Power & fuses

Electric current is measured in

• kWh

• Amps

• Ohms

• Watts

Electric power is measured in

• kWh

• Amps

• Ohms

• Watts

The rate at which electric energy is used is called

• Electric energy

• Electric power

• Voltage difference

• Electric current

Power is defined as voltage times amperage. The equations is ___.

• P=I x V
• V+ P = I
• I x P = V

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter

Tags

NGSS.HS-PS2-5

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter

What is the power of a resistor which has 10A flowing through it and a voltage of 50V

• 500W

• 5W

• 0.2W

• 5000W

How many amps would a vacuum cleaner need to draw from a 240 V power source if it was rated for

1600 W?

• 6.67A

• 6.66A

• 384,000A

• 0.15A

How many watts would a cell phone charger be rated for if it was supplying 0.5 A at 5 V?

• 2.5W

• 10W

• 0.1W

• 0.15W

This is the circuit symbol of a

• resistor

• battery

• fuse

• switch

• an earth wire