Table of Contents
Resistors ensure components receive the proper voltage by creating a voltage drop, and they can protect a component from voltage spikes. If a component in your circuit requires less voltage than the rest of your circuit, a resistor will create a voltage drop to ensure the component does not receive too much voltage.
Why is resistance necessary in a circuit?
Resistance is an important factor in electronic circuits, higher resistance makes the current flow more difficult, lower resistance makes the current flow less difficult.
What happens if there is no resistor in a circuit?
a) If there is no resistor in the circuit ( as in , if you completely remove the resistor) , then there will be no current flowing in the circuit. However, there will be a voltage at the 2 terminal points where the removed resistor used to be.
What are resistors used for in real life?
Resistors are electrical components in an electric circuit that slow down current in the circuit. Appliances such as electric heaters, electric ovens, and toasters all use resistors to turn current into heat, then using the heat lost from this resistor to warm the surrounding area.
What is a resistor and why is it important class 10?
Answer: A resistor is an element or component which reduces the electrical current and supply the electricity to the electrical or electronic goods in a controlled manner. It also saves these goods from damage that may occur due to excessive supply of electricity. Q.
Can current flow without resistor?
Here’s a simple circuit with only a current source and a wire. In this circuit, there is a 1A current circulating clockwise around the circuit. So, the answer is yes, there can be a current in a circuit without a resistor.
Do resistors reduce voltage?
Resistors don’t reduce current and voltage instead it opposes flow of current and produce drop in voltage across the terminals.
What happens if you remove a resistor?
If a resistor is removed then the resistance is decreased, if resistance is decreased the current becomes more. As you know the voltage drop will exeed at a point where the higher resistance in the circuit.
Is a battery a resistor?
A battery can be thought of as a perfect voltage source with a small resistor (called internal resistance) in series. The electric energy density produced by the chemistry of the battery is called emf, but the amount of voltage available from the battery is called terminal voltage.
Is a light bulb a resistor?
A resistor or any other device can be a load and a load on the circuit can be a resistor or any other device. A resistor in a circuit is a load. A lightbulb is a resistor that gets hot enough to emitt light.
What are the 4 types of resistors?
Different Types of Resistors – Fixed, Variable, Linear and Non-Linear Resistors & Applications Carbon Composition Resistors. Wire wound Resistors. Thin Film Resistors. Carbon Film Resistors. Metal Film Resistors. Thick Film Resistors. Metal Oxide Resistors. Cermet Oxide Resistors (Network Resistors).
What is the importance of resistors in gadgets such as cellphones and laptops?
A resistor may not look like much. One may think it doesn’t do anything except consume power. However, it performs a vital function: controlling the voltage and the current in your circuit. In other words, resistors give you control over the design of your circuit.
What is resistor short answer?
A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor.
What is resistor in BYJU’s?
Resistor is defined as. A passive electrical component with two terminals that are used for either limiting or regulating the flow of electric current in electrical circuits. The main purpose of resistor is to reduce the current flow and to lower the voltage in any particular portion of the circuit.
What is resistor and resistance in physics?
Answer: Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.
Can resistors lose resistance?
If you’re running the resistor at or above its maximum rated power, it may gradually degrade over time, the actual resistance value drifting off spec until it either fails completely or gets far enough off its normal value that the circuit it is part of stops working.
Can you have 0 resistance?
Resistance can never be 0 though. When the resistance in any circuit is equal to zero then the current passing through that circuit will be infinite.
What is the voltage if there is no resistance?
Which is zero. So voltage is 0 if resistance is zero that is condition of short circuit and current will be very high.
Do resistors go on positive or negative?
Placing the resistor on the positive (anode) side of the resistor will have no differing effects from placing the resistor on the negative (cathode) side of the LED. So don’t sweat it, just pick a side!Nov 30, 2018.
Do resistors do anything to current?
A circuit always has a bit of resistance, no matter if it has resistors or not in it. So yes, the resistor does reduce the current. (But the current flowing into the resistor is still the same as the current flowing out.)Oct 9, 2018.
How do resistors reduce current?
The resistor reduces the current, just like the narrow pipe reduces the flow rate. The current before and after the resistor is the same, just like the flow rate before and after the narrow pipe is the same. It reduces the current compared to a different circuit where the resistor is replaced with an ideal wire.
