A constant current flows through a Helmholtz coil. A loop of wire initially to the left of the Helmholtz coil moves to the right. The plane of the loop is perpendicular to the magnetic field. As the loop moves into the region within the Helmholtz coil, an emf is induced in the loop. The loop is connected to a voltmeter that measures the induced emf. Is the reading on the voltmeter directly proportional to the current flowing through the Helmholtz coil?