In the circuit shown below, the voltmeter reads $10V.$
- What is the combined resistance?
- What current flows?
- What is the p.d. across $ 2 Ω$ resistor?
- What is the p.d. across $3 Ω$ resistor?
Download our app for free and get started
$I = 6V$
$\text{R}_1=2\Omega,\text{R}_2=3\Omega$
Combined resistance, $R_{tot} = 2 + 3 = 5$
$\text{I}=\frac{\text{V}}{\text{R}_\text{tot}}=\frac{10}{5}=2\text{A}$
p.d. across $2\Omega$ resistor $= I \times R_1 = 2 \times 2 = 4V.$
p.d. across $3\Omega$ resistor $= I \times R_2 = 2 \times 3 = 6V.$
$\text{R}_1=2\Omega,\text{R}_2=3\Omega$
Combined resistance, $R_{tot} = 2 + 3 = 5$
$\text{I}=\frac{\text{V}}{\text{R}_\text{tot}}=\frac{10}{5}=2\text{A}$
p.d. across $2\Omega$ resistor $= I \times R_1 = 2 \times 2 = 4V.$
p.d. across $3\Omega$ resistor $= I \times R_2 = 2 \times 3 = 6V.$
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
- 1What possible values of resultant resistance one can get by combining two resistances, one of value $2$ ohm and the other $6$ ohm?View Solution
- 2View SolutionGive three reasons why different electrical appliances in a domestic circuit are connected in parallel.
- 3View SolutionAn electric bulb is rated as 10W, 220V. How many of these bulbs can be connected in parallel across the two wires of 220V supply line if the maximum current which can be drawn is 5A?
- 4Calculate 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
- 5What will be the resistance of a metal wire of length $2$ metres and area of cross-section $1.55 \times 10m $, if the resistivity of the metal be $2.8 \times 10 m?$View Solution
- 6An electric iron is connected to the mains power supply of $220V$. When the electric iron is adjusted at ‘minimum heating’ it consumes a power of $360W$ but at ‘maximum heating’ it takes a power of $840W$. Calculate the current and resistance in each case.View Solution
- 7View SolutionState and explain Joule’s law of heating.
- 8View SolutionCalculate the cost of operating a heater of 500W for 20hours at the rate of? ₹3.90 per unit.
- 9The electrical resistivities of four materials P, Q, R and S are given below:View Solution
$\begin{matrix}\text{P}&6.84\times10^{-8}\Omega\text{m}\\\text{Q}&1.70\times10^{-8}\Omega\text{m}\\\text{R}&1.0\times10^{15}\Omega\text{m}\\\text{S}&11.0\times10^{-7}\Omega\text{m}\end{matrix}$
Which material will you use for making:- Heating element of electric iron.
- Connecting wires of electric iron.
- Covering of connecting wires?
- 10View SolutionWhat is an ammeter? How is it connected in a circuit? Draw a diagram to illustrate your answer.