One mark Question:
Question 1
Give us the factors on which resistance of the conductors depends
Question 2
Write down the difference between Ammeters and Voltmeters?
Question 3
Why is Tungsten used almost exclusively for filament of electric Lamps?
Question 4
What is the difference between Open circuits and closed circuits?
Question 5
Why do we use copper wire as connecting wires in the circuit?
Question 6
What does an electric circuit mean?
Question 7
Define the unit of electric current.
Question 8
What determines the rate at which energy is delivered by a current?
Question 9
What are the advantages of connecting electrical devices in parallel with the battery instead
of connecting them in series?
Question 10
Will current flow more easily a thick wire or a thin wire of the same material, when
connected to the same source? Why?
Answers
Answer:
A.1 Resistance of a conductor is directly proportion to length of conductor and inversely proportion to the area of cross- section and nature of the object, it is given by OHM'S law
A.2 These are devices which calculate electric current and potential difference respectively.
A.3 Tungsten is an alloy which donot get oxidise even at very high temperature and has higher resistance than conductors.
A.4 open circuit in which switch is off and current is not flowing and in closed circuit switch is on and current is flowing.
A.5 Copper and silver both are good conductor of electricity and their is much higher than any other conductor as we cannot afford silver wires , we use copper wire
A.6 It can be define as a close path in which current is flowing or active path way for electons.
A.7 S.I unit of electric current is Ampere. It can be define as flow of charge per unit time.
A.8 It is the power of appliances.
A.9 In parallel circuit we can switch off or on any appliances according to our will while in series if we switch off any of the appliance all other will also be switched on or off.
Any other relevant points.
A.10 Acc. to OHM'S law resistance of electric current is inversely proportional to the area of cross-section of wire. Therefore, current will flow more easily by a thick wire.
Hope this will help :D
Explanation: