State One Example When Resistance Is Desirable

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What is one example of resistance desirable?

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Term The first recorded references to static electricity and lightning were made over 2 500 years ago by Definition Greek Philosophers
Term State one example when resistance is desirable. Definition Electric heater or a light bulb

What is a resistance example?

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 are some examples of high resistance?

Insulators: Materials that present high resistance and restrict the flow of electrons. Examples: Rubber paper glass wood and plastic.

What is an example of when electrical resistance is a bad thing?

Resistance can be both good and bad. If we are trying to transmit electricity efficiently from one place to another through a conductor resistance is undesirable in the conductor. … In a light bulb the electricity flowing through the filament or the tiny wires inside the bulb cause them to glow white hot.

What are the three sources of EMF?

Devices that can provide EMF include electrochemical cells thermoelectric devices solar cells electrical generators transformers and even Van de Graaff generators. In nature EMF is generated whenever magnetic field fluctuations occur through a surface.

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What is Ohm’s law state?

Ohm’s law states that the current through a conductor is proportional to the voltage across the conductor. This is true for many materials (including metals) provided the temperature (and other physical factors) remain constant.

What is an example sentence for resistance?

Resistance sentence example. He went without resistance . The girl yesterday offered no resistance . The reminder of what he was made her angry and bolstered her resistance .

What is a good sentence for resistance?

Examples of resistance in a Sentence

Noun They have shown a stubborn resistance to change. The troops met heavy resistance as they approached the city. The paint shows good weather resistance. Over time the patient could develop a resistance to the drug.

How do you explain resistance to a child?

Resistance – Resistance measures how well a material or object conducts electricity. Low resistance means the object conducts electricity well high resistance means the object does not conduct electricity well.

What is the high resistance?

High electrical resistance is the opposition to current flow within a circuit. … A high electrical resistance of an electrical conductor is the opposition to the flow of an electric current through that conductor the inverse measure is known as electrical conductance.

What is the highest resistance value?

517 K.

The highest possible value is 517 K. The lowest possible value is 423 K. The total range of possible resistances is almost 100K. The fourth resistor’s nominal value is 680 K.

Which is the highest resistivity?

Nichrome has the highest resistivity and shows the heating effect of electric current because of its high resistance it opposes the flow of current and hence it produces a lot of heat.

What is an electric conductor give examples of good electric conductors?

Materials that have low resistance to electric current are called electric conductors. Many metals—including copper aluminum and steel—are good conductors of electricity. The outer electrons of metal atoms are loosely bound and free to move allowing electric current to flow.

Does plastic have a high resistance?

Plastic materials are often selected for applications that require toughness and impact resistance. Certain plastics such as ABS polycarbonate PPSU and UHMW have outstanding toughness. … Plastic material with excellent mechanical strength stiffness and abrasion resistance.

Which of the following is the good conductor?

Now from the given options graphite is the good conductor of electricity.

What are the 5 sources of emf?

The five sources of EMF are: Electromagnetism Photoelectric Thermoelectric Piezoelectric and Chemical.

What are sources of electromotive force?

electromotive force abbreviation E or emf energy per unit electric charge that is imparted by an energy source such as an electric generator or a battery. Energy is converted from one form to another in the generator or battery as the device does work on the electric charge being transferred within itself.

What produces an electromotive force?

In nature emf is generated when magnetic field fluctuations occur through a surface. … The emf is countered by the electrical voltage due to charge separation. If a load is attached this voltage can drive a current. The general principle governing the emf in such electrical machines is Faraday’s law of induction.

What is an example of Ohm’s law?

What is CBSE 10th resistivity?

Resistivity is defined as the electrical resistance of a conductor of unit cross-sectional area and unit length. The resistance of any conductor is directly proportional to the length of the conductor and inversely proportional to the area of cross-section of the conductor.

Is house electricity AC or DC?

When you plug things into the outlet in your house you don’t get DC. Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time).

What does resistance mean in history?

the act or power of resisting opposing or withstanding. the opposition offered by one thing force etc. to another.

What is an act of resistance meaning?

uncountable noun. Resistance to something such as a change or a new idea is a refusal to accept it.

What does resistance mean in chemistry?

Chemical resistance is the strength of a material to protect against chemical attack or solvent reaction. It is the opposite of chemical reactivity. … A chemical resistance chart may be used to see the relative resistance of materials.

What is the best synonym for resistant?

durable
  • resistant.
  • sound.
  • stable.
  • stout.
  • strong.
  • substantial.
  • tenacious.
  • tough.

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How do you use piece de resistance in a sentence?

the outstanding item (the prize piece or main exhibit) in a collection 2. the most important dish of a meal. 1 Of all the events the piece de resistance will be a gala night at the King’s Hall. 2 Father Tim said mildly having saved this piece de resistance for the right moment.

What is the definition of resistance quizlet?

Resistance. The measure of how difficult it is for charges to flow through a material.

What is an example of a resistor for kids?

A resistor limits the electrical current that flows through a circuit. For example in a light bulb there is a resistor made of tungsten which converts the electrons into light. …

What are resistors used for kids?

The resistor is the part of an electrical circuit that resists or limits the power of an electrical current in a circuit. The resistor also helps to reduce or lessen the amount of electricity moving through the circuit.

What do you understand about 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). … All materials resist current flow to some degree.

What causes higher resistance?

The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

What is low and high resistance?

Simply put a material with high resistance requires a high potential to generate a given amount of current in the material. A material with low resistance requires a low potential to generate the same amount of current. … Therefore the resistance of a material is related to the material’s ability to dissipate energy.

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What is the low resistance?

A low resistance measurement is typically a measurement below 1.000 ohm. … The lower range on many low resistance ohmmeters will resolve 0.1 micro-ohms.

Which is the following is a resistance?

In this following words agriculture is the resistance.

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