A student records the following data for a constantan wire: Trial 1: Current = ,…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

A student records the following data for a constantan wire: Trial 1: Current =

0.30\,\text{A}

, Potential difference =

1.2\,\text{V}

Trial 2: Current =

0.50\,\text{A}

, Potential difference = ____ V Assuming the wire obeys Ohm’s law and its resistance remains unchanged, choose the correct value that should fill the blank in Trial 2. (a)

1.5\,\text{V}

(b)

1.8\,\text{V}

(c)

2.0\,\text{V}

(d)

2.5\,\text{V}

Related theory

Ohm's Law
Ohm's Law (Macroscopic)
Ohm's law, V-I graphs and ohmic/non-ohmic conductors
Current Electricity
Ohm's law and V-I graphs
Electricity
Electric Circuits

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