Power Physics

Moving the car by the diagonal route uses 20 000J and lifting the car vertically uses 24 000J of energy. If both routes take the same time, (10 s) which route uses more power?

• Vertical one less energy is used per second

• Diagonal one as less energy is used per second

• Vertical one as more energy is used per second

• Diagonal one as more energy is used per second

Tags

NGSS.MS-PS3-5

Winnie and Eeyore have the same mass and have just finished climbing the same tree, but Eeyore was 4 seconds faster then Winnie. Who used the most power?

• Winnie as he took the longer time and did the same amount of work as Eeyore

• Winnie as he is shorter and could grip more as so did more work overall

• Eeyore as he did the same amount of work as Winnie but in a shorter time.

• Eeyore as he did more work than Winnie but in a shorter time

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Bulb glows only in

• closed circuit

• open circuit

• in both circuits

• open circuit if bulb is not fused

Filament of a bulb is made up of

• aluminium

• chromium

• platinum

• tungsten

Which of these might spin a generator at a power plant to produce electricity?

• wind

• water

• steam from burning coal

• all of these

Tags

NGSS.MS-PS3-5

To generate electricity we need

• A coil of wire.

• Only magnet.

• A coil of wire and a magnet.

• Rubber.

What is the name of the device that generate electricity

• Generator

• Motor

• Coil

• Magnet

Tags

NGSS.MS-ETS1-1

Materials which allow electric current to pass through them are ___________

• conductors

• Insulators

• None of the above

As water flows through a dam, a generator is turned and creates enough electricity for thousands of homes. This describes...

• biofuels

• hydroelectric energy

• geothermal energy.

• potential energy

One problem with ____ energy is that it produces radioactive waste. 

• nuclear

• solar

• tidal

• geothermal