Domestic Electric Circuits and Modern Electric Appliances

An electric bulb is rated as $5 \mathrm{W}, 110 \mathrm{V}$. How many of these bulbs can be connected in parallel across the two wires of $110 \mathrm{V}$ supply line if the maximum current which can be drawn is $5 \mathrm{A}$?

How many $60 \mathrm{W}$ bulbs may be safely run on $220 \mathrm{V}$ using a $5 \mathrm{A}$ fuse?

LEDs are cost-efficient and energy efficient.

In comparison with the fluorescent light, the LED bulbs have significantly low power requirement.

What are the merits of an LED bulb?

Explain why LED is better than tubelight and incandescent light bulb?

What are the important components of the main-box?

List some devices where seven segment display is used.

A 'Seven Segment Display' is the display device used to give an output in the form of numbers or text.

Seven segment display form the digit $8$.

Draw the diagram for 'Seven segment display'.

Write a short note 'Seven segment display'.

Write a short note on LED televisions.

LED television uses less power and consumes very less energy.

List some advantages of LED television.

If the power of a motor is $40 \mathrm{kW}$, at what speed can it raise a load of $20,000 \mathrm{N}$?

A magnetic crane raises a load of $400 \mathrm{kg}$ to a height of $10 \mathrm{m}$ in one minute. Calculate the power of the crane in kilowatts upto four decimal points. ($g = 9.8 \mathrm{m}/{\mathrm{s}}^2$)

The rate at which energy is delivered by a current is the _____of the appliance.

At the time of the short circuit, the current in the circuit_____________.

If the live wire and neutral wire come in contact either directly or via conducting wire, then it is called _____.