A resistor is a device that shows resistance of a passage of electric current. For example, ohmic resistors. Resistors can be of a fixed value, for example: 100 Ohms, (100Ω) or variable as in 0 to 100Ω.

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## What is Ohm’s law class 10?

Ohm’s Law states that the current flowing through a conductor is directly proportional to the potential difference applied across its ends, provided the temperature and other physical conditions remain unchanged. Current is directly proportional to voltage difference through a resistor.

## What is the speed of the electricity?

The electricity is an electromagmentic wave and the speed of electromagnetic waves always equal to 3×10^8 m/s that is the speed of light. Hence the electricity flows at the speed of light that is at 3×10^8 m/s.

## How do you solve numerical class 10?

## For what value of E power across 4 will be 100w?

Potential difference across the resistor 4 ohm is E. Hence power will be 100 watt for the value of E as 20 Volt.

## What are the 3 formulas in Ohm’s law?

3-4: A circle diagram to help in memorizing the Ohm’s Law formulas V = IR, I = V/R, and R= V/I. The V is always at the top. Fig.

## What is the SI unit of Ohm’s law?

The SI unit of electric resistance is the ohm (Ω).

## What is meant by 1 ohm?

One ohm is defined as that resistance of an object when a current of 1 ampere flows through an object having a potential difference of 1 Volt. R=V/I. => 1ohm= 1volt/1ampere.

## Which is faster light or lightning?

Light travels more than 10000 times faster than lightning.

## Is electricity faster in water?

You are young to be considering such a question, but the actual answer is that electricity travels faster through hot water than cold and through turbulent water than still, but the amount of salt or chlorine doesn’t much effect the speed of the electricity moving through the water.

## What is the speed of AC current?

The dimensions of the wire and electrical properties like its inductance affect the exact propagation speed, but usually it will be around 90 per cent of the speed of light – about 270,000 km/s.

## What are the 4 types of resistors?

- Fixed Value Resistors. These are the predominant type of resistor configuration, and as the name suggests, they have a fixed resistance value.
- Variable Resistors.
- Resistor Networks.
- Carbon Film Resistors.
- Metal Film Resistors.
- Wirewound Resistors.
- Metal Oxide Resistors.
- Metal Strip Resistors.

## What is the formula of parallel circuit?

Total voltage of a parallel circuit has the same value as the voltage across each branch. This relationship can be expressed as: ET = E1 = E2 = E3… In the above circuit, the voltage in each branch is 120 V.

## What is the formula of series and parallel?

To find the total resistance, we note that R2 and R3 are in parallel and their combination Rp is in series with R1. Thus the total (equivalent) resistance of this combination is Rtot=R1+R2. First, we find Rp using the equation for resistors in parallel and entering known values: 1Rp=1R2+16.00Ω+113.0Ω=0.2436Ω.

## How can I improve my physics Numericals?

- Focus on the Problem. Establish a clear mental image of the problem. A.
- Describe the Physics. Refine and quantify your mental image of the problem. A.
- Plan a Solution. Turn the concepts into math. A.
- Execute the Plan. This is the easiest step – it’s just the algebra/calculus/etc. A.
- Evaluate the Answer. Be skeptical.

## Which book is best for Physics 10 Numericals?

Mastering Numericals & Objective physics is one the best books you can select for class X.

## How do you calculate Numericals in physics?

First, determine the units of the quantity you’re trying to find and the quantities you have. Only use base units (meters, kilograms, seconds, charge), not compound units (Force is measured in Newtons, which are just kg*m/s2). Multiply and divide the quantities until the units match the units of the answer quantity.

## What is current formula?

Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is I = V/R.

## What is the power dissipated by a 64 Ω is connected to a 4 volt battery?

The power dissipated is 0.25 joules per second.

## How do I calculate current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## What is the unit of current?

The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 ×10−19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ∆νCs.

## What is a watt formula?

Amps (A) x Volts (V) x Power Factor = Watts (W)

## What is Watt’s law?

Watt’s law defines the relationship between power, amperage, and voltage drop in an electrical circuit. Watts Law also states that the power of an electrical circuit is the product of its voltage and current.

## What is the value of 1 ohm?

Reduced to base SI units, one ohm is the equivalent of one kilogram meter squared per second cubed per ampere squared (1 kg times m 2 · s -3 · A -2 . The ohm is also the equivalent of a volt per ampere (V/A).

## What is a 1 ohm resistor?

The 1 ohm resistor is most likely used to simulate a rather large capacitor ESR value. That resistor makes the capacitor less effective in filtering the full wave rectified sine wave. For some numerical results, see the attachment.