If potential gradient of a wire decreases, then its length
A potentiometer wire 10m long has a resistance of 40Omega . It is connected in series with a resistances box and a 2 v storage cell. If the potential gradient along the wire is 0.01(V)/(m) the resistance unplugged in the box is
A battery of emf 26V and internal resistance 0.4 ohm is connected to a resistance of 10ohm and a potentiometer wire of length 10m. What is the potential gradient on the wire if the resistance of the potentiometer wire is 5 ohm –
In the following circuit reading of voltmeter V is
In the experiment of calibration of voltmeter, a standard cell of emf 11 V is balanced against 440 cm of potentiometer wire. The potentail difference across the ends of a resistance is found to balance aginst 220 cm of the wire. The corresponding reading of the voltmeter is 0.5 V . Find theerror in the reading of voltmeter.
If reading of voltmeter V_(1) is 40 V, what is the reading of voltmeter V_(2) ?
In an experiment of calibartion of voltmeter, a standard cell of emf 1.1 V is balanced against 440 cm of potentiometer wire. The potentilal difference across the ends of a resistance is found to balance against 220 cm of the wire. The corresponding reading of voltmeter is 0.5 volt. Find the error in the reading of voltmeter.
A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is
