357324 A potentiometer wire is 100 \(cm\) long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 \(cm\) and 10 \(cm\) from the positive end of the wire in the two cases. The ratio of emf’s is:-

357325 Assertion :
A potentiometer of longer length is used for accurate measurement.
Reason :
The potential gradient for a potentiometer of longer length with a given source of e.m.f becomes small.

357326 A potentiometer is used for the comparison of emf of two cells \(E_{1}\) and \(E_{2}\). For cell \(E_{1}\), the no deflection point is obtained at \(20\;cm\) and for \(E_{2}\), the no deflection point is obtained at \(30\;cm\). The ratio of their emfs will be

357327 In a potentiometer, the null point is received at \({7^{th}}\) wire. If we have to change the null point at the \({9^{th}}\) wire, what should we do?

357324 A potentiometer wire is 100 \(cm\) long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 \(cm\) and 10 \(cm\) from the positive end of the wire in the two cases. The ratio of emf’s is:-

357325 Assertion :
A potentiometer of longer length is used for accurate measurement.
Reason :
The potential gradient for a potentiometer of longer length with a given source of e.m.f becomes small.

357326 A potentiometer is used for the comparison of emf of two cells \(E_{1}\) and \(E_{2}\). For cell \(E_{1}\), the no deflection point is obtained at \(20\;cm\) and for \(E_{2}\), the no deflection point is obtained at \(30\;cm\). The ratio of their emfs will be

357327 In a potentiometer, the null point is received at \({7^{th}}\) wire. If we have to change the null point at the \({9^{th}}\) wire, what should we do?

357324 A potentiometer wire is 100 \(cm\) long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 \(cm\) and 10 \(cm\) from the positive end of the wire in the two cases. The ratio of emf’s is:-

357325 Assertion :
A potentiometer of longer length is used for accurate measurement.
Reason :
The potential gradient for a potentiometer of longer length with a given source of e.m.f becomes small.

357326 A potentiometer is used for the comparison of emf of two cells \(E_{1}\) and \(E_{2}\). For cell \(E_{1}\), the no deflection point is obtained at \(20\;cm\) and for \(E_{2}\), the no deflection point is obtained at \(30\;cm\). The ratio of their emfs will be

357327 In a potentiometer, the null point is received at \({7^{th}}\) wire. If we have to change the null point at the \({9^{th}}\) wire, what should we do?

357324 A potentiometer wire is 100 \(cm\) long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 \(cm\) and 10 \(cm\) from the positive end of the wire in the two cases. The ratio of emf’s is:-

357325 Assertion :
A potentiometer of longer length is used for accurate measurement.
Reason :
The potential gradient for a potentiometer of longer length with a given source of e.m.f becomes small.

357326 A potentiometer is used for the comparison of emf of two cells \(E_{1}\) and \(E_{2}\). For cell \(E_{1}\), the no deflection point is obtained at \(20\;cm\) and for \(E_{2}\), the no deflection point is obtained at \(30\;cm\). The ratio of their emfs will be

357327 In a potentiometer, the null point is received at \({7^{th}}\) wire. If we have to change the null point at the \({9^{th}}\) wire, what should we do?