Question

A Magnetic Force Experiment setup A rectangular wire loop is connected across a power supply with an emf of 20 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to "ZERO" before turning ON the power supply. When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown. 1. The resistance of the wire according to Ohm’s Law is: ______ ?? 2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule) Various rectangular loops of wire with same total length (0.8m) were constructed such that the lengths of the horizontal segments (L) of the wire loops varied between 0.02 m and 0.10 m. The horizontal segment of each loop was always centered between the poles, and the current in each loop was always 4.0 A. The force reading of the balance changed every time the length of the wire was changed, and the power supply was turned on. The difference in reading is only due to the magnetic force on the wire. At equilibrium: ? F? = 0 ? Fdown = Fup;

          A Magnetic Force Experiment setup
A rectangular wire loop is connected across a power supply with an emf of 20 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to "ZERO" before turning ON the power supply.
When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown.
1. The resistance of the wire according to Ohm’s Law is: ______ ??
2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule)
Various rectangular loops of wire with same total length (0.8m) were constructed such that the lengths of the horizontal segments (L) of the wire loops varied between 0.02 m and 0.10 m. The horizontal segment of each loop was always centered between the poles, and the current in each loop was always 4.0 A. The force reading of the balance changed every time the length of the wire was changed, and the power supply was turned on. The difference in reading is only due to the magnetic force on the wire. At equilibrium:
? F? = 0 ? Fdown = Fup;

A Magnetic Force Experiment setup
A rectangular wire loop is connected across a power supply with an emf of 20 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to "ZERO" before turning ON the power supply.
When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown.
1. The resistance of the wire according to Ohm’s Law is: ??
2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule)
Various rectangular loops of wire with same total length (0.8m) were constructed such that the lengths of the horizontal segments (L) of the wire loops varied between 0.02 m and 0.10 m. The horizontal segment of each loop was always centered between the poles, and the current in each loop was always 4.0 A. The force reading of the balance changed every time the length of the wire was changed, and the power supply was turned on. The difference in reading is only due to the magnetic force on the wire. At equilibrium:
? F? = 0 ? Fdown = Fup;

Added by Alex C.

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