Question 1 Write the full form of LED? Question 2 Name a device which glows even when a weak electric current passes through it? Question 3 What is it advantage of using LED in testing the electrical conductivity of liquids? Question 4 Which effect of electric current is utilised for detecting the flow of current through a solution: (a) When a torch bulb is … [Read more...] about Detection of Weak Current Flowing through Liquid
Class 8
Test for Conduction of Liquid
Question 1 Describe an activity to show that hydrochloric acid solution conduct electricity? Question 2 Vinegar is a sour liquid. State whether vinegar conduct electricity or not? Question 3 Describe an activity to show that sugar solution do not conduct electricity? Question 4 How will you show that alcohol does not conduct electricity? Take a small beaker. … [Read more...] about Test for Conduction of Liquid
Liquids Conduct Electricity
Question 1 What are good conductors of electricity? Give example? Question 2 What are bad conductors of electricity? Give example? Question 3 Do liquids conduct electricity? Question 4 What are electrolytes? Question 5 What are strong electrolytes. Give example? Question 6 What are weak electrolyte. Give example? Question 7 What is an electrode? Question 8 … [Read more...] about Liquids Conduct Electricity
Noise Pollution
Question 1 What are causes of noise pollution? Question 2 What is the difference between noise and music? Question 3 What is partial hearing. What are the usual cause of noise pollution? Question 4 What is meant by noise pollution? Question 5 Explain how noise pollution is harmful to human beings? Question 6 State the various measures which can be taken to … [Read more...] about Noise Pollution
Musical Instruments
Question 1 Name the substance which vibrate in a flute to produce sound? Question 2 Name 4 types of musical instruments? Question 3 Give example of stringed musical instruments? Question 4 Give example of wind musical instruments? Question 5 Give example of membrane musical instruments? Question 6 Give example of plate type musical instruments? Question 7 Name … [Read more...] about Musical Instruments