Electrical power & circuits

Electrical power can be calculated using

• Resistance x Voltage
• Voltage x Current 
• Voltage ÷ Current

Tags

NGSS.HS-PS3-5

Watts is the same as...

• Joules per second
• Voltage per second
• Current per second

The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?

• 170 W
• 170 A
• 1.7 V
• 1.7 W

Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
 
Remember: V=IR and P=VI

• 80 W
• 200 W
• 2.5 A
• 22.5 KJ

What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?
Remember: I = P/V

• 4.55 A
• 28800 J or 28.8 KJ
• 80 W
• 200 W

If an oven has a power of 2000 W and the voltage is 230 V what fuse is required?

• 3A
• 5A
• 13A

Which of these best completes the circuit?

• rubber band
• metal nail
• leather shoelace
• wooden toothpick

Electrical lights will not come on unless their electrical circuit is a --

• parallel circuit
• series circuit
• closed circuit
• short circuit

A class prepared some electrical circuits using battery, connecting wires, and three light bulbs.  Which of these circuits can make the three bulbs light?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-3

Which of these substances conducts electricity the best?

• wood
• brick
• copper
• plastic

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-6