A-Level Physics Quiz

What causes the induced EMF according to Faraday's law?

• A constant magnetic field

• A moving electric charge

• A change in magnetic flux linkage

• A stationary electric charge

How is gravitational potential defined?

• The work done to move a unit mass from infinity to a point

• The potential energy of a unit mass at a point

• The force exerted by a unit mass at a point

• The energy required to move a unit mass from a point to infinity

Why does an object maintain constant speed during circular motion?

• The force is perpendicular to the displacement

• The net force is zero

• The object is in equilibrium

• The force is parallel to the displacement

What is a key difference between stationary and progressive waves?

• Stationary waves have constant amplitude at all points

• Progressive waves have varying amplitude at all points

• Stationary waves have varying amplitude with position

• Progressive waves have nodes and antinodes

According to Lenz's law, what is the direction of the induced EMF?

• In the direction of the change causing it

• Opposite to the change causing it

• Perpendicular to the change causing it

• Parallel to the magnetic field