Question

Q.4 Read the following and answer the questions:The rate of flow of charge is called current. The SI unit of electric current is ampere(A). The direction of flow of current is always opposite to the direction of the flow of electrons. The electric potential is defined as the amount of work done in moving a unit positive charge from infinity to a point in the electric field. The amount of work done in moving a unit positive charge from one point to other in the electric field is called potential difference.The SI unit of electric potential difference and electric potential is volt. A) If 2 coulomb of charge is flowing through a conductor in 100 milli second then what is the amount of current flowing through the conductor *
2 points
a) 20 ampere
b) 2 ampere
c) 0.2 ampere
d) 0.002 ampere​

Answer 1

Answer:

(a) Electric current is the flow of electric charge (electrons) in a conductor such as a metal wire.

SI unit of electric current is ampere.

(b) The current flown when one coulomb charge flows for one second is 1ampere.

(c) An ammeter is used to measure electric current . It should be connected in series with the circuit.

(d)Conventional direction of flow of electric current is from positive terminal of a battery to the negative terminal , through the outer circuit. The direction of flow of electrons is opposite to the direction of conventional current i.e., from negative terminal to positive terminal.

(e) Q=10C,t=0.01s

I=

t

Q

=

0.01

10

=1000A

p.d.=

Q

W

W=p.d.×Q=10×10

6

×10=100×10

6

=100MJ

Energy = work done = 100MJ

Explanation:

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