Show how you would connect two 4 ohm resistors to produce a combined resistance of:
- 2 ohms.
- 8 ohms.
Download our app for free and get started
By connecting in parallel: Since equivalent resistance will be
$\frac{1}{\text{R}}=\frac{1}{4}+\frac{1}{4}=\frac{2}{4}=\frac{1}{2}$
Therefore. R = 2 ohm
By connecting in series: since equilaent resistance will be R = 4 ohm + 4 ohm = 8 ohm.
$\frac{1}{\text{R}}=\frac{1}{4}+\frac{1}{4}=\frac{2}{4}=\frac{1}{2}$
Therefore. R = 2 ohm
By connecting in series: since equilaent resistance will be R = 4 ohm + 4 ohm = 8 ohm.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionA resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X?
- 2View SolutionCalculate the cost of operating a heater of 500W for 20hours at the rate of? ₹3.90 per unit.
- 3With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. In the circuit diagram shown below, find:View Solution
- Total resistance.
- Current shown by the ammeter $A$
- 4When a current of $4.0A$ passes through a certain resistor for $10$ minutes,$ 2.88 \times 10J$ of heat are produced. Calculate:View Solution
- The power of the resistor.
- The voltage across the resistor.
- 5Calculate the resistance of an aluminium cable of length $10\ km$ and diameter $2.0\ mm$ if the resistivity of aluminium is $2.7\times10 Ω\ \text{m}.$View Solution
- 6View SolutionWhat is an ammeter? How is it connected in a circuit? Draw a diagram to illustrate your answer.
- 7The resistors $R_1 , R_2 , R_3$ and $R_4$ in the figure given below are all equal in value.View Solution
What would you expect the voltmeters $A, B$ and $C$ to read assuming that the connecting wires in the circuit have negligible resistance? - 8Calculate the area of cross-section of a wire if its length is 1.0m, its resistance is $23 Ω$ and the resistivity of the material of the wire is $1.84\times10 Ω\ \text{m}.$View Solution
- 9Two resistances when connected in parallel give resultant value of $2$ ohm; when connected in series the value becomes $9$ ohm. Calculate the value of each resistance.View Solution
- 10View SolutionHow does the resistance of a conductor depend on:
- Length of the conductor?
- Area of cross-section of the conductor?
- Temperature of the conductor?