Answer:
Self-operated instruments are tools or devices that are manually operated by the user. They are powered by the user's own physical movement or energy, such as turning a hand crank or pushing a lever. Examples of self-operated instruments include hand-crank drills, hand-held saws, and manual lawn mowers.
Power-operated instruments, on the other hand, are tools or devices that are powered by an external source, such as electricity or gasoline. They are operated by turning on a switch or pressing a button, and the power source does the work. Examples of power-operated instruments include electric drills, power saws, and gas-powered lawn mowers.
One major difference between self-operated and power-operated instruments is the amount of effort required to use them. Self-operated instruments require more physical exertion from the user, while power-operated instruments require less. Additionally, power-operated instruments may be more efficient and able to complete tasks more quickly than self-operated instruments. However, power-operated instruments often require more maintenance and may be more expensive to purchase and operate
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