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High voltage refers to the amount of electrical potential energy in a system, while high current refers to the flow of electrical charge. High voltage can cause electrical breakdown and insulation failure, leading to equipment damage and safety hazards. Safety measures for high voltage include insulation, grounding, and protective gear. High current can cause overheating, equipment damage, and electrical fires. Safety measures for high current include proper circuit protection, current limiting devices, and regular maintenance checks.

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4mo ago

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What is the physical quantity measured by an voltmeter?

An ammeter measures the amount of current flowing through an electrical circuit. It measures amperage.


What are the key differences between DC and AC current, and how do these differences impact their applications in various electrical systems?

Direct current (DC) flows in one direction continuously, while alternating current (AC) changes direction periodically. DC is commonly used in batteries and electronic devices, while AC is used in power grids and household appliances. The differences in current types impact their efficiency, transmission, and safety in different electrical systems.


What unit measures resistance to electrical current?

Unit measure for resistence is called as "OHM". Its law is called as "OHM'S LAW".


What is a voltmeter and what does it measure?

A voltmeter is a device used to measure the electrical potential difference between two points in a circuit. It measures voltage, which is the force that pushes electric current through a circuit.


What are the key differences between AC and DC current, and how do these differences impact the efficiency of electrical systems?

AC (alternating current) and DC (direct current) differ in the direction of flow and voltage fluctuation. AC changes direction periodically, while DC flows in one direction. AC is more efficient for long-distance transmission due to lower energy loss, but DC is better for certain devices like electronics. The choice between AC and DC depends on the specific application and efficiency requirements of the electrical system.