# How do you calculate current through a resistor and voltage?

Table of Contents

## How do you calculate current through a resistor and voltage?

Ohm’s Law states that V=I*R, where V is voltage, I is current and R is resistance. In a series circuit, the voltage drop across each resistor will be directly proportional to the size of the resistor. In a parallel circuit, the voltage drop across each resistor will be the same as the power source.

**How much voltage can a 1k resistor handle?**

With a 1k resistor already in series, the meter will read 20/21 * 12 volts = 11.43 volts. A better voltmeter would use a 50 microamp meter. For a 20v full scale. this would require a 400k series resistor.

### How much does a 1k resistor resist?

So, a 1k Ω resistor has a value of 1,000 ohms and the number we will code is 1,000.

**What is a 1K resistor used for?**

3 Answers. The 1k resistor is a pull-down resistor. Not the weakest one of that, but that’s okay. It is meant to pull the base of the transistor to a known state (ground) when the control signal is missing/open/high input.

#### What is the work of 1K resistor?

The 1k resistor is a pull-down resistor. Not the weakest one of that, but that’s okay. It is meant to pull the base of the transistor to a known state (ground) when the control signal is missing/open/high input.

**How do you find the voltage applied across a 15K resistor?**

[Voltage (V) = Current (I) x Resistance (R)] V (volts) = I (amps) x R (Ω) Find the voltage applied across 15 kΩ resistors when 10 mA current flows through it. Solution: Voltage (volts) = Current (amps) x Resistance (Ω); V = 10 mA x 15 kΩ; V = 150 V

## How do you calculate the resistor value for LED lights?

How to Calculate Resistor Value for LED Lighting. We’ll use the following formula to determine the resistor value: Resistor = (Battery Voltage – LED voltage) / desired LED current. For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/.010=860 ohms.

**How do you calculate current from voltage and resistance?**

You can calculate current using the given formula! Current Formula: [Current (I) = Voltage (V) ÷ Resistance (R) ] I (amps) = V (volts) ÷ R (Ω) For Example: Find the current flowing through a 3 Ω resistor when a potential difference of 30 V is applied across it.

### How do you calculate power dissipated across a resistor?

If voltage and current are given, then you can easily calculate the value of the power. If the application of 15 Voltage potential drop across a resistor results in 10 mA current flowing through it, then how to evaluate the power dissipated across it. Solution: P = V * I; P = 15 V * 10 mA; P = 0.15 W