Friday 16 April 2021

PHYSICS-CH-12 ELECTRICITY

 


Q. no.


Q1.

What is meant by saying that potential difference between two points is 1 Volt. Name a device that helps to measure the potential difference across a conductor?



Q2.

Name an instrument that measures electric current in a circuit. Define the unit of electric current.



Q.3

Give 2 points of difference in Voltmeter and Ammeter.



Q.4

What is electric current? What is the conventional direction of electric current? Why was this direction taken to represent the flow of electric current?



Q. 5

State the relationship between 1 ampere and 1 Coulomb.



Q.6

Why don’t birds sitting on live wire get electric shock?



Q. 7

Draw the symbols of the following electrical components:

A wire joint, Ammeter



Q. 8

What is the charge on an electron?



Q. 9

How many electrons make one Coulomb?





Q.10

A charge of 150 coulomb flows through a wire in one minute. Find the electric current flowing through it.



Q. 11

Choose  the correct option:

To make an uncharged object which have a negative charge, we must :



  1. add some atoms.



  1. remove some atoms



  1. add some electrons



  1. remove some electrons.




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