A manufacturer wants to design heating elements that generate more heat when a current passes through. Which material property should be maximized for this purpose?
Resistivity should be maximized to increase heat generation for a given current.
The heat produced in a conductor carrying current is given by Joule's law, H = I²Rt, where R is the resistance of the material.
For a fixed current and time, heat generated is directly proportional to resistance, and resistance itself is directly proportional to resistivity of the material.
This is why heating elements such as those in electric heaters and toasters are made of alloys like nichrome, which have high resistivity.
Hence, resistivity should be maximized to increase heat generation for a given current.
Similar Questions
The resistance of a conductor depends on the:
A student constructs a circuit with a battery of 12 V and two resistors of 6 ohms and 4 ohms connected in series. What is the total current flowing through the circuit according to Ohm's Law?
If the power consumed by a bulb is 60 W and the voltage across it is 120 V, what is the resistance of the bulb?
Which of the following graphs best represents Ohm’s Law for a resistor at constant temperature?
What is the function of the cartridge (such as porcelain) encasing the fuse wire?
What does the given symbol represent in an electric circuit diagram?
Suppose a household replaces all 5 A sockets with 15 A sockets and connects multiple high-power appliances to each. What potential risk does this introduce, and why?
Electric fuses are used in household circuits primarily to ___________.
A student sets up two circuits: Circuit X uses a thin, long copper wire, and Circuit Y uses a thick, short copper wire, both connected to identical batteries. Which circuit will have a higher resistance, and why?
In a circuit, two resistors R₁ and R₂ are connected in parallel. If R₁ = 4 Ω and R₂ = 12 Ω, and the total voltage across the parallel combination is 6V, what is the total current flowing in the circuit?
Important Questions from Current Electricity
Which of the following is a bad conductor of electricity?
In general, in an alternating current circuit
The laws of electromagnetic induction have been used in the construction of a
A 220 volt and 100 watt bulb is connected to a 110 volt source. The power consumption by the bulb is
Which of the following statement is correct?
I. 1 kWh = 3.6 × 10 6J.
II. The SI unit of electric current is the ampere.
