Parallel circuits: worked example 2

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Physics - Parallel circuits: worked example 2

Parallel circuits: worked example 2

The two globes in the previous example are connected in a parallel circuit
to the same supply, as shown. Will they glow brighter or dimmer than
previously?

When the two globes are wired in parallel they will glow considerably
brighter (and the battery will go flat much sooner).

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Module 1: Capacitors

Capacitors

Capacitance

The time constant

Discharging capacitors

Module 2: Circuits

The series circuit

Parallel circuits

Parallel circuits: worked example 1

Parallel circuits: worked example 2

AC circuits

Module 3: Converting AC to DC

Converting AC to DC: half-wave rectification

Converting AC electricity into DC electricity: smoothing

Module 4: Electric systems, circuits

Calculations with series circuits

Series circuit: worked example

Calculations with parallel circuits

Parallel circuit: worked example

Module 5: Exploring sound

Introduction to Sound

Wave nature of sound

Categories of waves

Transverse verses Longitudinal waves

Sound is a longitudinal wave

Creating sound waves

Representing sound waves

Period, frequency and pitch

Representing sound waves with displacement graphs

Module 6: Introduction to electric systems

Current, charge, voltage

Charge in coulombs

Voltage

Resistance

Work done

Power

Module 7: Magnets and magnetism

Magnets and magnetic fields

Magnetic fields

Magnetic field of the earth

Currents and magnetism

Moving charges in magnetic fields

Forces on current-carrying wires

Electric motors

The DC motor and the split-ring commutator

AC motors

Electromagnetic induction

Generators

Module 8: Sound diffraction

Diffraction

The superposition of waves

Diffraction and interference of sound waves from two sources

Module 9: Sound - Standing waves

Standing waves

Standing waves in strings

Standing waves in air columns

Open-end air columns

Closed-end pipes

Module 10: Intensity of sound

Amplitude, loudness and intensity

Intensity versus distance from a source

Intensity and the decibel scale

The response of the ear to different frequencies

Acoustic power

Diffraction

Module 11: Speed of sound

The speed of sound

Worked examples: the speed of sound

Example of the speed of sound

Activity - solid sound-carriers

Module 12: The wave equation

Worked examples: the wave equation

The reflection, transmission and absorption of sound

Module 13: Transducers

Transducers: light-dependent resistors, LDRs

Transducers: worked examples

Transducers: thermistors

Tranducers: light-emitting diodes, LEDs

Worked example: LEDs

Module 14: Assessment