What is meant by the resistance of a component?

What is meant by the resistance of a component?

The wires and the other components in a circuit reduces the flow of charge through them. This is called resistance. For example, a 2 Ω component has a greater resistance than a 1 Ω component, and will reduce the flow of charge through it more effectively. …

What is meant by electrical resistance?

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).

What is the best definition of electrical resistance?

Electrical-resistance meaning (physics) The opposition offered by an electrical conductor to the flow of a current through itself, resulting in a conversion of electrical energy into heat and radiation. The SI derived unit of resistance is the ohm. Symbol: R. noun.

What is resistor electrical resistance?

Resistor is an electrical component that reduces the electric current. The resistor’s ability to reduce the current is called resistance and is measured in units of ohms (symbol: Ω). If we make an analogy to water flow through pipes, the resistor is a thin pipe that reduces the water flow.

What are the factors affecting the resistance?

There are several factors that affect the resistance of a conductor;

• material, eg copper, has lower resistance than steel.
• length – longer wires have greater resistance.
• thickness – smaller diameter wires have greater resistance.
• temperature – heating a wire increases its resistance.

What is resistance and its formula?

V is the potential difference in volts , V. I is the current in amperes (amps), A. R is the resistance in ohms, Ω The equation can be rearranged to find the resistance: R = V ÷ I Question.

What is electrical resistance simple words?

The electrical resistance of an electrical conductor is a measure of the difficulty of passing an electric current through a substance. With more resistance in a circuit, less electricity will flow through the circuit. The inverse of resistance is conductance, a measure not much used.

What is electrical resistance and its unit?

The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S) (formerly called “mho”s and then represented by ℧). All objects resist electrical current, except for superconductors, which have a resistance of zero.

Is electrical resistance important?

Resistance is another important property that can be measured in electrical systems. The same is true with electricity. Materials with low resistance let electricity flow easily. Materials with higher resistance require more voltage (EMF) to make the electricity flow.

What are the 3 factors that affect resistance?

Resistance is the property of the material that restricts the flow of electrons. There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.

What is the relationship between resistance and current?

The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.

What is the example of resistance?

Resistance is defined as a refusal to give in or to something that slows down or prevents something. An example of resistance is a child fighting against her kidnapper. An example of resistance is wind against the wings of a plane.

What does resistance do in an electric circuit?

REVIEW: Resistance is the measure of opposition to electric current. A short circuit is an electric circuit offering little or no resistance to the flow of current. An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout.

What does resistance mean in an electrical circuit?

Resistance, in electricity, property of an electric circuit or part of a circuit that transforms electric energy into heat energy in opposing electric current. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductors.

What is meant by the resistance of an electrical component?

Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).

What is the effect of resistance on electrical energy?

The resistance of electrical conductor causes the heat generation when current flows through it. This is lost energy when it occurs in a current source such as a generator or a battery, or in a convertor of energy such as an electric motor. Friction also accounts for energy loss in a motor.