Question

A current of 200 mA flows through a 4kΩ resistor. What is the potential difference across the resistor​

Answer 1

Answer:

Explanation: Given'

Current(I) = 200 mA or 200 × 10^-3

Resistance(r) = 4k ohms or 4 × 10^3

Potential difference =?

We know,

Ohm's law:

V = IR

V = 200 × 10^-3 × 4 × 10^3

V = 800 volts

Answer 2

Qᴜᴇsᴛɪᴏɴ :-

A current of 200 mA flows through a 4kΩ resistor. What is the potential difference across the resistor?

ᴀɴsᴡᴇʀ :-

We know that,

➠ 1mA = 1/1000 A

So,

➠ 200mA = 1/1000 × 200 = 200/1000 = 0.2 A

• Current (I) = 0.2 A

Now,

➠ 1kΩ = 1000Ω

So,

➠ 4kΩ = 1000 × 4 = 4000Ω

• Resistance (R) = 4000Ω

Now,

According to Ohm's Law, we get

➠ Potential Difference (V) = Current(I) × Resistance(R)

➠ V = I × R

Put the above given values in it, we get,

➭ V = 0.2 × 4000

➭ V = 2 × 400

➭ V = 800

Hence,

• Potential Difference (V) = 800 Volt