Systems power

Technology

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10 questions

Rebecca Crook

•about 5 years ago

Question 1

Multiple Choice

10 points

Calculate the power of the 3 V torch bulb with an operating current of 0.5 A.

A.15W

B.1.5 W

C.0.16 W

D.6 W

Question 2

Numerical Answer

10 points

What is the current through a 12 ohm resistive circuit when 24V is applied? The answer is in amps (no units needed)

Question 3

Numerical Answer

10 points

Tommy runs his juicer every morning. The juicer uses 90 W of Power and the current supplied is 4.5 A. How many volts are necessary to run the juicer? answer is in V

Question 4

Multiple Choice

10 points

A DC electric motor transforms 1.50 kW of electrical power into mechanical form. If the motor's operating voltage is 300 volts, how much current does it "draw" when operating at full load (full power output)?

A.5A

B.0.2 A

C.150 A

D.30 A

Question 5

Multiple Choice

10 points

A transformer is connected to 120 volts. Find the current if the resistance is 480-ohms?

A.250mA

B.250 A

C.25A

D.25mA

Question 6

Short Answer

10 points

Question 7

Multiple Choice

10 points

The unit for power is

A.Watts

B.Ohms

C.Amps

D.Volts

Question 8

Short Answer

10 points

What are the colours of the 4 band resistor of 530 ohms with 5% tolerance

Question 9

Numerical Answer

10 points

6 milliamps is converted to ___ amps

Question 10

Short Answer

10 points

What is the formula for ohms law?