Question

1. How many electrons will flow for charge of 4C?

2. What are conductors and insulators give examples of each.


3. Define Electric current and electric potential.

4. What are conventional current and electronic current, draw a circuit diagram and represent.

5. Define 1V


6. An electric bulb draws a current of 0.25 A for 20 minutes. Calculate the amount of electric charge that flows through the circuit.


7. A radio set draws a current of 0.36 A for 15 minutes. Calculate the amount of electric charge that flows through the circuit.



8. A charge of 8860 C flows through an electric circuit in 2 min and 40 s. Calculate the magnitude of current in circuit.


9. A charge of 5000C flows through an electric circuit in 2min. and 40s. Calculate the magnitude of current in circuit.



10. A charge of 5000 C flows through electric circuit in 2.5 hours. Calculate the magnitude of current flowing through the circuit.

Answer 1

1) 2.5×10^19 electrons.

2) Conductors are those materials which let the flow of electrons through them and insulators are those which does not let electrons flow through them.

3) Electric current is the ratio of Charge flowing per unit time. Electric potential is a term which shows how much force is applied by an electron to move itself in presence of electric field.

4) Conventional current is the current which flows in opposite direction of the flow of electrons. electronic current is a current which flows in the same direction of elecrrons. For diagram consult google baba.

5) 1V is the potential required by a charge of 1C to move a distance of 1 unit.

6)

$charge = current \times time$

current is 0.25 A and time is in seconds which is 1200 seconds

charge is 0.25×1200= 300 C.

7) By the same relation above charge is 324 C.

8)

$current = \frac{charge}{time}$

charge is 8860 and time is 160 seconds

so current drawn is 55.375 A.

9) By same relation as above the current drawn is 31.25 A.

10) By same relation as above the current is 0.6 A.