P. Science Exam

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 formula to calculate voltage in a circuit?

Back

Voltage (V) can be calculated using the formula V = I × R, where I is the current in amperes and R is the resistance in ohms.

Front

What happens to the pitch of a sound as the source approaches?

Back

As the source of sound approaches, the pitch increases because the sound waves are compressed, leading to a higher frequency.

Front

What is thermal conduction?

Back

Thermal conduction is the process by which heat energy is transferred through collisions between neighboring atoms or molecules.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is a temporary magnet?

Back

A temporary magnet is a material that behaves like a magnet only when an external magnetic field is applied and loses its magnetism when the field is removed.

Front

What is the relationship between frequency and wavelength in sound?

Back

Frequency and wavelength are inversely related; as the frequency of a sound wave increases, its wavelength decreases.

Front

What is the definition of a base in chemistry?

Back

A base is a substance that can accept hydrogen ions (H+) or donate electron pairs in a chemical reaction, typically having a pH greater than 7.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the role of a battery in a circuit?

Back

A battery provides the electrical energy needed to drive the current through the circuit.