AB is a potentiometer wire of resistance 1 Ω being used to measure a small voltage...

AB is a potentiometer wire of resistance 1 Ω being used to measure a small voltage of 2/3 mV. The cell has an emf of 2 V and negligible internal resistance. For the balance point to be 2/3 (two thirds) of the way along the slidewire, as shown, the value of R in ohms must be:

Expert Solution

genius_generous answered 2 years ago

Nichrome wire is used in some radiative heaters. (a) Find the resistance (in Ω) needed if...

Nichrome wire is used in some radiative heaters. (a) Find the resistance (in Ω) needed if the average power output is to be 1.05 kW utilizing 120 V AC. Ω (b) What length (in m) of Nichrome wire, having a cross-sectional area of 5.00 mm2, is needed if the operating temperature is 500°C? m (c) What power (in kW) will it draw when first switched on? kW

A motor has coils with a resistance of 26 Ω and operates from a voltage of...

A motor has coils with a resistance of 26 Ω and operates from a voltage of 244 V. When the motor is operating at its maximum speed, the back emf is 146 V. (a) Find the current in the coils when the motor is first turned on. (b) Find the current in the coils when the motor has reached maximum speed. (c) If the current in the motor were 7.0 A at some instant, what is the back emf at that time?

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A circular wire loop of radius r = 0.25 m and resistance R = 11.1 Ω...

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The 15 Ω resistance copper wire was cut into 5 equal parts and wound from them....

The 15 Ω resistance copper wire was cut into 5 equal parts and wound from them. Calculate the rope resistance.

GDP is often used as a measure of well-being. Is it a reasonable measure of well-being?...

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The resistance of a very fine aluminum wire with a 10 μm × 10 μm square cross section is 1200 Ω

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The resistance of a very fine aluminum wire with a 10 μm × 10 μm square cross section is 1200 Ω .

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The very high internal resistance of digital multimeters, in their voltage-measuring ranges, can be used to...

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An RC circuit with a 1-Ω resistor and a 0.000001-F capacitor is driven by a voltage...

An RC circuit with a 1-Ω resistor and a 0.000001-F capacitor is driven by a voltage E(t)=sin 100 t V. If the initial capacitor voltage is zero, determine the subsequent resistor and capacitor voltages and the current.

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