Physics Flashcard: Energy and Circuits

Front

What is the term used to describe the ability to maintain ecological balance by avoiding depletion of natural resources?

Back

Sustainability

Answer explanation

The term 'sustainability' refers to the ability to maintain ecological balance by using resources responsibly, ensuring they are not depleted for future generations. This makes it the correct choice.

Front

Which of the following is a measure of the flow of electric charge in a circuit? Voltage, Resistance, Current, Component

Back

Current

Answer explanation

Current is the measure of the flow of electric charge in a circuit, representing the rate at which charge passes a point. Voltage measures potential difference, and resistance measures opposition to current flow.

Front

What is the unit of electrical resistance?

Back

Ohm

Answer explanation

The unit of electrical resistance is the Ohm, which measures how much a material opposes the flow of electric current. Volt measures electric potential, Ampere measures current, and Watt measures power.

Front

In a series circuit, how is the total resistance calculated?

Back

By adding all resistances

Answer explanation

In a series circuit, the total resistance is calculated by adding all resistances together. This means you simply sum the values of each resistor in the circuit, making the correct choice 'By adding all resistances'.

Front

Which type of circuit has multiple paths for electricity to flow?

Back

Parallel Circuit

Answer explanation

A parallel circuit has multiple paths for electricity to flow, allowing current to take different routes. In contrast, a series circuit has only one path, making the parallel circuit the correct choice.

Front

What is the term for energy sources that cannot be replenished in a short period of time?

Back

Finite (Non-renewable)

Answer explanation

The term for energy sources that cannot be replenished in a short period of time is 'Finite (Non-renewable)'. These sources, like fossil fuels, take millions of years to form and are limited in availability.

Front

Which of the following is an example of a renewable energy source? Coal, Oil, Solar, Natural Gas

Back

Solar

Answer explanation

Solar energy is a renewable source because it is derived from the sun, which is abundant and inexhaustible. In contrast, coal, oil, and natural gas are fossil fuels that deplete over time.

Front

What is the term for the phenomenon where gases trap heat in the Earth's atmosphere?

Back

Greenhouse Effect

Answer explanation

The term for the phenomenon where gases trap heat in the Earth's atmosphere is the 'Greenhouse Effect'. This effect is crucial for maintaining the planet's temperature and supporting life.

Front

What is the principle that states energy cannot be created or destroyed, only transformed?

Back

Conservation of Energy

Answer explanation

The principle that states energy cannot be created or destroyed, only transformed, is known as the Conservation of Energy. This fundamental concept underlies many scientific principles and processes.

Front

Which of the following is a measure of how much useful energy is converted from a given energy input? Voltage, Efficiency, Current, Resistance

Back

Efficiency

Answer explanation

Efficiency measures how much useful energy is converted from a given energy input. It is a key concept in energy conversion, unlike voltage, current, and resistance, which relate to electrical properties.