Electrical Energy and Power

The work done by the battery is transformed into .......................... in the resistor.

• heat energy

• mechanical enery

• electrical energy

Tags

NGSS.HS-PS3-4

If an electric source is connected to a motor, the electrical energy transforms into ........................ energy.

• heat

• mechanical

• electrical

Tags

NGSS.HS-PS3-3

Electricity meters installed in homes and buildings read __________ directly.

• kilowatt

• watt

• kilowatt hour

In using electricity, 1 kWh is taken as one unit of ____________.

• electrical power

• electrical energy

• electric potential

The electric stove converts the electrical energy into ____________ energy.

• chemical

• heat

• light

Tags

NGSS.HS-PS3-3

The electrical units recorded by the meter show how much ________ is used.

• electrical energy

• electrical power

• electric potential

f one 500 W electric lamp is used for 2 h, the meter shows an increase of ....... units.

• 1

• 0.5

• 2

Tags

NGSS.HS-PS3-1

Electrical power rating of reading lamp

• 750-1000 W

• 1200 W

• 50W

Choose Fuse

• 
• 
• 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

An electric circuit installed in a house contains a 5 A fuse and the voltage is 230 V. Can twenty 50 W electric lamps be used at the same time in that circuit?

• Yes

• No