Integrated Science

Question 1

1Which material conducts electricity?

Easy

A. wood B. plastic C. rubber D. copper

Question 2

2Which component lets current flow in one direction only?

Easy

A. resistor B. capacitor C. diode D. switch

Question 3

3A switch in a circuit is used to

Easy

A. measure current B. open or close the circuit C. store charge D. increase voltage

Question 4

4A capacitor in a circuit

Easy

A. creates sound B. produces light C. stores electric charge D. reduces resistance always

Question 5

5A resistor in a circuit is used to

Easy

A. produce light B. limit current C. increase voltage D. store charge

Question 6

6In a circuit diagram, a long and short pair of parallel lines represents

Easy

A. a switch B. a resistor C. a cell D. a lamp

Question 7

7In a circuit, a resistor is used to

Easy

A. limit the current B. produce light C. switch the circuit off D. store charge

Question 8

8An LED with a forward voltage of 2 V is connected to a 9 V battery. To limit current to 20 mA, the series resistor should be

Hard

A. 100 Ω B. 350 Ω C. 7 Ω D. 450 Ω

Question 9

9LED stands for

Easy

A. low-energy device B. long electron diode C. light electric detector D. light-emitting diode

Question 10

10Silicon and germanium are examples of

Easy

A. magnets B. insulators C. semiconductors D. conductors