Sustainable Future, Energy, Power

The resistance of a few metres of wire conductor in closed electrical circuit is

• Practical zero

• Low

• Very high

• high

Ohm's law is not applicable to

• Carbon resistors

• Circuit with low current densities

• Vacuum tubes

• High voltage circuits

A closed switch has a resistance of

• Zero

• About 50 ohms

• About 500 ohms

• Infinity

What resistors type is found in SIPs and DIPs?

• Metal oxide

• Thick Film

• Metal film

• Wire wound

The six basic form of energy are

• Electrical, mechanical, light, heat, magnetic and chemical

• Potential, sun, light,chemical, electrical and mechanical

• Electrical, mechanical, sun, heat chemical and hight

• Light, sun, magnetic, chemical, electrical and mechanical

Power is defined as

• Watts

• Energy

• The rate of which energy is used

• The rate at which energy is generated

Power is measured in units of

• Joules*voltage

• Joules*charge

• Joules/work

• Joules/time

Tags

NGSS.MS-PS3-5

What quantities do you need to calculate energy

• Current and voltage

• Power and time

• Resistance and current

• Power and voltage

What is the electrical energy of a 70w TV that is used for 110hr

• 7.7kwh

• 0.63kwh

• 7700kwh

• 1.57kwB

Tags

NGSS.HS-PS3-1

Large capacity generator are invariably

• Water cooled

• Natural air cooled

• Forced air cooled

• Hydrogen cooled

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4