Carbon-zinc dry cells (sometimes referred to as non- alkaline cells) have an emf of 1.54 V, and they are produced as single cells or in various combinations to form other voltages. (a) How many 1.54-V cells are needed to make the common 9-V battery used in many small electronic devices?  (b) What is the actual emf of the approximately 9-V battery? (c) Discuss how internal resistance in the series connection of cells will affect the terminal voltage of this approximately 9-V battery.

Q: A teapot with a surface area of 715 cm is to be plated with silver. It is attached to the negative…

A: Surface area (A) = 715 cm2Potential difference of the battery (V) = 12 volts Resistance (R) = 1.5…

Q: 15.0 (2 10.0 Q 20.0 Q 40.0 V イ介介分 16.0 Q

A: Given Data : The voltage of the battery is given as V = 40V The above-shown circuit has 2 resistors…

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A: EMF of battery  V = 30 V R= 1.6 ohm 3 resistors of resistance in parallel are - 9.7 ohm

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A: Equate the resistance of copper and tungsten

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Q: kINDLY ANSWER THIS IMMEDIATELY, THANKYOU FOR HELPING OUT :) A storage battery has an emf of 25 V and…

A: The fall of a potential V across resistance r having current I is given as V=Ir .

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A: Write the variable with the given values.

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A: EMF of a battery is the voltage it supplies at constant rate when it is connected to a resistance.

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.