Integrated Science

Question 1

1The most commonly used semiconductor material is

Easy

A. rubber B. iron C. silicon D. copper

Question 2

2Adding impurities to a semiconductor to change its conductivity is

Easy

A. rectifying B. doping C. insulating D. charging

Question 3

3Adding small amounts of impurities to a semiconductor to change its conductivity is called

Easy

A. plating B. doping C. annealing D. galvanising

Question 4

4A transistor can be used as

Easy

A. a switch or an amplifier B. a battery C. a resistor only D. a fuse

Question 5

5A p-n junction diode conducts when the

Hard

A. p-side is connected to the positive terminal B. n-side is positive C. junction is cold D. circuit is open

Question 6

6A light-dependent resistor (LDR) has a resistance that

Easy

A. falls as light gets brighter B. rises as light gets brighter C. never changes D. depends only on temperature