a resistor of 3 ohms and an unknown resistor are connected in series. the total resistance of the whole circuit is measured to be 9 ohs.  what is the resistance of the unknown resistor (in ohm)?

Q: A 300-volt electromotive force is applied to an RC-series circuit in which the resistance is 500…

A: Voltage = 300 v  Resistance R = 500 ohm  Capacitance c = 5 micro frade

Q: If two resistors with resistances R1 and R2 are connected in parallel, then the total resistance R,…

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Q: The potential difference across a resistor in a particular electric circuit is 420 V. The current…

A: Potential difference across a resistor (V) = 420 volts Current through the resistor (i) = 17 A

Q: What is the total resistance of two resistors, R1 = 4.6 Ω and R2 = 7.9 Ω when they are connected in…

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Q: The potential difference across a resistor in a particular electric circuit is 300 V. The current…

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Q: The potential difference across a resistor in a particular electric circuit is 360 V. The current…

A: Given data: Potential difference ∆V=360 V Current (I) = 18 A Need to determine the resistance of the…

Q: The voltage across a resistance R6 in the circuit of Figure is to be measured by a voltmeter…

A: Given that:- Electric circuit is given in the question.

Q: The resistance of a wire is ohm. (Round your answer to the nearest ten-thousandth.)

A: Here length of the wire  is constant and and material of wire is same  therefore resistivity of wire…

Q: The amount of charge flowing through a particular conducting wire is represented by the equation q…

A: charge through a wire is given by :q(t) = at3 + bt2 + c a = 5 A/s2b = 3 A/s At t= 0.9 seconds ,…

Q: One wire in a high-voltage transmission line carries 1 000 A starting at 700 kV for a distance of…

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Q: A 5-meter-long conductor with diameter of 5mm is connected to a source and an external resistance.…

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Q: The voltage in a circuit was measured with varying resistance for 5 trials. The data is shown in the…

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Q: In a circuit, the potential drop across the 10 resistor is 100 V. What is the current through the…

A: Given, Resistance of the circuit, R = 10 Ωpotential drop across the resistor, V = 100 V

Q: What is the minimum number of 88@Ω resistors that must beconnected in parallel to produce an…

A: When all the resistors are connected in parallel, the expression for calculate resistance is…

Q: A wire has a diameter of 1.0 mm and a length of 30 m, and is found to have a resistance of 1.2 Ω.…

A: The area of the wire is, A=πr2=πd24=3.141.0 mm10-3 m1 mm24=7.85×10-7 m2

Q: What is the resistance (in units of Q) of a wire made of a material with a resistivity of 3.2 x 10-8…

A: Given: The resistivity is ρ=3.2×10-8 Ωm. The length is L=10.6 m. The diameter is d=0.50 mm. The…

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Q: A 10.0 V battery is connected across two resistors in series. If the resistods have resistances of…

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Q: A battery has an emf of 3V and an internal resistance of 2 ohms. If a wire with resistance R is…

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Q: A conductor whose diameter is 5mm has a resistance of 1.5ohm. The wire is drawn through a series of…

A: The expression for length is calculated as, A1L1=A2L2πD124L1=πD224L2D12L1=D22L2L2=D1D22L1 Substitute…

Q: A circuit with number of resistors connected in series and parallel connection with a supply DC…

A: According to question--- Given data---- All values given in circuit.  We have to find--- What is…

Q: Several resistors in a circuit have a theoretical combined resistance of 107 ohms. When the…

A: Given data: Theoretical value of resistance Rth = 107 ohms Measured value of resistance Rm = 99 ohms…

Q: An electrical circuit contains a capacitor of 52 picofarads and a resistor of 1344 ohms. If the…

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Q: The potential difference across a resistor is 4.4 * 10 ^ 2 V If the resistance of the resistor is…

A: Given data: Potential difference V =4.4×102 V Resistance of the resistor R=1.8kΩ=1.8×103Ω

Q: In a circuit, the potential drop across the 100 Ω resistors is 100 V. What is the current through…

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Q: A 20-meter length of wire with a diameter of 3.0 mm is found to have a resistance of 3.12 ohms. What…

A: The resistivity of the wire. given, diameter(d)= 3.0 mmor , radiusr=1.5 mm=1.5×10-3 mresistancer…

Q: The reciprocal of the combined resistance R of two esistances R1 and R2 connected in parallel is…

A: Given data:  The resistances R1 and R2 Equivalent resistance of parallel combination = 10.0 Ω…

Q: A capacitor of capacitance C = 1 µF is connected in series to a resistor of resistance R = 10 MN and…

A: Given: capacitance of capacitor, C = 1 μF = 10-6 F Resistance of resistor, R = 10 MΩ = 10 × 106 Ω…

Q: A resistor with an unknown resistance is connected in parallel to a 17 Ω resistor. When both…

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Q: An RC circuit takes t = 1.58 s to charge to 45% when a voltage of ΔV = 5.5 V is applied.  If the…

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Q: The charge on a capacitor in a circuit is modeled as Q(t) = Qmax cos (ωt + ϕ). What is the current…

A: It is known that current is defined as rate of flow of charge through a circuit . So, when a charged…

Q: 40µF 30µF 20µF 30uF 7.5 V •What is the equivalent capacitance? • What is the charge of the circuit?…

A: 40 µF and 20 µF capacitors are in parallel therefore there equivalent capacitance can be calculated…

Q: A resistor is placed in a circuit with an adjustable voltage source. The voltage across and the…

A: Given data:  Graph between voltage and current Required: The resistance (R)

Q: 4. 12 32 12 V 6 V

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Q: For the circuit shown in Figure, take R 1=1 Ω, R 2= 1.0 Ω, R 3=3 Ω, R 4= 12 Ω and ε 1= 9 V, ε 2= 4…

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Q: If a cell’s diameter is reduced by 50% without changing the membrane thickness, how do the…

A: When diameter is decreased,the area decreases. Given that the thickness is constant. The resistance…

Q: If a cell’s membrane thickness doubles but the cell stays the same size, how do the resistance and…

A: Resistance is given by R=ρlA where ρ=Resistivityl=Length of resitorA=Area of resistor Here the…

Q: 1. 1/R = 1 /R1 + 1/ R2 is the equation for the total resistance R when resistances R1 and R2 are in…

A: Rewrite the expression for the total resistance. Substitute the known values and solve for…

Q: The unloaded terminal voltage of a battery is 4 V. The internal resistance of the battery is 3 Ω. If…

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Q: What is the total resistance of a circuit if 3 resistors, R1 = 91 ohms, R2 = 66 ohms, R3 = 44 ohms,…

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Q: In the given circuit, find (a) the current through the 8.0ohm resistor and (b) the total rate of…

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

Q: What are the expected readings of the ammeter and voltmeter for the circuit in the figure below? (R…

A: The circuit diagram is given  R = 9.40 Ω ΔV = 6.10 V To find = Expected readings of voltmeter and…

Q: What is the voltage drop across R, in the circuit below if the shown resistances have the following…

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Q: What is the resistivity of a wire of 1.0 mm diameter, 2.0 m length, and 50 m resistance?

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Q: A capacitor with capacitance C = 2.5 μF is charged to a voltage V = 5V. It is then discharged…

A: C = 2.5 μF V = 5 volts R = 100 ohm

Q: Three resistors A, B and C are connected in series to a 120-V supply. If the resistor A = 50 Ω and…

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Q: An electrical engineer wants to have a copper wire with resistance equal to 5 ohms. If the wire has…

A: Given, Resistance = 5 ohms Radius = 1 mm

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.