Post Test (2) Physical Science

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as V = I × R.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).

Front

What happens to current if voltage is doubled while resistance remains constant?

Back

The current will also double.

Front

What is a series circuit?

Back

A series circuit is a circuit in which the components are connected end-to-end, so that the current flows through each component in turn.

Front

What is a parallel circuit?

Back

A parallel circuit is a circuit in which the components are connected across common points or junctions, allowing current to flow through multiple paths.

Front

What is wave frequency?

Back

Wave frequency is the number of cycles of a wave that occur in a unit of time, typically measured in Hertz (Hz).

Front

How does increasing wave frequency affect wave energy?

Back

Increasing wave frequency increases wave energy.

Front

What is the difference between mechanical waves and electromagnetic waves?

Back

Mechanical waves require a medium (like air or water) to travel through, while electromagnetic waves can travel through a vacuum.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s).

Front

What is the relationship between voltage, current, and resistance in a circuit?

Back

The relationship is defined by Ohm's Law: V = I × R, where V is voltage, I is current, and R is resistance.