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Thermal and Chemical Effects of Electric Current — JEE Main & Advanced Physics PYQs

43 previous year questions from Thermal and Chemical Effects of Electric Current with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

43 questionsPhysicsSolutions on every page
1

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

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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

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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.

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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

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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

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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

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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

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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

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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?

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An immersion heater rated at 1000 W , 220 V is utilized to heat 0.01 m ^3 of water. Assuming that the power is supplied at 220 V and 60 % of the supplied power goes into heating th

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A servo voltage stabiliser limits its output voltage to 220 V 1 % . When an electric bulb rated at 220 V , 100 W is connected to this stabiliser, determine the minimum and maximum

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When the room temperature is 25^ C , an electric kettle used for preparing tea takes 2 minutes to boil 4 cups of water (where 1 cup contains 200 cc of water). Calculate the cost of

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When the room temperature is 25^ C , an electric kettle used for preparing tea takes 2 minutes to boil 4 cups of water (where 1 cup contains 200 cc of water). Given that the cost o

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The coil of an electric bulb requires 40 W to begin glowing. When more than 40 W is supplied, 60 % of the surplus power is converted into light, while the remainder turns into heat

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As illustrated in the figure, the 2.0 resistor is immersed in a calorimeter containing water. The combined heat capacity of the calorimeter and the water is 2000 J K ⁻¹ . If the ci

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A 6 V ideal battery, a 1 resistor, and a 2.0 resistor are connected in series. The 2.0 resistor is dipped into a calorimeter containing water. The heat capacity of the calorimeter

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The junction temperatures of a bismuth–silver thermocouple are kept at 0^ C and 0.001^ C . Determine the developed thermo-emf (Seebeck emf). Given for bismuth–silver, a = -46 10⁻⁶

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Determine the thermo-emf developed in a copper-silver thermocouple if the junctions are maintained at 0^ C and 40^ C . Use the data from the table.

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Determine the neutral temperature and the inversion temperature of a copper–iron thermocouple when the reference junction is maintained at 0^ C . Use the data provided in the table

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Determine the charge required to pass through an electrolyte in order to liberate one atom of a monovalent material.

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Determine the charge required to pass through an electrolyte in order to liberate one atom of a divalent material.

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Determine the amount of silver liberated at the cathode if a current of 0.500 A flows through an AgNO ₃ electrolyte for 1 hour. The atomic weight of silver is 107.9 g mol ⁻¹ .

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An electroplating unit deposits 3.0 g of silver onto a brass plate over a period of 3.0 minutes. Determine the current utilised by the unit. The electrochemical equivalent of silve

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Determine the time needed to liberate 1.0 litre of hydrogen at STP in an electrolytic cell using a current of 5.0 A .

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Two voltameters, one containing a solution of silver salt and the other a solution of a trivalent-metal salt, are connected in series. A current of 2 A is maintained for 1.50 hours

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Two voltameters, one containing a solution of silver salt and the other a solution of a trivalent-metal salt, are connected in series. A current of 2 A is maintained for 1.50 hours

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A brass plate with a surface area of 200 cm ^2 on one side is electroplated with 0.10 mm thick silver layers on both sides using a 15 A current. Determine the time taken to complet

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As shown in the figure, a current is passed through an electrolyte of AgCl . It is observed that 2.68 g of silver is deposited on the cathode in 10 minutes. Determine the heat deve

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When connected to a silver voltameter, the potential difference across the terminals of a battery having an emf of 12 V and an internal resistance of 2 drops to 10 V . Determine th

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A plate having an area of 10 cm ^2 is to be electroplated with copper (density 9000 kg m ⁻³ ) to a thickness of 10 micrometres on both sides, utilising a 12 V cell. Determine the e

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Which of the provided plots can represent the thermal energy generated in a resistor over a given time interval as a function of the electric current?

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A constant current i is maintained in a resistor. Taking into account the temperature coefficient of resistance, select the plot in the figure that best illustrates the rate of the

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Examine the following statements about a thermocouple. (A) The neutral temperature is independent of the cold junction temperature. (B) The inversion temperature is independent of

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The heat generated in a system is directly proportional to the electric current passing through it.

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Thomson effect is caused

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Consider the two statements given below. (A) The free-electron density varies among different metals. (B) The free-electron density in a metal is dependent on temperature. The Seeb

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The Faraday constant

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Consider the following two statements. (A) Free-electron density is different in different metals. (B) Free-electron density in a metal depends on temperature. Peltier effect is ca

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An iron strip AC and a copper strip AB are connected together at A . The junction A is kept at 0^ C , while the free ends B and C are held at 100^ C . A potential difference exists

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For the silver–lead pair, the constants a and b are given as 2.50 V ^ C ⁻¹ and 0.012 V ^ C ⁻² , respectively. If a silver–lead thermocouple has its colder junction kept at 0^ C ,

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A current is passed through a combination of two resistors connected in series, both possessing equal resistances. Disregard any change in resistance due to temperature variations.

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An electrolysis experiment is halted, and the connections to the battery terminals are subsequently reversed.

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The electrochemical equivalent of a material is dependent upon

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