2.2 GCSE DT Exploring Energy Storage Concepts

Which of the following is a type of energy storage?

• Solar panels

• Flywheel

• Wind turbine

• Hydroelectric dam

Answer explanation

A flywheel is a type of energy storage that uses rotational energy to store and release energy. In contrast, solar panels, wind turbines, and hydroelectric dams are energy generation technologies, not storage systems.

What is the primary function of a battery?

• To generate energy

• To store energy

• To convert energy into light

• To dissipate energy

Answer explanation

The primary function of a battery is to store energy for later use. While it can generate energy through chemical reactions, its main role is to hold energy until needed, making 'to store energy' the correct choice.

Which material is commonly used in lithium-ion batteries?

• Copper

• Aluminium

• Graphite

• Iron

Answer explanation

Graphite is commonly used as the anode material in lithium-ion batteries due to its excellent conductivity and ability to intercalate lithium ions, making it essential for battery performance.

What type of energy is stored in a compressed spring?

• Kinetic energy

• Chemical energy

• Potential energy

• Thermal energy

Answer explanation

A compressed spring stores energy due to its position. This energy is called potential energy, as it has the potential to do work when released. Kinetic energy, chemical energy, and thermal energy are not applicable in this context.

Which of the following is an example of chemical energy storage?

• A moving car

• A charged battery

• A stretched rubber band

• A flowing river

Answer explanation

A charged battery stores chemical energy, which can be converted into electrical energy when needed. In contrast, a moving car, stretched rubber band, and flowing river represent kinetic or potential energy, not chemical energy.

What is the unit of energy commonly used in the context of batteries?

• Joules

• Watts

• Volts

• Ampere-hours

Answer explanation

The unit of energy commonly used in the context of batteries is ampere-hours (Ah). It measures the total charge capacity of a battery, indicating how much current a battery can provide over a specific time period.

Which of the following is NOT a type of battery?

• Alkaline

• Nickel-cadmium

• Lead-acid

• Solar cell

Answer explanation

A solar cell is not a type of battery; it converts sunlight into electricity. In contrast, alkaline, nickel-cadmium, and lead-acid are all types of batteries that store and provide electrical energy.

What type of energy is associated with the motion of an object?

• Kinetic energy

• Potential energy

• Chemical energy

• Thermal energy

Answer explanation

Kinetic energy is the energy associated with the motion of an object. It depends on the mass and velocity of the object, making it the correct choice for energy related to movement.

Which of the following is a disadvantage of using lead-acid batteries?

• High energy density

• Long lifespan

• Heavy weight

• Low cost

Answer explanation

The heavy weight of lead-acid batteries is a significant disadvantage, making them less portable compared to other battery types. In contrast, high energy density, long lifespan, and low cost are advantages.

What is the main advantage of using lithium-ion batteries in portable devices?

• Low cost

• High energy density

• Heavy weight

• Short lifespan

Answer explanation

The main advantage of lithium-ion batteries in portable devices is their high energy density, allowing them to store more energy in a smaller size, which is crucial for the compact design of these devices.