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Gr 9 NATURAL SCIENCES: CH 3.5 SUM Safety with Electricity

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89 Questions

Why are parallel circuits commonly used in homes?

Because they allow multiple devices and lights to operate independently

What happens when you connect too many devices in a parallel circuit?

The circuit becomes overloaded and poses a risk of electrical fires

What is the purpose of earthing in electrical appliances?

To prevent electric shocks

What color is the earth wire in a washing machine?

Green/Yellow

What happens when a live wire touches the metal casing of an appliance?

The current flows through the earth wire to the ground

What is a short circuit?

An unintended low-resistance path in a circuit

What is the function of a fuse?

To melt and break the circuit when current exceeds a safe level

What happens when a circuit breaker detects a surge in current?

It automatically breaks the circuit

Why is it important to manage the load on each circuit?

To prevent overloading and electrical fires

What is the primary function of Earth Leakage Circuit Breakers?

To detect any leakage of current to the earth wire and shut off power

What is the main motivation behind illegal connections for some individuals?

To gain financial profit by supplying electricity to others

What is a consequence of illegal connections?

Service disruptions and frequent outages

What is a safety hazard posed by illegal connections?

Fire risk due to poorly made connections

What is a solution to addressing illegal connections?

Implementing programs to extend legal electricity access to underserved areas

What is the primary purpose of Lightning Rods?

To safely channel lightning strikes away from buildings

Why do some areas resort to illegal connections?

Due to lack of access to legal electricity

What is a consequence of electricity theft for utility companies?

Reduced investment in infrastructure improvements

What is a risk associated with illegal connections?

Fire risk due to overheating

What is a benefit of promoting legal connections?

Reduced risk of electrocution and fires

What is the primary advantage of using parallel circuits in homes?

They allow multiple devices to operate independently.

What is the consequence of overloading a parallel circuit?

It can cause excessive heat build-up, potentially leading to electrical fires.

What is the purpose of the earth wire in a washing machine?

It connects the metal casing to the ground.

What happens when a live wire accidentally touches the metal casing of an appliance?

The current will flow through the earth wire to the ground.

What is the primary function of a circuit breaker?

To automatically break the circuit when a surge is detected.

What is the consequence of a short circuit?

It can damage appliances and cause overheating.

What is the primary function of a fuse?

To melt and break the circuit when current exceeds a safe level.

Why is it important to manage the load on each circuit?

To prevent overloading and potential electrical fires.

What is the benefit of using parallel circuits in homes?

They allow multiple devices to operate independently and safely.

What is the purpose of earthing in electrical appliances?

To prevent electric shocks by connecting the metal casing to the ground.

What is the main purpose of Earth Leakage Circuit Breakers?

To prevent electrical shocks by detecting current leaks to the earth wire

What is the primary motivation behind illegal connections for some communities?

Due to lack of access to legal electricity

What is the primary risk associated with illegal connections?

Fire hazards and electrocution

What is the primary advantage of promoting legal connections?

Provides a safer and more reliable electricity supply

What is the primary purpose of Lightning Rods?

To divert lightning strikes away from buildings

What is a consequence of electricity theft for utility companies?

Higher electricity bills for legitimate consumers

What is the primary benefit of extending legal access to electricity?

Increased access to electricity for underserved areas

What is a consequence of service disruptions caused by illegal connections?

Economic losses for businesses and communities

What is a solution to addressing illegal connections?

Strengthening regulations and enforcement

What is the primary benefit of analyzing the dangers of illegal connections?

Identifying solutions to address illegal connections

What happens to the resistance in a parallel circuit when more devices are added?

The overall resistance remains the same

What is the main reason why parallel circuits are commonly used in homes?

They allow multiple devices to operate independently

What is the primary function of the earth wire in a washing machine?

Connects the metal casing to the ground

What is the consequence of overloading a parallel circuit?

It causes excessive heat build-up, potentially leading to electrical fires

What is the primary function of a fuse in a circuit?

To break the circuit when the current exceeds a safe level

What happens when a short circuit occurs in a circuit?

A surge in current occurs, potentially damaging appliances

What is the primary function of a circuit breaker in a circuit?

To automatically break the circuit when a surge is detected

Why is earthing important in electrical appliances?

It prevents electric shocks if a live wire touches the metal casing

What is the primary benefit of using parallel circuits in homes?

They allow multiple devices to operate independently

What is the consequence of not managing the load on each circuit?

The circuit becomes more prone to overloading and electrical fires

What is a primary function of Earth Leakage Circuit Breakers in homes?

To detect any leakage of current to the earth wire and immediately shut off the power

What is a common motivation behind illegal electricity connections in areas with no legal access?

To access a necessary utility that is not available

What is a consequence of illegal connections on the power grid?

Overloading and frequent outages, affecting the entire community

What is a primary benefit of promoting legal connections and extending access to electricity?

Improved safety and reduced risk of electrical fires and electrocutions

What is the primary function of Lightning Rods?

To safely channel lightning strikes away from buildings

What is a consequence of electricity theft for utility companies?

Reduced investment in infrastructure improvements

What is a primary risk associated with illegal connections?

Both fire risk and electrocution risk

What is a solution to addressing illegal connections?

All of the above

What is a primary benefit of analyzing the dangers of illegal connections?

Improving the overall safety and stability of the electricity supply

What is a common characteristic of illegal connections?

Exposed wires and insecure connections

What is the primary mechanism that prevents electric shocks in a parallel circuit?

The earth wire connecting the metal casing to the ground

What is the primary concern when connecting multiple devices in a parallel circuit?

The total current drawn by each device

What is the primary function of a fuse in a circuit?

To melt and break the circuit when current exceeds a safe level

What is the primary consequence of a short circuit?

A surge in current, potentially damaging appliances and causing overheating

What is the primary advantage of using parallel circuits in homes?

They provide a practical and convenient way to manage electricity in a home, with devices operating independently

What is the primary risk associated with illegal connections in terms of human safety?

Electrocution and fire hazards

What is the primary benefit of promoting legal access to electricity?

Improving the overall stability of the electricity supply

What is the primary function of Lightning Rods in terms of lightning protection?

To channel lightning strikes away from buildings

What is the primary consequence of electricity theft for utility companies?

Reduced investment in infrastructure improvements

What is the primary advantage of analyzing the dangers of illegal connections?

Increasing awareness about the risks of electrical fires

What is the primary function of Earth Leakage Circuit Breakers?

To detect any leakage of current to the earth wire and shut off the power

What is a common consequence of illegal connections?

Frequent outages and disruptions in the power grid

Why do some individuals or communities resort to illegal connections?

To avoid paying for electricity

What is the primary purpose of Lightning Rods?

To safely channel lightning strikes away from buildings

What is a potential solution to addressing illegal connections?

Promoting programs to help communities gain legal access to electricity

What is the primary advantage of using parallel circuits in homes?

Allowing multiple devices to operate independently

What is the primary function of the earth wire in a washing machine?

To prevent electric shocks

What happens when a live wire accidentally touches the metal casing of an appliance?

The current flows through the earth wire to the ground

What is the primary function of a fuse in a circuit?

To break the circuit when current exceeds a safe level

What is the consequence of overloading a parallel circuit?

Excessive heat build-up, potentially leading to electrical fires

What happens when a Lightning Rod is struck by lightning?

It safely channels the lightning strike away from buildings.

Why do some individuals opt for illegal electricity connections?

All of the above.

What is a consequence of electricity theft for utility companies?

They incur higher costs for legitimate consumers and potential investment reductions in infrastructure improvements.

What is a safety hazard posed by illegal connections?

All of the above.

What is the primary function of Earth Leakage Circuit Breakers?

To detect any leakage of current to the earth wire and immediately shut off the power to prevent electric shocks.

What is the main advantage of using parallel circuits in homes?

They provide a practical and convenient way to manage electricity

What happens when a live wire accidentally touches the metal casing of an appliance?

The current flows through the earth wire to the ground

What is the purpose of a fuse in a circuit?

To melt and break the circuit when current exceeds a safe level

What is the consequence of overloading a parallel circuit?

Excessive heat build-up, potentially leading to electrical fires

What is the function of a circuit breaker?

To automatically break the circuit when a surge is detected

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