IB IB Physics 2

Question 1

What type of wave is sound classified as in IB Physics?

Accepted Answer

Longitudinal

Answer

Sound is a longitudinal wave in which particle displacement is parallel to the direction of wave propagation, creating compressions and rarefactions.

Question 2

Which equation correctly relates frequency (f) and period (T)?

Accepted Answer

f = 1/T

Answer

Frequency and period are reciprocals: f = 1/T, meaning a wave with a 2-second period has a frequency of 0.5 Hz.

Question 3

What is the speed of light in a vacuum, as listed in the IB Physics data booklet?

Accepted Answer

3.0 × 10⁸ m/s

Answer

The speed of light in a vacuum is c = 3.0 × 10⁸ m/s, a fundamental constant used throughout IB Physics.

Question 4

What does Ohm's Law state about the relationship between voltage (V), current (I), and resistance (R)?

Accepted Answer

V = IR

Answer

Ohm's Law states V = IR, meaning the voltage across a conductor equals the current through it multiplied by its resistance.

Question 5

What is the SI unit of electrical resistance?

Accepted Answer

Ohm

Answer

The ohm (Ω) is the SI unit of electrical resistance, defined as the resistance when one volt produces one ampere of current.

IB - International Baccalaureate Practice Test