Force Between Two Parallel Currents - The ampere

The video tutorial explores the interaction between current-carrying wires, explaining how they attract or repel each other based on current direction. It delves into Ampere's study of magnetic fields and the forces between conductors, illustrating the calculations involved. The tutorial defines the ampere and coulomb, linking them to current and force. It also introduces Roget's spiral, a device demonstrating the attraction of parallel currents, enhancing understanding of magnetic effects.

What determines whether two current-carrying wires will attract or repel each other?

• The temperature of the environment

• The material of the wires

• The direction of the currents

• The length of the wires

According to Newton's third law, what is the relationship between the forces on two conductors carrying currents?

• The forces are equal and in the same direction

• The forces are unequal and in the same direction

• The forces are equal and opposite

• The forces are unequal and in opposite directions

What happens to the forces between two conductors if the current in one of them is reversed?

• The forces become attractive

• The forces double in magnitude

• The forces remain unchanged

• The forces become repulsive

How is the ampere defined in terms of force between two conductors?

• As the force of 1 joule per meter

• As the force of 1 coulomb per second

• As the force of 1 newton per meter

• As the force of 2 x 10^-7 newtons per meter

What is the definition of a coulomb in terms of current and time?

• The charge that flows in 1 second with a current of 0.5A

• The charge that flows in 2 seconds with a current of 1A

• The charge that flows in 1 second with a current of 1A

• The charge that flows in 1 second with a current of 2A

What principle does Roget's spiral demonstrate?

• Parallel currents repel

• Perpendicular currents attract

• Perpendicular currents repel

• Parallel currents attract

What happens to Roget's spiral when the current is switched on?

• The coil shrinks and the circuit is established

• The coil expands and the circuit is established

• The coil expands and the circuit breaks

• The coil shrinks and the circuit breaks