Physics 9702 · AS & A Level
Magnetic fields due to currents
6 practice questions on Magnetic fields due to currents, with worked solutions and instant marking.
A long straight vertical wire carries a constant current. A Hall probe is located a distance $r$ from the wire centre, as shown in Fig. 5.1.
May/June 2010
State the name of an electrical sensing device that reacts to changes in:
May/June 2010
Define the tesla in terms of magnetic flux density.
May/June 2013
A Hall probe is positioned at a distance $d$ from a long straight wire carrying current, as shown in Fig. 5.1. The direct current in the wire is $4.0\,\text{A}$. Line $XY$ is normal to the wire. The Hall probe is turned about the line $XY$ until the Hall probe reading $V_H$ becomes maximum.
May/June 2014
A long, straight vertical wire carries current $I$. It passes through the horizontal card EFGH, as illustrated in Fig. 8.1 and Fig. 8.2.
Oct/Nov 2019
A long, straight vertical wire carries current $I$, and it passes through a horizontal card EFGH, as shown in Fig. 8.1 and Fig. 8.2.
Oct/Nov 2019