Physical Science Q4 Vocabulary Test

What is an electromagnet?

• A permanent magnet

• A combination of a strong magnet and an electrified wire coil

• A device that measures electric current

• A material that does not conduct electricity

What is biomass energy?

• Energy from the sun

• Chemical potential energy obtained from renewable organic materials

• Energy from wind

• Energy from water

What is a simple machine that consists of a plane with opposite ends at different heights?

• Lever

• Pulley

• Inclined plane

• Wedge

What is the act of providing a path for electrical charge to move into the earth called?

• Insulating

• Grounding

• Charging

• Conducting

What is the definition of direct current?

• Electric current in which electric charges move in only one direction

• The movement of electric charge through a complete loop

• A three-dimensional region around a charged object

• The field force between two charged objects

What is the principle of electromagnetic induction?

• The entire range of all electromagnetic waves

• The principle that voltage is produced in a conductor whenever the conductor and a magnetic field are changed in relation to each other

• The properties of magnets and magnetic fields

• The amount by which a simple machine multiplies an input force

What is the definition of "actual mechanical advantage"?

• The mechanical advantage that accounts for all mechanical losses sustained through using a machine

• The ratio of output force to input force in a machine

• The efficiency of a machine in converting energy

• The speed at which a machine operates

What is a magnetic domain?

• One of the two regions of concentrated magnetic fields in a magnet

• A group of atoms whose individual magnetic fields are aligned

• The properties of magnets and magnetic fields

• A wave from the upper end of the radio wave band

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

• To store electrical energy

• To increase or decrease the voltage of an AC current

• To convert AC to DC

• To generate electrical energy

What is the range of wavelengths for X-rays?

• 10 pm to 10 nm

• 100pm to 100 nm

• 1pm to 1 nm

• 50pm to 50 nm