75 : The potentiometer wire has length 4 m and some resistance. The resistance connected in series with the wire and accumulator of e.m.f. 2 V is 16 N. If the potential gradient along the wire is 10-3 V/cm. Find the resistance of potentiometer wire Neglect internal resistance.

Q: 8. There is a potential difference of V = 20 V across a resistor with R= 50 N. What is the current…

A: Given data:      Voltage, V = 20V       Resistor, R = 50Ω

Q: 1. Consider the circuit shown below. Let ɛ = 36 V, Rị = 4.8 N, R, = 7.2 N, and R3 = 14.4 N. (a) What…

A: Combination of parallel resistance  RAB = 4.8×7.2×14.4/(4.8×7.2 + 7.2×14.4 + 4.8 ×14.4) RAB = 2.4Ω

Q: 8- The voltage on the 2 Q resistor is 12V for the circuit in the figure. Find the current passing…

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Q: If 0.050 A of current flows across the 300 ohms resistor, what is the voltage drop in 100-ohms…

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Q: 15.Sketch I-V graphs for the following cases and identify which graph corresponds to which type of…

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Q: Two point charges of +2.0 µC and – 1.0 µC are 10 cm apart. The electrical force between them is?…

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Q: 8-A 5.0 n resistance is required to be made from a copper wire with a cross section of 0.1 mm. The…

A: R = 5nΩ; Crross section = 0.1mm; V = 116 V; ρCu = 1.70 x 10-8  Ω.m

Q: 7. Consider two (1 and 2) silver wires both of which have constant circular cross sec- tional areas…

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Q: 48.30 53.20 26.30 130 77.3V 53.30 0687

A: Using mesh analysisThe 48.3 ohm and 53.2 ohm are in series.Rs=48.3+53.2 =101.5 ohmThe 13 ohm, 53.3…

Q: 7. Find the electric potential of a charge q with 491 nC and distance of 200 cm 8. What Fuse should…

A: The electric  potential  is given by= kq¹/r Where r =distance of point from the charge q¹ U

Q: 0. Determine the temperature at which the resistance of an aluminum wire will be twice its value at…

A: The final resistance of the alumunium is twice of the resistance of aluminium at 20oC. The…

Q: Rz =3,002 Ri =4.00r ; R- 3.002 = R, = 4,0ar Ei=10,0V %3D Ez=26,0V The ciruit shown in the fiqure…

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Q: 1. f both the diameter of a wire and its length are quadrupled, what will happen to its resistance?…

A: Formula of resistance:    R=ρLA=ρLπd24  ∴   R∝Ld2

Q: 4. Wire A and B are made of the same material and have the same length. However, the diameter of…

A: Given : da = 3 db  Ra = 12 ohm

Q: 1. Resistance in metal wire arises because: a. The electrons are moving randomly b. There are…

A: 1. When electrons move through the metal wire some electrons collide with atoms, other electrons, or…

Q: 7-An emf source with = 100 V, a resistor with resistance R = 90.0 S2, and a capacitor with…

A: For an RC series circuit  Vc(t) = Vs*(1-e-tRC)           ....(1)and ic(t) = VsRe-tRC…

Q: Two wires, A and B, are made from the same material. The length of A is twice the length of B, and…

A: The resistance is given  by the formula.R=ρlAWhere, l is length of the conductorA is cross section…

Q: 69 : A cell e.m.f. 2 volt and negligible internal resistance is connected to potentiometer wire of…

A: To Find: Potential gradient VL Given Data: E.m.f. of cell (E) = 2 V Length of potentiometer wire (L)…

Q: 14. Calculate the ratio of voltage across to the current flowing through for the battery. bat=[8V I…

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Q: A certain resistor has a resistance of 1.234 Ω at 20oC and a resistance of 1.617 Ω at 42oC. What is…

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Q: Two wires of the same material and with the same length have different diameters. Wire A has twice…

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Q: 2. Calculate the equivalent resistance of the resistor. All the resistors have the same resistance…

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Q: 2. Two cells each of e.m.f 1.8V and internal resistance 0.5 ohms pass a current through a 2ohms…

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Q: 7. A 2nF capacitor with an initial charge of 5µ Cis discharged through a 2kM resistor. What is the…

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Q: 4. Consider the power dissipated by a resistor, P=I°R . Suppose we have a current of 1 amp and a…

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Q: 4. The resistance of a resistor changes with temperature; the equation is given as: R= a T^2 + bT+…

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Q: A wire with a temperature coefficient of resistance (a = 0.0075/°C) has a resistance of 6.28 2 at…

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Q: 3. A total resistance of 3 ohm must be produced by combining an unknown resistor R with a 12 ohm…

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Q: 2. In Fig 2, Find the current in each resistor and the potential difference between a and b. R1 100…

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Q: 6. If the potential difference across a resistor is doubled, the resistance is also doubled. A.True…

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Q: 3. Three resistors, 10, 20, and 30 Q, are connected in parallel. What is the equivalent resistance?…

A: Ohm's law gave an important relationship relating the voltage and the current in the circuit. The…

Q: 1. Calculate the voltage across R1. 2. Calculate the current across R2. 3. Calculate the total…

A: Voltage supplied (V)=12 V Resistances (R1)=4 Ω and (R2)=3 Ω

Q: These currents are given, 2A, 3A and 5A as shown in the figure. Find the current in 3Ω resistor, the…

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Q: Directions: Choose the letter of your answer. 1. If the diameter of a wire is reduced to one half…

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Q: Resistivity of silver is less than that of tungsten. If a tungsten wire and a silver wire are having…

A: Resistivity of silver < Resistivity of tungsten Length and Area of silver wire = Length and Area…

Q: Consider the circuit shown below. 30 60 80 24V a. Calculate the equivalent resistance of the system.…

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Q: 7. Lightning discharges and lightning occur when charges are separated at different heights in the…

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Q: . The maximum power consumption of an air fryer is 1500 W. If it is connected to a 220-V line, (a)…

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Q: 59 : A potentiometer wire has a length of 4 m and a resistance of 10 Q. The wire is connected to a…

A: To Find: 1) Potential drop per unit length 2) Balancing length Given Data: L=4 m,R=10 ΩE=4 Vr=2…

Q: Q5) When applying a voltage of (100 mv) across a wire of length (20m), the current density passing…

A: Given Data, Applied Voltage(V)=100 mV Length of the wire (L)=20 m Current Density of the wire…

Q: 12. A lightbulb uses 4 A when it is connected across a 120 V source. What is the resistance in the…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…