What is the value of the unknown voltage indicated in the picture. Assume that the wire connected to the negative terminal of the power supply is at 0 V.

Q: A color television set draws about 2.5 A when connected to a 120-V source. What is the cost (with…

A: Given data:  Current (I) = 2.5 A Voltage (V) = 120 V Cost of electricity = 8 cents/kWh Time (t) =…

Q: Why should you not connect an ammeter directly across a voltage source as shown ? (Note that script…

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Q: When a capacitor is connected to an a.c. supply the current O is in phase with the voltage O leads…

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Q: Given that This circuit runs on the flashbulb of a camera. Circuit is powered by 4 AA batteries each…

A: Total emf from the 4 batteries in series, E = 6 V (1.5V×4)capacitance of the capacitor, C =…

Q: Using the information in the image below. The current at the third resistor, R3 would be R1 R2 R3 R4…

A: According to ohm's law,                   V= IR    Here , V = potential difference.…

Q: Mel Lin, an engineering professor sets up the circ snown in the figure. The reading of the voltmeter…

A: According to ohms law -  V=IR Reading of Voltmeter and Ammeter are -  Vr=6.50 vIr=2.50 mA1 A = 1000…

Q: When a voltmeter is connected across the terminals of a resistor, what usually happens to the…

A: When voltmeter is connected across the resistor, then the potential difference across the resistor…

Q: Three identical resistors are connected to a 6V battery and a switch as shown. When the switch is…

A: I have given a detailed explanation with proof.  Please try to understand your own.  Hope it will…

Q: A charged capacitor of C-62.0 µF is connected to a resistor of R-2.8 M2 as shown in the figure. The…

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Q: 4.00 N 1.00 N A 3.00 N E2

A: Reading of Ammeter (I) = 2.60 Ampere (from right to left)R2 = 4 ohmR = 1 ohm R1 = 3 ohm E2 = 32…

Q: The switch is closed in the figure. After a long time compared to the time constant of the…

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Q: A double loop circuit is shown in the figure below. Ew 3 30 3 20 Ex The Emf Ex = 9.00 V and the Emf…

A: Let A , B and C be the magnitude of current flowing in the downwards direction in the left , middle…

Q: The algebraic sum of the potentials around any branch of a closed circuit is a) zero b) maximum c)…

A: Kirchhoff's loop law states that the algebraic sum of all the potential differences in a closed loop…

Q: R 90.0 N 10.0 N S. 10.0 N 90.0 N

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Q: At which of the labelled points is the voltage at a lower value?

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Q: Three resistors, of 40Ω ,60Ω ,and 120Ω , are connected in parallel, and this parallel group is…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to O a. r.m.s. voltage b. none of…

A: A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to

Q: When a 1-Ω resistor, a 2-Ω resistor, and a 3-Ω resistor, are connected in series to a common DC…

A: Draw the circuit diagram of the arrangement as:

Q: For a series circuit, what is the terminal voltage of a battery or power supply equal to in terms of…

A: We need to define the terminal voltage of a battery for a series circuit.

Q: 4.0 Ω resistor is connected in parallel with a 12 Ω resistor and both of these are connected to a DC…

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Q: In the circuit in the figure below, the emf equals 5.78 V and has negligible internal resistance.…

A: in this question  the circuit in the DC steady state after infinite time when the switch is open .

Q: When a voltmeter is connected across the terminals of a resistor, what usually happens to the…

A: The voltmeter is a device which is used to measure the potential difference between two points.

Q: solve the following numerical problem  A 120-Ohm resistor is in series with unknown resistor. The…

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Q: In view of the small currents that cause shock hazards and the larger currents that circuit breakers…

A: Fuses and circuit breakers work on the principle of heating of electric current.

Q: In a parallel electrical circuit, the same current flows through each component, whereas the…

A: A circuit in parallel connection has two or more ways for current to flow through the circuit.

Q: Why does the total emf of dry cells in series not equal the reading in the voltmeter?

A: The electromotive force is the measure of energy that is given to each coulomb of charge, whereas…

Q: A 100-Ω resistor is connected across the terminals of a DC source. The 100-Ω resistor consumes 0.794…

A: The circuit diagram for the mentioned arrangement be:

Q: he smallest current passes through which resistor(s)? A) the 10-ohm resistor b) the 20-ohm…

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Q: What happens to the current as the resistors are added in a.  series b. parallel

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Q: Why there is a phase shift between the measured voltage VL and current I ?

A: There is a phase shift of 90° between inductive voltage and current .

Q: Some household appliances have plugs with two prongs while others have three prongs. The additional…

A: GIven statement : Some household appliances have plugs with two prongs while others have three…

Q: A 35 volt battery is connected purely in series in parallel or in series to three resistors. Two…

A: Given battery voltage V = 35 V two resistor of 3 ohm and 17 ohm and third is unknown   Equivalent…

Q: Consider the circuit shown in the figure. Note that two currents are shown. Calculate the emfs E1…

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Q: The diagram below shows a small water heater that uses electrical energy to heat water. The heating…

A: Emf  E = 20 V Rload =5.0 ohm Rs = 2.0 ohm

Q: In the circuit in the figure below, the emf equals 5.99 V and has negligible internal resistance.…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: When we apply the loop rule (also called "Kirchhoff's loop rule") in electric circuits then when we…

A: When we move from positive to negative terminal in loop then we are moving higher emf to lower emf…

Q: What is true in general about the voltage (potential) supplied by the battery compared with the drop…

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Q: Why is the terminal voltage less than the emf?

A: An emf of a cell is defined as work done in bringing unit positive charge from negative terminal to…