8. a thin slice of silicon that contains many solid-state components is a(n) a) transistor b) intergratef circuit c) diode d) cathode-ray tube 9. a current of 6.0 amps passed through a motor that has a resistance of 5.0 ohms. clacukate the power a) 30 watts b) 150 watts c) 180 watts d) 900 watts if you have the answers to the electricity and magnetism unit test i'd really appreciate all of them, i have less than an hour to finish this, yikes.

Question 8
Silicon is a semi-conductor that are mostly used in electronic devices. From the choices give, silicon is applicable in transistor, integrated circuit and diode. But the best answer that suits this question is (B) integrated circuit. 

Question 9
Power is the rate of doing work. It is calculated as,

Power = workdone/time taken to do that work.

In electricity, power = current ×voltage
From ohm's law, V=IR
Where I⇒current and 
           R⇒ resistance. 

∴Power = I²R
             = 6²×5
             = 180 Watts