Question

a total electricity flow of 5amps was passes through a metallic conductor for a time period of of 30 sec. calculate the total charge flow and the approximate number of electrons passed through the conductor. consider that 1 Coulomb charge contained in nearly 6 × 10^18 electrons.

Answer 1

Given :

Current flow = 5A

Time interval = 30s

To Find :

Total charge flow and the approximate number of electron passed through the conductor.

Solution :

❒ Current flow is defined as the rate of charge flow in conductor per unit time$.$

Mathematically, I = Q / t

Where,

>> I denotes current

>> Q denotes charge

>> t denotes time

• It is a scalar quantity having only magnitude.
• It can't be negative.
• SI unit : A (ampere)

By substituting the given values;

➠ I = Q / t

➠ 5 = Q / 30

➠ Q = 30 × 5

➠ Q = 150 C

❒ Number of electrons passed :

As per law of quantization, Q = n × e

• Q denotes charge
• n denotes number of electron
• e denotes charge of one electron

➠ Q = n × e

➠ 150 = n × (1.6 × 10‾¹⁹)

➠ n = (150/1.6) × 10¹⁹

➠ n = 9.38 × 10²⁰