Ordinary rubber is an insulator, but the special rubber that is tyres of air crafts are made slightly conducting. Why is this necessary?

What do fuel cells, batteries and solar cells have in common?

1. They all produce electricity
2. They are used to create magnetic field
3. They are all cheap in price
4. They all can be used to power automobiles

When a glass rod is rubbed with silk:

1. Negative charge is produced on silk, but no charge is produced on the glass rod.
2. Equal but opposite charges are produced on both the materials.
3. Equal and similar charges are produced on both the materials.
4. Positive charge is produced on the glass rod  but no charge is produced on the silk.

Which of these is used for the separation of charges to generate electricity?

Which of these is used for the separation of charges to generate electricity?

What process happens in solar cell?

1. Process of creating photons from voltage
2. Process of converting kinetic energy into electricity
3. Process of creating light from electricity
4. Process of converting sunlight into electricity

Magnetism produces electricity in:

1. Generators
2. Incubators
3. Manipulators
4. Piezoelectric crystals

What is the one possible reason that "Conservation of electricity is a good idea".

1. It is often produced by nonrenewable source of energy.
2. Limited amount of power supply is given to each household.
3. Using too much electricity can cause fire.
4. Using too much electricity can cause transformers to break down.

How does a generator create current?

1. By using a magnet.
2. By using a fan.
3. By using energy from the sun.
4. By using heat from the oil.

Piezoelectric effect is when materials produce electric charges when:

1. Voltage is applied
2. Mechanical stress is applied
3. Electric field is applied
4. Magnetic field is applied

An object becomes negatively charged by:

1. Losing electrons
2. Gaining electrons
3. Losing protons
4. Gaining protons

Old turntables and record players used which electrical source to make music? Hint: the needle used to be a crystal.

1. Thermoelectric
2. Piezoelectric
3. Magnetomotive 
4. Chemical reaction

The piezoelectric materials used for converting energy are called_______.

1. Transition devices.
2. Converter.
3. Dielectric.
4. transducer.

If you join two different metals together and then heat the junction, it produces electricity. This is called_____.

1. Thermoelectric effect.
2. Piezoelectric effect.
3. Magnetomotive effect.
4. Chemical action.

If you squish a crystal, it vibrates and produces tiny electrical charges. This is called__________.

1. Piezoelectric effect.
2. Magnetomotive effect.
3. Thermoelectric effect.
4. Inappropriate information.

Find the odd one out: