FRANK Solutions for Class 9 Physics Chapter 8 - Electricity and Magnetism - Current Electricity
Prepare for your exam with Frank Solutions for ICSE Class 9 Physics Chapter 8 Electricity and Magnetism – Current Electricity. Revise concepts including the electric cell, electric current, resistance, rheostat and more, with TopperLearning’s model answers. Learn to write the symbols of battery, ammeter, cell and other components of an electric circuit.
Understand and revise the factors that influence the resistance of a wire by exploring our learning portal’s ICSE Class 9 Physics Frank textbook solutions. For any doubts related to concepts based on electricity, check out our ‘UnDoubt’ platform and get answers from our academic experts.
Chapter 8 - Electricity and Magnetism - Current Electricity 312
(ii) S.I unit of potential difference is volt.
(iii) S.I unit of resistance is ohm.
T = 1s.
I = Q/t = ne/t
So, n = I . t / e = 1 . (1 / 1.6 x 10-19) = 6.25 x 1018 electrons.
Chapter 8 - Electricity and Magnetism - Current Electricity 313
(i)The length of the wire.
(ii)The area of cross-section of the wire.
(iii)The temperature of the wire.
(iv)The material of the wire.
If another bulb is connected in parallel then resistance will decrease.
(i) The length of the wire , resistance is directly proportional to the length of wire.
(ii) The cross-section of the wire , resistance is inversely proportional to the cross-section of the wire.
(iii) The temperature of the wire , resistance of wire is directly proportional to the temperature of the wire.
(iv) The material of the wire (good conductors possess less resistance.)
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