Concepts Of Physics MCQ Edition [Volume 2]PhysicsThermal and Chemical Effects of Electric Current

A wire with a resistance of 25 carries an electric current of 2.0 A . Determine the amount of heat developed in 1 minute.

Options

A50 J
B3000 J
C100 J
D6000 J

Correct answer

D. 6000 J

Step-by-step solution

Given: Resistance of the wire, R = 25 Current, I = 2.0 A Time, t = 1 minute = 60 s The amount of heat developed is given by Joule's law of heating: H = I^2 R t Substituting the given values: H = (2.0)^2 25 60 H = 4 25 60 H = 100 60 H = 6000 J

Practice Thermal and Chemical Effects of Electric Current on Quantrex Academy →

More from Thermal and Chemical Effects of Electric Current

A heater coil has a specification of 250 V , 500 W . Determine the resistance of the coil. Additionally, what will be the resistance of a 1000 W coil designed to operate at the sam A nichrome wire ( = 1.0 10⁻⁶ m ) is used to build a heater coil intended to operate at 500 W when connected to a 250 V supply. Determine the resistance of the coil.A heater coil, designed to operate at 500 W across a 250 V supply, is fabricated from a nichrome wire having a resistivity of 1.0 10⁻⁶ m . If the wire has a cross-sectional area of A nichrome wire ( = 1.0 10⁻⁶ m ) with a cross-sectional area of 0.5 mm ^2 is used to wrap a heater coil that operates at 500 W when connected to a 250 V supply. If each turn of the A coil with a resistance of 100 is connected across a battery having an emf of 6.0 V . Assuming all the heat developed in the coil goes into raising its temperature, and given that When connected across a 220 V power supply, an electric bulb consumes 60 W of power. What will be the power consumed if the supply voltage drops to 180 V , and what will it be if t A bulb with a rating of 250 V , 100 W is connected to a 220 V power supply situated 10 m away, utilizing a copper wire with a cross-sectional area of 5 mm ^2 . Determine the power An electric bulb marked 220 V , 100 W will get fused if it is made to consume 150 W or more. What maximum voltage can the bulb withstand? Full Thermal and Chemical Effects of Electric Current list All Concepts Of Physics MCQ Edition [Volume 2] PYQs