Advertisements
Advertisements
Question
AB is a potentiometer wire (Figure). If the value of R is increased, in which direction will the balance point J shift?
Solution
If R is increased, the current through the wire will decrease and hence the potential gradient will also decrease, which will result in increase in balance length. So J will shift towards B.
APPEARS IN
RELATED QUESTIONS
(i) State the principle on which a potentiometer works. How can a given potentiometer be made more sensitive?
State the principle of a potentiometer. Define potential gradient. Obtain an expression for potential gradient in terms of resistivity of the potentiometer wire.
When a resistor of 5Ω is connected across the cell, its terminal potential difference is balanced by 150 cm of potentiometer wire and when a resistance of 10 Ω is connected across the cell, the terminal potential difference is balanced by 175 cm same potentiometer wire. Find the balancing length when the cell is in open circuit and the internal resistance of the cell.
Would you prefer a voltmeter or a potentiometer to measure the emf of a battery?
The net resistance of an ammeter should be small to ensure that _______________ .
State the uses of a potentiometer.
In a potentiometer experiment, when the galvanometer shows no deflection, then no current flows through ____________.
In the experiment of potentiometer, at balance point, there is no current in the ______.
Three resistance each of 4Ω are connected to from a triangle. The resistance b / w two terminal is
Three identical cells each of emf 'e' are connected in parallel to form a battery. What is the emf of the battery?
