The magnetic force that Earth exerts on a compass needle is less than the force that the compass needle exerts on Earth.   A. True B. False

Which of the following is a false statement about the force that a magnetic field exerts on a  moving, charged object?             a) The force is perpendicular to the direction of the magnetic field lines. b) The force causes the object to accelerate. c) The force is always directed parallel to the object's velocity.   d) The magnitude of the force depends on the object's charge.

| Scientists in a laboratory onboard a zero-gravity spaceship setup and measure electric and magnetic fields in an experiment chamber. The scientists measure the magnetic field to point in the positive x-direction given by B = B,î. The scientists then measure the net force acting on a charged particle q moving through this chamber. The net force is measured to be F = -F,î + F2j. The particle is moving along the positive z-axis with a velocity given by i = v,k. What are the x and y components of the electric field as measured by the scientists? Express your answers in terms of q, vo, Ba, F1, and F2, as needed.

Consider a magnetic force acting on an electric charge in a uniform magnetic field.  Which of the following statements are true? a) A magnetic force is exerted on a stationary electric charge in a uniform magnetic field. b) The direction of the magnetic force acting on a moving charge in a magnetic field is perpendicular to the direction of the magnetic field. c) A magnetic force is exerted on an electric charge moving through a uniform magnetic field. d) An electric charge moving parallel to a magnetic field experiences a magnetic force. e) The direction of the magnetic force acting on a moving electric charge in a magnetic field is perpendicular to the direction of motion. f) An electric charge moving perpendicular to a magnetic field experiences a magnetic force.