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Ohm’s Law
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Ohm’s Law

Notes, O Level Science Notes, Ordinary Level Notes

Ohm’s Law

By garikaib|2022-09-15T12:38:47+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Experiment: Ohm’s Law

It gives the relationship between potential difference and current through a wire in a circuit
According to the law:
\text{potential difference}\propto\text{current}
The current passing through a wire is proportional to the potential difference across its ends
Provided the temperature remains constant
An equation can thus be formed:
constant\dfrac{\text{potential difference(V)}}{\text{current […]

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The Ampere-Hour
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The Ampere-Hour

Notes, O Level Science Notes, Ordinary Level Notes

The Ampere-Hour

By garikaib|2022-09-15T12:38:38+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: The Ampere-Hour

It is used to measure the current capacity of cells and batteries
is the amount of energy charge in a battery/cell that will allow one ampere of current to flow for one hour
It is thus a unit of measuring a cell/battery’s charge
For example if a battery is rated as […]

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Experiment: Demonstrating the effects of short-circuits and overloads

By garikaib|2022-09-15T12:38:29+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Demonstrating how fuses work ZIMSEC O Level Combined Science Notes: Experiment: Demonstrating the effects of short-circuits and overloads

Aim: To demonstrate the effect of a short circuit/overloading of a circuit on a fuse

Materials: 6 or 12 V battery, copper wires, fuse wire/steel wool strand, switch, car headlamp, torch bulb, switch, […]

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Metal and metal alloy properties and their construction uses

By garikaib|2022-09-15T12:38:22+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Metals are popular in construction. Image credit traveldigg.com ZIMSEC O Level Combined Science Notes: Metal and metal alloy properties and their construction uses

Metals are popular construction materials
They have properties that make them suited for making diverse structures
They are ductile which means […]

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Machines: The inclined plane
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Machines: The inclined plane

Notes, O Level Science Notes, Ordinary Level Notes

Machines: The inclined plane

By garikaib|2022-09-15T12:38:15+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Machines: The inclined plane

Is also known as a ramp
is a flat supporting surface tilted at an angle,
with one end higher than the other,
used as an aid for raising or lowering a load
Inclined planes are widely used to move heavy loads over vertical obstacles
examples vary from a […]

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Hydraulic brakes

By garikaib|2022-09-15T12:38:08+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Car brakes. Image driverside.com ZIMSEC O Level Combined Science Notes: Hydraulic brakes

Is another example of hydraulic machines
Pressure is applied on the brake pedal using the car driver’s foot

Car brakes. Image credit dtzone.com […]

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Immunity and Immunisation

By garikaib|2022-09-15T12:37:57+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Sindiso Marume holding her brother’s health card. Image credit irinnews.org ZIMSEC O Level Combined Science Notes: Disease:Immunity and Immunisation

Immunity-is the ability of the body to resist diseases
There are various types of immunity:

Antigen-is any substance that causes […]

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Contraception: Abstinence

By garikaib|2022-09-15T12:37:50+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Couple holding hands. Image credit neguswhoread.com ZIMSEC O Level Combined Science Notes:Contraception: Abstinence

It involves total avoidance of sexual intercourse

Adavantages

Many couples agree to wait until marriage
There is no risk of contracting Sexually Transmitted Infections
It is 100% effective
It is supported by most religious […]

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Abraham Maslow’s Hierarchy of Needs

By garikaib|2022-09-15T12:37:43+02:00January 24th, 2023|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Human beings are social animals. Image credit madamenoire.com ZIMSEC O Level Business Studies Notes: Abraham Maslow’s Hierarchy of Needs

In attempting to explain the concept of motivation Abraham Maslow came up with
The Hierarchy Of Needs

Maslow's hierarchy of [...]
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Non Financial Motivation: Job Enrichment

By garikaib|2022-09-15T12:37:34+02:00January 24th, 2023|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Job enrichment is a non-financial method to motivate workers. Image credit unieducar.org.br ZIMSEC O Level Business Studies Notes: Non Financial Motivation: Job Enrichment

is a management concept that involves redesigning jobs so that they are more challenging to the […]

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January 2023