Back to CURRENT ELECTRICITY
JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
1 of 1
Application
+4 | -1
A potentiometer wire is supplied a constant voltage of . A cell of emf is balanced by the voltage drop across 216 con of the wire. Find the total length of the potentiometer wire.
View answer and explanation
Correct option: A
Option A () is correct because the total length of the potentiometer wire is calculated using the principle of potential gradient and balancing length.
More Questions from CURRENT ELECTRICITY
Practice All Chapter MCQs →
The specific resistance of a wire is , its volume is and its resistance is , then its length will be
Magnitude of drift velocity per unit electric field is
Statement-1: If a resistor is connected to a battery the current decreases when the temperature increases.
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is