What is the relation between resistance and Watt?

What is the relation between resistance and Watt?

For example, P = V2/R implies that the lower the resistance connected to a given voltage source, the greater the power delivered.

What is the relationship between power potential difference and resistance?

Resistance R of a conductor is defined as the ratio of the potential difference V applied across it to the current I flowing through it. where R is resistance,  is resistivity of the material, l is its length and A is its cross-sectional area. The same relationships apply in networks of identical resistors.

What is the kind of relationship between Ohm and W?

The relationship between voltage, current, and resistance is described by Ohm’s law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r.

How does resistance affect power?

The unit of power is the Watt (W). When the voltage is increased, the current, I, increases and the power dissipated by the resistor, R, increases. When the value of the resistor is increased, I decreases and the power dissipated by the resistor, R, decreases.

Do resistors affect voltage?

The larger the resistor, the more energy used by that resistor, and the bigger the voltage drop across that resistor. Also, Kirchhoff’s circuit laws state that in any DC circuit, the sum of the voltage drops across each component of the circuit is equal to the supply voltage.

How is the power of a resistor determined?

If the value of resistance of the resistor is 100 ohms and current applied is 0.5A, then the power will be Thus the power through the resistor would be 25W. But what if we don’t know the value of current flowing but the voltage supplied.

What is the relationship between voltage and resistance?

Ohm’s Law. The relationship between voltage, current, and resistance is described by Ohm’s law. This equation, i = v / r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. In other words, if we increase the voltage,…

How to calculate the resistance of a circuit?

If our ammeter measured a current of 5 amperes flowing through the circuit, then the resistance is equal to 20 volts divided by 5 amperes, which is 4 ohms To determine the voltage, multiply the current (3 amperes) by the resistance (4 ohms).

Why does power dissipation occur in a resistor?

Furthermore, power dissipation in resistors is considered a naturally occurring phenomenon. The fact remains that all resistors that are part of a circuit and has a voltage drop across it will dissipate electrical power. Moreover, this electrical power converts into heat energy, and therefore all resistors have a (power) rating.