Question

8. A thin slice of silicon that contains many solid-state components is a(n)

Answer 1

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