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An electric iron of resistance 20 ohms takes a current of 5A Calculate the heat developed in 30 seconds?
Wiki User
∙ 12y ago
heat developed = 5*5*20*30 = 15000 joules
AnswerWith the information supplied, you can only determine the work done (W) by the circuit, not the heat (Q). To do so, you will need to know the mass (m) and specific heat capacity (C) of the conductor, and the temperature-difference between the conductor and its surroundings. The equation you need to do this is:
W - Q = m C (Tf-Ti)
With the information supplied, you can only calculate the work done: W = I2Rt.
Wiki User
∙ 12y ago
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What is a material that conducts electric current slowly?
Material with high resistance
Will a circuit component with a high resistance will have a low electric current?
Yes
What effect does decreased resistance have on a circuit?
resistance is the opposition to the flow of an electric current, therefore the current will decrease as the resistance increases. Resistance also creates heat. This is how the light globes in a circuit light up.
What is the formula of electric current?
the formula for electric current is VI ,where v is voltage then I is the current. the unit used for current is ampere and volts for voltage. multiply the total I to the Voltage The formular of electric current is given by I=V/R ,I=P/V
Of these 4 copper wood silicon aluminum which material would have the highest resistance to the flow of electric current?
silicon
How do we calculate?
V = I x R V = voltage, I = Current, R = Resistance or it can be calculate like this V = P / I V = Voltage, P = Electric Power, I = Current
How do we calculate voltage?
V = I x R V = voltage, I = Current, R = Resistance or it can be calculate like this V = P / I V = Voltage, P = Electric Power, I = Current
What will an electric current follow?
An electric current follows the path of least resistance.
What is a resistance furnace?
A resistance furnace is a type of heating system that uses electrical resistance to generate heat. It typically consists of a chamber or furnace where the material or workpiece to be heated is placed, and heating elements that produce the necessary heat through resistance to electric current. Resistance furnaces are commonly used in material processing, heat treatment, and industrial applications.
The current in an electric current varies inversly as the resistance when the current is 25 amps the resistance is 16ohms What is the current when the resistance is 10ohms?
40 A -providing the voltage remains constant.
What is the difference between a resistance and a capacitor?
resistance refers to the resistance of flow of electric current wile a capacitor is an electric device that stores energy.
What is the path that an electrical current travels?
electric current
Would increasing the resistance increase electric current?
no
What property of a wire increases when it is made thinner?
It's resistance to electric current increases.
What path with an electric current always follow?
"least resistance"
Do living cells have a high resistance to electric current?
yes
What effect does heat have on electric current flow?
Increasing heat can increase the resistance of the material through which the current flows, which can reduce the flow of electric current. However, in some cases, heat can also increase the kinetic energy of charge carriers, leading to increased current flow in certain materials like semiconductors.
