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A voltage source of 20v is applied across the terminals of a 2.5-ohm rheostat. Calculate the power dissipated in the rheostat?
We can treat the rheostat as a resistor. There is a formula "V squared over R" that gives the power lost. In this case, that would be 400/2.5 or 160 Watts. You could also find the current using Ohm's law: V=IR so I=V/R=8 Amps. You can then find power as P=VI = 20V x 8A = 160 Watts.
What else can I help you with?
What does T1 or T2 mean in electrical terms?
T1 and T2 commonly refer to the primary and secondary terminals of a transformer. T1 is typically the primary side where the input voltage is applied, while T2 is usually the secondary side where the output voltage is obtained. The terminals are used to connect the transformer to the electrical circuit.
Can 100 megawatts kill you?
yes. 1 watt can kill you, delivered in the right place with the right voltage. 30 volts applied from one arm to the other, which goes through your heart, with the terminals on pins stabbed into the arms, will produce more than 30mA. That is enough.
How does K be determined?
K, also known as the spring constant, is determined experimentally by measuring the force applied to a spring and the resulting displacement. The formula to calculate K is K = F / x, where F is the force applied and x is the displacement. By plotting the force-displacement data and calculating the slope of the line, the spring constant can be determined.
How do you calculate the force exerted on an object in a well flowing at a given rate?
To calculate the force exerted on an object in a well flowing at a given rate, you can use the formula: Force = Pressure x Area. First, calculate the pressure at the depth of the object in the well using the fluid's density, gravity, and depth. Then, determine the cross-sectional area of the object to which the pressure is being applied. Multiply these values to find the force exerted on the object.
Does the law of applied forced state that a body's change in mass is proportional to the amount of force applied to it?
The Law of Applied Force states that a body's change in mass is proportional to the amount of force applied to it.
When the voltage applied to the rheostat is doubled then tripled what happens to the rheostat?
The heat released by the rheostat with double the voltage will quadruple. When voltage is tripled, the power loss is 32 or 9 times that before. A rheostat is a kind of variable resistor. Since E = IR (voltage equals current times resistance), then I = E/R (current equals voltage divided by resistance). If the voltage is doubled and the resistance stays the same, then--you can see by the formula--the current would double. Now, power dissipated by a resistor is related to the product of the current and voltage (P = IE). But since a doubling of voltage produces also a doubling of current, double the current results in 2X2=4 times the power (heat) loss.
What is the work of friction formula and how is it used to calculate the energy dissipated due to friction in a mechanical system?
The work of friction formula is W Fd, where W is the work done by friction, F is the force of friction, and d is the distance over which the force is applied. This formula is used to calculate the energy dissipated due to friction in a mechanical system by multiplying the force of friction by the distance over which it acts.
What is reciprocity theorem in antenna?
If a voltage is applied to the terminals of an antenna A and the current is measured at the terminals of another antenna B, then an equal current (in both amplitude and phase) will appear at the terminals of A if the same voltage is applied to B.Ref:http://www.cv.nrao.edu/course/astr534/AntennaTheory.html
How much power will be dissipated by a 9 ohm resistor if 9 volts are applied across it?
P = (E2)/R = 81/9 = 9 watts
How can maths be applied in cricket?
to calculate the batsmans total
How do you calculate under and over applied OH?
To calculate under or overapplied overhead, subtract the actual overhead costs from the applied overhead costs. If the actual overhead costs exceed the applied overhead costs, it is overapplied. If the applied overhead costs exceed the actual overhead costs, it is underapplied.
How do you calculate the amount of over or underapplied overhead?
how do you calculate the amount of the over-or under applied factory overhead?
How much is the potential difference between the terminals of a connection wire?
The potential difference between the terminals of a connection wire is determined by the voltage difference applied across the wire. This voltage difference creates an electric field within the wire that causes charge carriers to move and establish a potential difference between the terminals.
How does electricity flow through a light?
A voltage is applied across the terminals of the light fixture to which the bulb is attached by two terminals, hot and neutral. A current then flows through the bulb. In an incandescent light the filament wire heats up and glows.
What diode is used as voltage controlled capacitor?
It is called a varactor or a varicap diode. Its capacitance varies nonlinearly with the reverse voltage applied to its terminals.
Is overhead applied after the period?
Overhead is applied at start of production to calculate the cost of goods manufactured and to determine the total cost and profit as well.
What is the formula to calculate the total work done in a system?
The formula to calculate the total work done in a system is W Fd, where W represents work, F is the force applied, and d is the distance over which the force is applied.
