0
An electric iron of resistance 20 ohms takes a current of 5A Calculate the heat developed in 30 seconds?
Wiki User
∙ 11y 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
∙ 11y ago
Add your answer:
Earn +20 pts
Will a circuit component with a high resistance will have a low electric current?
Yes
What is a material that conducts electric current slowly?
Material with high resistance
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?
An electric furnace in which the heat is developed by the passage of current through a suitable internal resistance that may be the charge itself, a resistor embedded in the charge, or a resistor surrounding the charge.
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 effect does heat have on electric current flow?
It increases resistance.
What does an electric current always follow?
The path of least resistance.
What path with an electric current always follow?
"least resistance"
