Physics Summative Test - Term 3, 2024

Questions and Answers

Which of the following is a correct unit of voltage?

Ohms

Watts

Amperes

Volts (correct)

Sound travels faster in air than in water.

False

What is the relationship between current, voltage, and resistance according to Ohm's Law?

Current = Voltage / Resistance

The angle of incidence is equal to the angle of __________.

reflection Signup and view all the answers

Match the following terms with their definitions:

Conduction = Heat transfer through direct contact Convection = Heat transfer through fluid motion Radiation = Heat transfer through electromagnetic waves Refraction = Bending of light as it passes between mediums Signup and view all the answers

Which device is used to measure resistance?

Ohmmeter Signup and view all the answers

Higher frequency sounds have a lower pitch.

False Signup and view all the answers

Define energy transformation in the context of a light bulb.

Electrical energy is transformed into light and heat energy. Signup and view all the answers

The speed of sound is affected by the type of __________ through which it travels.

medium Signup and view all the answers

Study Notes

Test Overview

Hard copy of the test provided on Wednesday of week 8.
Duration of the test is 75 minutes.
Total marks available: 50.
Test format includes 16 multiple choice questions (MCQ), short answers totaling 23 marks, practical design questions worth 7 marks, and a 4-mark section on Science as a Human Endeavour (SHE).

Key Concepts in Physics

Circuits and Electricity:
- Understand definitions of circuits and electricity.
- Knowledge of conduction, convection, and radiation is essential.
Circuit Structure:
- Familiarity with circuit diagrams and symbols for components:
  - Switch
  - Bulb
  - Battery
  - Resistor
  - Ammeter
  - Voltmeter
Electrical Quantities:
- Grasp relationships between current, voltage, and resistance.
- Ability to perform calculations associated with electric circuits.

Sound Fundamentals

Sound Properties:
- Frequency: number of waves passing a point per second.
- Amplitude: height of the wave, related to loudness.
- Wavelength: distance between consecutive wave peaks.
- Pitch: perception of sound frequency.
- Decibels (dB): unit measuring sound intensity.
Sound Transmission:
- Knowledge on how sound travels through different media, explaining variations in speed.

Light Principles

Light Behavior:
- Concepts of incident ray, reflected ray, angle of incidence, and angle of reflection.
- Understanding reflection and absorption in mirrors and other surfaces.
Refraction:
- Knowledge about how light bends when passing through different media.
Energy Transformation:
- Example: Electrical energy converts to light and heat in lamps.

Wave and Particle Behavior

Wave Characteristics:
- Understanding both sound waves and water waves in terms of their behavior.

Scientific Practices

Experimental Design:
- Identify independent, dependent, and controlled variables in scientific experiments.
- Ability to formulate a hypothesis based on variable relationships.
Science as a Human Endeavour (SHE):
- Discuss applications and limitations of science in societal contexts.

Practical Circuit Connections

Understand how simple bulb and battery connections work, including troubleshooting non-functional circuits.

Description

Prepare for the upcoming Physics Summative Test covering essential concepts such as circuits, electricity, and energy transfer mechanisms. The quiz will include multiple-choice questions, short answer queries, practical design tasks, and SHE. Ensure you are well-versed with diagrams and key definitions to excel.