physics question

Question

Use these numbers: the length of the bar is 40.0 cm; the battery voltage is 9.00 V; the resistance of the bar is 5.00 Ω, and the strength of the magnetic field is B = 0.300 T. Determine the magnitude and direction of the net current in the circuit a long time after the switch is closed. By "a long time," we mean that enough time has passed for the bar to reach a terminal (constant) velocity.

_______ A

Answer 1

The magnitude and direction of the net current in the circuit a long time after the switch is closed can be determined using the following equation

I = V / R

where I is the magnitude of the current, V is the battery voltage, and R is the resistance of the bar. Substituting the given values, we get

I = 9.00 V / 5.00 Ω = 1.80 A

The direction of the current is determined by the battery. In this case, the battery voltage is 9.00 V, which means that the current flows from the positive terminal to the negative terminal.

Therefore, the magnitude of the net current in the circuit is 1.80 A and the current flows from the positive terminal to the negative terminal. Note that this calculation does not take into account the force exerted on the magnet by the metal plate, as the question is asking for the magnitude and direction of the net current in the circuit. The force exerted on the magnet by the metal plate is a separate concept that is typically studied in the context of physics, and it is not directly related to the current in the circuit.