How is power dissipated in a resistor by?
How is power dissipated in a resistor by?
Any resistor in a circuit that has a voltage drop across it dissipates electrical power. This electrical power is converted into heat energy hence all resistors have a power rating. This is the maximum power that can be dissipated from the resistor without it burning out.
What is the power dissipated in the resistor and the current in the primary coil?
The power dissipated is calculated as (voltage^2/resistance). Since the voltage is fixed, smaller resistance results in higher power dissipation. Alternatively, smaller resistance means that the current flowing through that resistor is larger. And the power dissipated can be calculated as (voltage * current).
How do you calculate heat dissipated by a resistor?
- Calculate the power loss in Resistor by P= I^2* R.
- multiply with time T for watt seconds i.e joules.
- 1 joule is 1 watt second.
- divide it by 4.2 to get calories of heat.
What is the power dissipated in an AC circuit?
zero
Therefore, power dissipated through the AC circuit is zero.
What happens to the power dissipated by a resistor as the current through the resistor increases?
The power dissipated in a resistor is given by P = V2/R which means power decreases if resistance increases.
What is power dissipated proportional to?
The power dissipated in a resistor is proportional to the square of the current that passes through it and to its resistance. We can incorporate this equation to obtain an equation for electrical energy based on current, resistance, and time.
How much power is dissipated as heat by the resistor?
W=VIt. Because this circuit consists of only one resistor, the entire work done goes into energy lost through power dissipation by this resistor, by conservation of energy. Differentiating with respect to time, one obtains the rate of power dissipation in the resistor: P = d W d t = I V = I 2 R = V 2 R .