ENG4232

Atom is the smallest unit of mass and it contains:

• Electrons, protons, neutrons

• Protons and neutrons

• Electrons and neutrons

• Protons and electrons

Select the correct statement.

• Inside the atom, protons have negative charge, electrons have positive charge and neutrons have no charge on them

• Inside the atom, protons have +ve charge, electrons have no charge and neutrons have -ve charge on them

• Inside the atom, protons have -ve charge, electrons have no charge and neutrons have +ve charge on them

  
  

• Inside the atom, protons have positive charge, electrons have negative charge and neutrons have no charge on them

Insulators easily conduct electricity whereas conductors and semi-conductors do not

• Conductors easily conduct electricity, insulators do not, whereas semi-conductors may be doped to conduct electricity

• Conductors and insulators easily conduct electricity whereas semi-conductors do not

• Semi-conductors easily conduct electricity whereas conductors and insulators do not

• none of the choices

Good insulators include:

• Glass, air and paper

• Glass, copper and metals

• Glass, air and metals

• Copper, air and paper

Which one is the correct statement?

• A DC source has L and N wires while an AC source has positive and negative polarities of wires

• A DC source of voltage has +ve and -ve polarities of wires while an AC source of voltage has live and neutral wires

• A DC source of voltage has live and neutral wires whereas an AC source has +ve and -ve polarities of wires

• A DC source of voltage has brown and blue wires whereas an AC source of voltage has red and black wires

The correct statement is:

• A generator is not a source of voltage and has no polarities.

• A generator, solar cell and battery are sources of voltage and have their polarities.

• A generator and a resistor are sources of voltage with +ve and -ve polarities.

• A solar cell and a resistor are sources of voltage with live and neutral polarities.

Find out the correct statement.

• An integrated circuit can also be called a microchip and is basically a collection of some discrete circuits on a small chip that is made of a semiconductor material like silicon.

• An integrated circuit cannot be called a microchip and is basically a collection of some discrete circuits on a small chip that is made of a semiconductor material like silicon.

• An integrated circuit can also be called a microchip and is basically a collection of some discrete circuits on a large chip that is made of a semiconductor material like silicon.

• An integrated circuit can also be called a microchip and is basically a collection of some discrete circuits on a small chip that is made of a semiconductor material like copper.

What is capacitance?

• It's the ability to store an electric charge in electrostatic field.

• It's the ability to store an electric voltage

• It's the ability to store an electric current.

• It's the ability to store an electric field.

The unit of capacitance is called:

• Henry

• Coulomb

• Ohm

• Farad

The schematic symbol shown represents;

• Inductor

• Capacitor

• Battery

• Resistor