In Volta's cell, what is the direction of the flow of electrons?
From positive electrode to negattve electrode
From negative electrode to positive electrode
From copper plate to zinc plate
In direction of conventional current
What can be the difference between the specific resistance for a thin and thick wire made of the same material ?
In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a $12\, V$ battery will be
What will happen to the resistance of the circuit, if the current through it is doubled ?
What is electrical resistivity? In a series electrical circuit comprising a resistor made up of a metallic wire, the ammeter reads $5\, A$. The reading of the ammeter decreases to half when the length of the wire is doubled. Why?
Mention one reason why tungsten is used for making filament of electric lamp.