## What happens when you add a resistor in series with a load?

What happens to the total resistance of a circuit when resistors are added in a series? – Quora. It increases the overall circuit resistance. Two resistors added in series are added together to give the total resistance. Example, circuit with two 10 ohm resistors will have a total circuit resistance equal to 20 ohms.

### What is the purpose of a load resistor?

A load resistor is a resistor that has the sole function of increasing the load resistance of the circuit to a specific level.

#### Why is a series resistor required?

A series resistor will ensure that slight differences in voltage have only a minor effect on the LED’s current, provided that the voltage drop across the resistor is large enough.

**What is the connection between a load and a resistor?**

In a circuit, an element which consumes electric power is considered as a load. Resistor also consumes power. So, resistor can be represented instead of load, or, every load is consuming power as the same way as resistor consumes. Example of load in electric circuits are appliances and lights.

**Does a load decrease voltage?**

Whenever load is connected to any device or machine then it draws more current than before and when current increases then voltage decreases.

## Is a switch a load?

A load switch is simply a switch, mechanical or electronic, that connects or disconnects a load to the high side of a power source. A wall light switch is a load switch. Any off/on switch on an appliance or electronic product is a load switch. A relay can be a load switch.

### What is effective resistance of series DC Circuit?

Voltage drop across whole series DC circuit, V = Voltage drop across resistor R 1 + voltage drop across resistor R 2 + voltage drop across resistor R 3. According to Ohm’s law, the electrical resistance of an electrical circuit is given by V ⁄ I and that is R. Therefore, So, effective resistance of the series DC circuit is .

#### How are current and resistor related in series L-R circuit?

Current lags voltage in a series L-R circuit. For the resistor and the inductor, the phase relationships between voltage and current haven’t changed. Voltage across the resistor is in phase (0o shift) with the current through it; and the voltage across the inductor is +90o out of phase with the current going through it.

**How is voltage drop for series connected resistors calculated?**

The potential divider circuit above shows four resistances connected together is series. The voltage drop across points A and B can be calculated using the potential divider formula as follows: We can also apply the same idea to a group of resistors in the series chain.

**Why do I need a series resistor on my led?**

The slightest difference in LED or supply voltage may cause the LED to light very dim, very bright, or even destroy. A series resistor will ensure that slight differences in voltage have only a minor effect on the LED’s current, provided that the voltage drop across the resistor is large enough.