ES N5 Before exam leave

Question 1

• 34875J

• 37853J

• 34875KJ

• 37853KJ

Question 2. Why would you use a micro controller over a hardwired circuit? more than 1 answer.

• One micro controller code be used in a number of different products.

• Micro controllers are used mainly for aesthetics.

• Easier to develop than a complex electronic circuit.

• Can be manufacture cheaply as fewer components need for complex circuits.

Calculate RA?

• 3.94KN

• 3.94N

• 1.1KN

• 1.1N

Question 4

• 0.39 N/mm²

• 0.39 KN/mm²

• 2.5 N/mm²

• 2.5 KN/mm²

5) A fan motor in a computer is used to stop the hardware from overheating. It has a current of 0.4 A and a voltage of 12 V. When someone was using the computer the fan was on for 1 minute but because of friction and sound energy lost the fan is only 82% efficient. Calculate the energy output.

• 198.4J

• 305.7J

• 236.2J

• 287.2J

Question 6

• 62.67N

• 58.98N

• 39.3N

• 48.76N

Question 7. Ra? Rb?

• Ra= 7029N Rb= 8620N

• Ra= 8620N Rb= 7029N

• Ra= 6749N Rb= 9328N

• Ra= 9328N Rb= 6749N

To make this a dark sensor the LDR would

• go in the R1 position

• go in the R2 position

Calculate the total resistance.

• 100Ω

• 80Ω

• 1KΩ

• 800Ω

what is the boolean?

• (A + B) · C̄ = Z

• (A . B) · C̄ = Z

• (A + B) + C̄ = Z

• (A + B) · C = Z