A potential difference of 2.80 V exists across a light-emitting diode (LED). If the LED consumes 42.0 J of energy, what amount of charge flowed through it?

Q: The cathode of an electrolysis cell contains (ml75) an internal solution of (0.1 M) of copper ions…

A: the theoretical standard cell potential for the zinc-copper cell is 1.10 volts. potential of Zn…

Q: A current of 0.5 A exists in a 60-ohm lamp. The applied potential difference is:  A. 15 V B. 30 V C.…

A: Given data:  Current (I) = 0.5 A Resistance (R) = 60 ohm Required: Potential difference (V)

Q: Air isn’t a perfect electric insulator, but it has a very high resistivity. Dry air has a…

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Q: A charge of 4.00 C of charge passes through a pocket calculator’s solar cells in 4.00 h. What is the…

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Q: If the current 4 = 3 A, use the potential difference Vab to determine the value of the current l2.…

A: Consider the given circuit diagram.

Q: Chapter27-question15 A 34.5-m length of copper wire at 20.0°C has a radius of 0.25 mm. If the wire…

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Q: 6. If the current I₁ = 3 A, use the potential difference Vab to determine the value of the current…

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Q: If the density and atomic mass of copper are respectively 8.80 x 103 kg/m³ and 63.5 kg/kmol (note…

A: Solution: given that density = 8.8x103 kg/m3 atomic mass = 63.5 kg/kmol one free electron per copper…

Q: What would the Hall voltage be (in µV) if a 2.40 T field is applied across a 14-gauge copper wire…

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Q: In Fig. 1, Vab =11.6 V, C1 =2.54 µF, C2 = 3.89 µF, and C3 = 7.49 (16) µF. The voltage across C3 is…

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Q: Two resistors are connected to a battery of ɛ=36 V as shown in the figure. Find the ratio I1/13. R.…

A: Ohm's law gives us, if the voltage difference across a resistance R is V then the current through…

Q: A current of 4.82 A exists in a 12.4-2 resistor for 4.60 min. (a) How much charge and (b) how many…

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Q: The resistivity of a 1.0 m long wire is 1.72 x 10*8 Qm and its cross sectional area is 2.0 x 10-6…

A: The resistance is given by  R = ρLA where, L is the length and A is the area and ρ is the…

Q: The minimum of input voltage required for regulation to be established in Figure below. with…

A: CONCEPT:

Q: Voltage (V) 2 M -2 -3.0 37.5 50.0 12.5 25.0 Time (s) What is its root-mean-square voltage? O A. 2.1…

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Q: At what temperature (in Celsius) will aluminum have a resistivity that is three times the…

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Q: Find the current in each of the resistors using Kirchhoff's Laws R = 3.00 N R3 = 3.00 N %3D %3D a b…

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Q: busbar made out of copper has a length of 12 inches. Its surface dimension is 1 cm by 1 cm. If the…

A: Given values:-  Length of copper,(L)=12 inch=12 x 0.0254 m=0.3048 m ----(1) [Using 1 inch=0.0254 m]…

Q: To measure IR3, the ammeter should be connected at terminals: 4 5 1 2 3 78 R1 10 11, www. R2 R3 R4 6…

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Q: 12. How many electrons pass by a point every second if a 0.400-amp current is flowing? (e = -1.602 x…

A: Given, Current I = 0.400 A Time t = 5 seconds e = -1.6 x 10-19 C   We know the expression for Charge…

Q: If 2.6 x 10^18 electrons and 7.3 x 10^18 protons move in the same directions past a given…

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Q: 6. If the current I₁ = 3 A, use the potential difference Vab to determine the value of the current…

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Q: The number of electrons per unit volume in gold is 6x10 e/m. The resistivity of gold is 2.5×10 *Am.…

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Q: Find i, v, and the power dissipated in the 6-2 resistor in Fig. 2.90. 2.26 8Ω 9 A 4 2

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Q: In the shown figure, find the power (in W) dissipated in the 2R-resistor if e= 60 V and R= 3.02. www…

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Q: The charge entering the element is q(t) = -30e^(-4t) mC. If the voltage across the element is…

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Q: What would the Hall voltage be (in µV) if a 2.40 T field is applied across a 13-gauge copper wire…

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Q: A length of metal wire has a radius of 5.00 × 10−3 m and a resistance of 0.100 Ω. When the potential…

A: The radius of metal wire,

Q: An electric device draws 6.5 A at 240 V. If the voltage drops by 15%, what will be the new current?…

A: Given: Current, I=6.5 A Potential, V=240 V Voltage drop=15%=0.15  We know, OHM'S LAW: V=IR At…

Q: 2.00 Ω 10.00 V a 3.00 N а 1.00 N 5.00 V. 4.00 N 5. Find the current in each branch and the potential…

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Q: A silver wire 2.6 mm in diameter transfers a charge of 420 C in 80 min. Silver contains 5.8x102 free…

A: diameter of wire=2.6mm Free electron per meter cube=5.8 x 1028electrons

Q: If 5.0 × 10" electrons pass through a 20 N resistor in difference across the resistor? 3. 21 V b. 32…

A: Given: The number of electrons is 5x1021. The time interval is 10 min. The resistance of the…

Q: What is the current in the 15- W resistor when E= 9.0 V? 20 2 15 2 30 2

A: Given that the battery has voltage E =9 V. Here 15 ohm and 30 ohm are parallel. So, the equivalent…

Q: An isolated conducting sphere has a 10 cm radius. One wire carries a current of 1.000 002 0 A into…

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Q: Two 2.0cm x 2.0cm metal electrodes are spaced 1.4 mm apart and connected by wires to the terminals…

A: Given,9.0 V dimension of ht electrodes, 2.0 cm ×2.0 cm separated by a distance, d = 1.4 mm connected…

Q: A wire is 1.3 m long and 0.97 mm2 in cross-sectional area. It carries a current of 5.0 A when a 1.6…

A: Write the provided values with suitable variable.

Q: In Kirchoff's experiment, If we measure l = 0.2 mA, I2 = 0.3 mA, and R = R2 = R3 = 5000 Ohm then the…

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Q: A strip of doped silicon 260.0 um wide contains 8.80 × 1022 conduction electrons per cubic meter and…

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Q: The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A…

A: The discharging current in the atmosphere due to small conductivity of air is given to be 1800 A on…

Q: A length of metal wire has a radius of 0.004 m and a resistance of 0.11 2. When the potential…

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Q: At node 2, in the circuit below, Applying KCL gives: (use current directions at node 2) 2 A 4Ω v2 2.…

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Q: Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper…

A: Given data The magnitude of the current is I = 1.1 A The diameter of the copper wire is d = 1 mm = 1…

Q: A conductor has a cross-sectional area of 2.3x 10-6 m² and the number of free electrons per unit…

A: Given data: The area of conductor is A=2.3x10-6 m2. The free electrons are n=8.5x1028 e/m3. The…

Q: What potential difference must be applied across a 5 Ω resistor in order that the resulting current…

A: Given, Resistance (R) = 5 ohm Current (I) = 0.50 A

Q: An electric device draws 6.5 A at 240 V. If the voltage drops by 15%, what will be the new current?…

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Q: nas a area of 2.3x10-6 m² and the number of free electrons per unit volume is 8.5×1028 electron/m³.…

A: Formula of drift velocity is as follows: vd=IneA…

Q: The earth’s surface has a negative surface charge density of 10-9 C m-2. The potential difference of…

A: It is given that,

Q: For the circuit shown, find the current flows through the 3.00 Nand 4.00 N resistors. 3.00 2 6.00 V'…

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Q: A 9v battery passes 1 mA current through a circuit for 10 minutes. what work was done by the batter…

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Q: A silver wire of radius r= 0.5 mm and resistance 0.06 Q is connected to a voltage source of 4.6 mV.…

A: Given, Radius r = 0.5 mm = 0.005 m Resistance R = 0.06 Ω Voltage V = 4.6 mV = 4.6 x 10-3 V density…

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.