2nd Six Weeks Assessment

People might use a lamp to help them see, but in many cases the bulb gets quite warm. The two forms of energy being produced by the lamp are -

• light and thermal 
• light and mechanical 
• thermal and mechanical 
• mechanical and electrical 

What is needed in order for a bulb to light?

• a conductor of electricity 
• made of plastic or wood
• at room temperature 
• an electrical insulator 

All of the following produce thermal energy EXCEPT- 

• oven
• candle
• telephone
• hot plate 

If we attached a buzzer to a battery with a switch, which would lead to the buzzer making noise?

• removing the battery
• adding more wire
• using a bigger buzzer
• closing the switch 

Which two form of energy does the Earth receive directly from the Sun?

• light and sound
• light and thermal
• electrical and light
• mechanical and thermal 

Which of the following materials is used to cover electrical wires for safety because it is an insulator of electric energy?

• copper
• aluminum
• iron
• rubber 

Which form of energy is transmitted by vibrations in the air?

• electrical
• thermal
• sound 
• heat 

Electricity will flow in an electric circuit only if the circuit-

• has several batteries
• makes a complete path
• produces light energy
• has the right kind of insulators 

Which form of energy does a bow and arrow demonstrate?

• electrical
• thermal
• mechanical
• sound 

Which of the following devices requires electrical energy to produce light and sound energy?

• bicycle
• television
• air conditioner
• drum