QUIZZ 2

Which of the following is not an electronic device?

• Mobile Phone

• Magnifying Glass

• Computer

• Keyboard

Which of the following is not a physical component of an electronic circuit?

• Capacitor

• Inductor

• Diode

• Temperature

Which of the following is not a property of semiconductors used in electronic devices?

• They excite Electrons

• They don't emit light

• They have high thermal conductivity

• They have variable electrical conductivity

What is the effect of temperature on the recombination rate of electrons in electronic circuits?

• Recombination rate increases with increase in the temperature

• Recombination rate decreases with increase in the temperature

• Recombination rate is independent of temperature

• Recombination of electrons doesn’t occur in semiconductors

Which of the following is correct about photo diode electronic devices?

• P-N junction is connected in reverse bias.
  

• Electron-hole pairs are generated by impurity injection in depletion layer

• It is a photovoltaic cell

• No external voltage is applied

A bar magnet is divided in two pieces. Which of the following statements is true?

• The bar magnet is demagnetized.

• The magnetic field of each separated piece becomes stronger.

• The magnetic poles are separated.

• Two new bar magnets are created.

A bar Magnet is a

• permanent magnet
• Iron fillings

• north pole

• strongest

Which of the following substance is not magnetic?

• iron

• cobalt

• nickel

• copper

The smallest particle of an element is known as an:

• Proton

• Electron

• Neutron

• Atom

How can you make a magnet temporarily lose its magnetism?

• a) By heating it

• b) By blowing on it

• c) By hitting it very bad

• d) Both a) and c)