Semiconductors, diodes and transistors

Question 1 of 10

A transistor has three terminals called

Question 2 of 10

Distinguish between n-type and p-type semiconductors, explaining how each is made and what its majority carriers are.

Question 3 of 10

Explain how a transistor can be used as a switch to turn on a lamp automatically when it gets dark.

Question 4 of 10

A semiconductor is a material whose conductivity is

Question 5 of 10

Holes behave as positive charge carriers.

Question 6 of 10

Which logic gate inverts its input?

Question 7 of 10

Draw the symbols and truth tables for the AND, OR and NOT gates. Give one practical use of a logic circuit.

Question 8 of 10

A diode is used in rectification to

Question 9 of 10

The current gain β of a transistor is

Question 10 of 10

A light-dependent resistor (LDR) has a resistance that