What is resistance definition physics?

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). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.

What is the simple definition of resistance?

1 : an act or instance of opposing. 2 : the ability to withstand the force or effect of resistance to disease. 3 : an opposing or slowing force The car’s sleek design reduces wind resistance. 4 : the opposition offered by a substance to the passage through it of an electric current.

What does G mean in resistance?

Conductance is the opposite of resistance: the measure of how easy it is for electric current to flow through something. Conductance is symbolized with the letter “G” and is measured in units of mhos or Siemens. Mathematically, conductance equals the reciprocal of resistance: G = 1/R.

What is resistance class 9?

Resistance is defined as an opposition to current flow. An electrical circuit must have resistance in it in order to change electrical energy to light, heat or movement. Resistance is known that the directed movement of electrons constitutes a current flow.

What is resistance class 10 Ncert?

Resistance is a property of conductor due to which it resists or opposes the flow of electric current through it. The way a surface offers resistance to movement by offering friction, conductors oppose the flow of current.

What is resistance write its unit?

The resistance of a conductor is defined as the ratio of the potential difference across its end to the current flowing through it. Its SI unit is ohm (Ω).

What does RJ mean in resistors?

Compact Size (RJ) Dimensions
Type RJ74S
MIL-R-10509F type RN55
Resistance range (Ω) 0.1 ~ 22M
Resistance tolerance (%) A5 ( ±0.05 ), B ( ±0.10 ), C ( ±0.25 ), D ( ±0.50 ), F ( ±1.0 ), J ( ±5.0 )

What is the resistance equation?

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 resistance class 7th?

1. Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. The resistance of conductors depends on 4 things: the length of the conductor, the temperature of conductor, material, and the cross-sectional area.

What is resistance class 10 short answer?

Resistance: Resistance is a property of conductor due to which it resists the flow of electric current through it. A component that is used to resist the flow of electric current in a circuit is called a resistor.

What is 10R in resistance?

10R = 10 ohm. 1k2 = 1,2 kohm. 12k = 12 kohm. 1M = 1 Mohm.