true or false??plz expalin..tnx 1) In the metal wires of a circuit, the electron
ID: 1950704 • Letter: T
Question
true or false??plz expalin..tnx1) In the metal wires of a circuit, the electron current i flows from the negative to the positive end of a battery, but the current I flows from the positive to the negative end of the battery.
2) If there is an electric field inside of a conductor, then current must be flowing through this conductor.
3) If you double the diameter of a cylindrical wire, you double its conductivity but reduce its resistivity by one half.
4) If a one-amp current is flowing in a wire, one electron per second flows through this wire
Explanation / Answer
a) True; Electrons flow from -ve terminal to +ve terminal of battery due to force of attraction. And conventionally current is shown to flow from +ve to -ve terminal of battery.
b) False: We know that electric field is generated due to presence of charges.it's not necessary that current to be flowing through conductor.
c) False; resitivity and conductivity are fundamental properties of an element, They don't change with diamtere of wire.
d) False : 1 A of current is contributed by 6 x 1018 electrons per second
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