A constantan wire, X, has a length of 4.0 m and a diameter of 2.0 mm.
A second constantan wire, Y, has a length of 2.0 m and a diameter of 1.0 mm.
Which statement correctly compares the resistance of Y with that of X?
The resistance of Y is one-half the resistance of X.
The resistance of Y is the same as the resistance of X.
The resistance of Y is twice the resistance of X.
The resistance of Y is four times the resistance of X.
132 exam-style questions on CIE IGCSE Physics 4.2.4a Resistance. Each one has a worked solution and a mark scheme showing where the marks go.