10th U2 02 Electric Current

Electric Current

Electric current is the flow of electrical charges per unit time or ...
Electric current is the rate of flow of electrical charges. ​

Categorize

Options (7)

I

q

Q

amperes

A

coulombs

C

Symbols and units

Symbol for Current

Symbol for charges

Unit for current

Unit for charges

Is the property of matter that explains the electromagnetic force.
symbol: q or Q
unit: coulombs (C)

​Electric charges

​Electric current

Understand the difference

Match

Match the following

• Charge

• n

• e

• Total Charge =

• Unit of Charge

Q

particles

1.6x10^-19C

n • e

C

• Q

• particles

• 1.6x10^-19C

• n • e

• C

Examples:
4.8µC = 4.8x10^-6C​
1.9ms = 1.9x10^-3s

​Metric multipliers

Q=2.5 mC
t= 0.38 s

​

Find the current:

Find the current:

Formulae

​Metric multipliers

​e = 1.6 x 10^-19 C

Multiple Choice

(Calculator is required)

Find the scientific notation of 8.2 mA

• 8.2x10^-3A

• 8.2x10³A

• 8.2x10^-6A

• 8.2x10⁶A

Formulae

​Metric multipliers

​e = 1.6 x 10^-19 C

Multiple Choice

(Calculator is required)

Find the total charge of 2.5 kilo electrons

• 2.5x10³(1.6x10^-19)

• 2.5x10³ / 1.6x10^-19

• 1.6x10^-19 / 2.5x10³

• 2.5x10^-3(1.6x10^-19)

Multiple Choice

(Calculator is required)

Find the current in a flow of 5.2µC in 3.8ms

• 1.3x10^-3A

• 1.4x10^-3A

• 1.9x10^-8A

• 2.0x10^-8A

Find the current in a flow of 5.2µC in 3.8ms​
Solution

Formulae

​Metric multipliers

​e = 1.6 x 10^-19 C

Multiple Choice

(Calculator is required)

Find the total charge if there is 3.7A passing in 6.9 ms

• 2.5x10^-2C

• 530 C

• 2.6x10^-2C

• 540 C

Find the total charge if there is 3.7A passing in 6.9 ms​
Solution

Categorize

Options (7)

I

q

Q

amperes

A

coulombs

C

Symbols and units

Symbol for Current

Symbol for charges

Unit for current

Unit for charges

Match

Match the following

• Current

• Charge

• Unit for current

• Unit for charge

• elementary charge

I

Q

A

C

1.6x10^-19C

• I

• Q

• A

• C

• 1.6x10^-19C