Physics Assesment

What is the principle behind electromagnetic induction?

• A constant magnetic field generates an electric current in a conductor.

• Magnetic fields do not affect electric currents in any way.

• Electric current can only be produced by direct contact with a power source.

• Changing magnetic field induces an electric current in a conductor.

Which of the following is a unit of magnetic flux?

• Ampere

• Weber

• Tesla

• Henry

What is the relationship between frequency and wavelength in electromagnetic waves?

• Frequency and wavelength are directly related in electromagnetic waves.

• Frequency and wavelength are inversely related in electromagnetic waves.

• Wavelength has no effect on frequency in electromagnetic waves.

• Increasing frequency results in longer wavelength.

In space physics, what is the primary force acting on a satellite in orbit?

• Magnetism

• Electromagnetic force

• Friction

• Gravity

What is the main component of an atom that determines its chemical properties?

• Protons

• Neutrons

• Electrons

• Nuclei

Which particle has a negative charge?

• Electron

• Neutron

• Photon

• Proton

A man puts some ice into a glass of water on a warm day.

After a short time, he notices that the ice disappears and that water droplets appear on the outside of the glass.
Which two changes of state are taking place?

• A condensation and freezing

• B condensation and melting

• C boiling and melting

• D freezing and evaporation

What phenomenon occurs when light passes through a prism?

• Reflection

• Refraction

• Diffraction

• Dispersion

What is the role of a transformer in an electrical circuit?

• The role of a transformer in an electrical circuit is to change voltage levels.

• To convert AC to DC voltage.

• To increase current levels in a circuit.

• To store electrical energy for later use.

What is the effect of increasing the temperature on the resistance of a conductor?

• Resistance decreases with increasing temperature.

• Resistance increases with increasing temperature.

• Resistance remains constant regardless of temperature changes.

• Resistance fluctuates randomly with temperature changes.