An 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?
Download our app for free and get started
P = 10W, V = 220V, I = 5A
We know that
P = VI
= 220 X 5
P = 1100W
Power of one bulb = 10W
Total no. of bulbs that can be connected $=\frac{1100}{10}=110$
We know that
P = VI
= 220 X 5
P = 1100W
Power of one bulb = 10W
Total no. of bulbs that can be connected $=\frac{1100}{10}=110$
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
- 1Calculate the resistance of a copper wire 1.0km long and 0.50mm diameter if the resistivity of copper is $1.7\times10\Omega\ \text{m}.$View Solution
- 2View SolutionA p.d. of 10V is needed to make a current of 0.02A flow through a wire. What p.d. is needed to make a current of 250mA flow through the same wire?
- 3View SolutionGive three reasons why different electrical appliances in a domestic circuit are connected in parallel.
- 4View SolutionWhat is the resistance between A and B in the figure given below?
- 5The electrical resistivities of five substances A, B, C, D and E are given below:View Solution
$\begin{matrix}\text{B}&110\times10^{-8}\Omega\text{ m}\\\text{C}&2.60\times10^{-8}\Omega\text{ m}\\\text{D}&10.0\times10^{-8}\Omega\text{ m}\\\text{E}&1.70\times10^{-8}\Omega\text{ m}\end{matrix}$ - 6With 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 $A$
- 7A piece of wire of resistance $20 Ω$ is drawn out so that its length is increased to twice its original length. Calculate the resistance of the wire in the new situation.View Solution
- 8When 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.
- 9How will you connect three resistors of resistances $2Ω, 3Ω$ and $6Ω $ obtain a total n si stance of:View Solution
- $4 Ω,$
- $1Ω$
- 10View SolutionWhich uses more energy: a 250W TV set in 1 hour or a 1200W to aster in 10 minutes?