What type of current is used in household supply?

What type of current is given by a cell?

What type of dynamo is used in industry?

What type of reflector is used in a box-type solar cooker ?

What type of toilets are used in aeroplanes?

What type of dynamo is used in a bicycle?

(i) What type of drug is used in sleeping pills? (ii) What type of detergents are used in toothpastes? (iii) Why the use of alitame as artificial sweetener is not recommended?

(a) What is the difference between alternating current and direct current ? (b) What type of current is given by (i) a dry cell, and (ii) a Power House generator ?

What type of a propellant was used in Russian rockets such as proton?

What is a household industry?