Question

Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k ohms of resistance?

Answer 1

Given that,

V = 40v,
R = 6.8Kohm,
I = V/R.

I = 40/6.8*(10^-3).

I = 5.882mA.

That is right answer.

Answer 2

Given,

Resistance = 6.8 kΩ

Voltage = 40 V

To Find,

The value of current in milliamperes.

Solution,

By using the ohm's law

V = RI

where V is the voltage, R is the resistance, and I is the current.

So, In this question

V = 40 V and R = 6.8 kΩ = 6.8*1000 = 6800 Ω

Now,

40 = 6800*I

I = 40/6800 = 0.0058 amperes

So,

I = 0.0058 amperes = 0.0058*1000 milliamperes = 5.8 milliamperes.

Hence, the value of the current is 5.8 milliamperes.