In the experimental verification of Ohm's law, the ammeter is connected in series mainly because it must measure
Athe potential difference across the resistor
Bthe current through the same conductor
Cthe resistance of the battery directly
Dthe temperature of the wire
Answer & Solution
Correct answer: B. the current through the same conductor
An ammeter measures current and must therefore be placed in series so that the same current flowing through the conductor also flows through the ammeter. A voltmeter, not an ammeter, measures potential difference.
Related questions
For a battery of emf ε and internal resistance r driving current I through external resistA galvanometer of resistance G is converted into a voltmeter reading full-scale voltage V A galvanometer of resistance G shows full-scale deflection at current I_g. To convert it iThe relation between current density j, drift velocity v_d, number density n and charge e A wire has a resistance R. It is stretched uniformly so that its length becomes 2L. The neKirchhoff current law at a junction is a statement ofTwo cells of emf ε and internal resistance r each are connected in parallel. The equivalenA potentiometer of length L is used to compare emfs. If the balance lengths for cells of e