O Level Science Notes Archives - Page 33 of 33 - Free ZIMSEC & Cambridge Revision Notes

Fuel efficiency
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Fuel efficiency

Notes, O Level Science Notes, Ordinary Level Notes

Fuel efficiency

By garikaib|2025-02-12T09:11:15+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Fuel efficiency

Fuel efficiency measures the amount of energy that can be obtained from a given quantity of fuel
It is often useful to know which fuel gives the most energy(heat) per given unit
In a laboratory fuel efficiency can be determined by measuring the temperature rise of water when it is […]

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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|2025-02-12T09:25:59+02:00February 12th, 2025|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|2025-02-12T09:41:23+02:00February 12th, 2025|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|2025-02-12T09:06:51+02:00February 12th, 2025|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|2025-02-12T09:21:53+02:00February 12th, 2025|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