Q81. The symbol of electrical charge is represented by the symbol _______.

Q82. An electric iron is based upon _________.

Q83. Heat can travel from one end to another in a copper rod due to____________.

Q84. 15 N force is applied on an object having weight of 3 kg. How much acceleration will be produced in it?

Q85. The charge on proton is_______.

Q86. Direction of frictional force is in the_____________ direction of motion of body.

Q87. Relation between Kelvin scale and Celsius scale of temperature:
\(T_K=T_C\:+\)_________.
Where,
\(T_K=\) Temperature on Kelvin scale
\(T_C=\) Temperature on Celsius scale

Q88. An electric iron is the application of ______.

Q89. Find the force between \(2\:C\) and \(1\:C\) separated by a distance \(1\:m\) in air.

Q90. If a charge on the body is \(2\:nC\), then how many electrons are present on the body