Post Test (2) Physical Science

Front

What is Voltage?

Back

Voltage is the electric potential difference between two points in a circuit, measured in volts (V). It is the force that pushes electric charges through a conductor.

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 is expressed as V = I × R.

Front

What happens to the current in a circuit if the resistance increases while the voltage remains constant?

Back

If the resistance increases while the voltage remains constant, the current decreases according to Ohm's Law.

Front

What is a series circuit?

Back

A series circuit is a type of electrical 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 type of electrical circuit in which the components are connected across common points or junctions, allowing multiple paths for the current to flow.

Front

What is the relationship between wave frequency and wave energy?

Back

As wave frequency increases, wave energy also increases. Higher frequency waves carry more energy.

Front

What is the unit of resistance?

Back

The unit of resistance is the ohm (Ω).

Front

What is the effect of a burned-out light bulb in a series circuit?

Back

If a light bulb burns out in a series circuit, the circuit is broken, and all the bulbs will go out.

Front

What is the effect of a burned-out light bulb in a parallel circuit?

Back

If a light bulb burns out in a parallel circuit, the other bulbs will continue to operate normally.

Front

What is sound wave frequency?

Back

Sound wave frequency is the number of wave crests that pass a given point in one second, measured in hertz (Hz).