Electrical Instruments
PHXII03:CURRENT ELECTRICITY

357333 Two cells of emf’s approximately 5\(V\) and 10\(V\) are accurately compared using a potentiometer of length 400 \(cm\).

1 Potentiometer is usually used for comparing resistances and not voltages
2 The battery of potentiometer can have a voltage of 15\(V\) and resistance of the wire is adjusted so that the potential drop across the wire slightly exceeds 10\(V\)
3 The battery that runs the potentiometer should have voltage of 8\(V\)
4 The first portion of 50 \(cm\) of wire itself should have a potential drop of 10\(V\)
PHXII03:CURRENT ELECTRICITY

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 :
supporting img

1 \(1.5\;V\)
2 \(0.67\;V\)
3 \(3.0\;V\)
4 \(1.33\;V\)
PHXII03:CURRENT ELECTRICITY

357335 In the given potentiometer circuit length of the wire \(AB\) is 3 \(m\) and resistance is \(R = 4.5\Omega \). The length \(AC\) for no deflection in galvanometer is:
supporting img

1 \(1.8\,m\)
2 Dependent on \(r\)
3 \(2\,m\)
4 None of these
PHXII03:CURRENT ELECTRICITY

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 \(mA\)):

1 \(2\)
2 \(1\)
3 \(10\)
4 \(6\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII03:CURRENT ELECTRICITY

357333 Two cells of emf’s approximately 5\(V\) and 10\(V\) are accurately compared using a potentiometer of length 400 \(cm\).

1 Potentiometer is usually used for comparing resistances and not voltages
2 The battery of potentiometer can have a voltage of 15\(V\) and resistance of the wire is adjusted so that the potential drop across the wire slightly exceeds 10\(V\)
3 The battery that runs the potentiometer should have voltage of 8\(V\)
4 The first portion of 50 \(cm\) of wire itself should have a potential drop of 10\(V\)
PHXII03:CURRENT ELECTRICITY

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 :
supporting img

1 \(1.5\;V\)
2 \(0.67\;V\)
3 \(3.0\;V\)
4 \(1.33\;V\)
PHXII03:CURRENT ELECTRICITY

357335 In the given potentiometer circuit length of the wire \(AB\) is 3 \(m\) and resistance is \(R = 4.5\Omega \). The length \(AC\) for no deflection in galvanometer is:
supporting img

1 \(1.8\,m\)
2 Dependent on \(r\)
3 \(2\,m\)
4 None of these
PHXII03:CURRENT ELECTRICITY

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 \(mA\)):

1 \(2\)
2 \(1\)
3 \(10\)
4 \(6\)
PHXII03:CURRENT ELECTRICITY

357333 Two cells of emf’s approximately 5\(V\) and 10\(V\) are accurately compared using a potentiometer of length 400 \(cm\).

1 Potentiometer is usually used for comparing resistances and not voltages
2 The battery of potentiometer can have a voltage of 15\(V\) and resistance of the wire is adjusted so that the potential drop across the wire slightly exceeds 10\(V\)
3 The battery that runs the potentiometer should have voltage of 8\(V\)
4 The first portion of 50 \(cm\) of wire itself should have a potential drop of 10\(V\)
PHXII03:CURRENT ELECTRICITY

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 :
supporting img

1 \(1.5\;V\)
2 \(0.67\;V\)
3 \(3.0\;V\)
4 \(1.33\;V\)
PHXII03:CURRENT ELECTRICITY

357335 In the given potentiometer circuit length of the wire \(AB\) is 3 \(m\) and resistance is \(R = 4.5\Omega \). The length \(AC\) for no deflection in galvanometer is:
supporting img

1 \(1.8\,m\)
2 Dependent on \(r\)
3 \(2\,m\)
4 None of these
PHXII03:CURRENT ELECTRICITY

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 \(mA\)):

1 \(2\)
2 \(1\)
3 \(10\)
4 \(6\)
PHXII03:CURRENT ELECTRICITY

357333 Two cells of emf’s approximately 5\(V\) and 10\(V\) are accurately compared using a potentiometer of length 400 \(cm\).

1 Potentiometer is usually used for comparing resistances and not voltages
2 The battery of potentiometer can have a voltage of 15\(V\) and resistance of the wire is adjusted so that the potential drop across the wire slightly exceeds 10\(V\)
3 The battery that runs the potentiometer should have voltage of 8\(V\)
4 The first portion of 50 \(cm\) of wire itself should have a potential drop of 10\(V\)
PHXII03:CURRENT ELECTRICITY

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 :
supporting img

1 \(1.5\;V\)
2 \(0.67\;V\)
3 \(3.0\;V\)
4 \(1.33\;V\)
PHXII03:CURRENT ELECTRICITY

357335 In the given potentiometer circuit length of the wire \(AB\) is 3 \(m\) and resistance is \(R = 4.5\Omega \). The length \(AC\) for no deflection in galvanometer is:
supporting img

1 \(1.8\,m\)
2 Dependent on \(r\)
3 \(2\,m\)
4 None of these
PHXII03:CURRENT ELECTRICITY

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 \(mA\)):

1 \(2\)
2 \(1\)
3 \(10\)
4 \(6\)