50\(cm\) of the potentiometer wire is required to get the null point, the current passing through the 10 ohm resistor is (in \(mA\)):
357334
A resistance of \(4\,\Omega \) and a wire of length \(5\,cm\) and resistance \(5\,\Omega \) are joined in series and connected to a cell of \(e.m.f.\) \(10{\rm{ }}V\) and internal resistance \(1\,\Omega \). A parallel combination of two identical cells is balanced across \(300\,cm\) of the wire. The \(e.m.f.\) \(E\) of each cell is :
357336 A potentiometer having the potential gradient of 2\(mV\)/\(cm\) is used to measure the difference of potential across a resistance of 10 ohm. If a length of 50\(cm\) of the potentiometer wire is required to get the null point, the current passing through the 10 ohm resistor is (in \(mA\)):
357334
A resistance of \(4\,\Omega \) and a wire of length \(5\,cm\) and resistance \(5\,\Omega \) are joined in series and connected to a cell of \(e.m.f.\) \(10{\rm{ }}V\) and internal resistance \(1\,\Omega \). A parallel combination of two identical cells is balanced across \(300\,cm\) of the wire. The \(e.m.f.\) \(E\) of each cell is :
357336 A potentiometer having the potential gradient of 2\(mV\)/\(cm\) is used to measure the difference of potential across a resistance of 10 ohm. If a length of 50\(cm\) of the potentiometer wire is required to get the null point, the current passing through the 10 ohm resistor is (in \(mA\)):