Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Maharashtra Board-2018

SI unit of potential gradient is ____.

Explain with a neat circuit diagram how will you determine unknown resistance ‘X’ by using a meter bridge.

When a resistor of 5 Ω 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 of the same potentiometer wire. Find the balancing length when the cell is in open circuit and the internal resistance of the cell.

Two resistances $\mathrm{X}$ and $\mathrm{Y}$ in teh two gaps of a meter-bridge gives a null point dividing the wire in the ratio $2:3$. If each resistance is increased by $30 \mathrm{\Omega }$, the null point divides the wire in the ratio $5:6$, calculate the value of $\mathrm{X}$ and $\mathrm{Y}$.