What is the ratio of the resistance if two bulbs have ratings 40W 220v and 20w 110v?

The ratio of their resistance is 4.

What is the resistance of a bulb of 40 watt connected in a line of 220 volt?

1210 ohm
Thus, the resistance of the 40 W bulb is 1210 ohm.

When two bulbs A and B are rated 40 W and 60 W respectively operating 220 V mention the bulb which has high resistance?

Given, two electrical bulbs. i.e., R ∝ 1/P. Resistance is inversely proportional to power. Therefore, the first bulb having lesser power has higher resistance.

Which one is having lesser resistance a 220V 60w bulb or a 220V 40w bulb?

Answer: 60w is having lesser resistence.

What is the resistance of a bulb having rating 40w and 230 V when in condition?

The rated resistance for the bulb is 1322.5 ohm.

What type of light bulb should I use with 220V AC?

An incandescent bulb will do fine. The 220 V AC is the RMS value, for Root Mean Square. The sine’s amplitude will be higher than that, or 310 V. But the RMS value tells you what equivalent DC voltage you would need to get the same power, so that’s exactly what you need. The bulb will use the same power and light as bright under 220 V AC as DC.

What happens if you turn on a light bulb with 220?

The bulb will use the same power and light as bright under 220 V AC as DC. Switching on an incandescent bulb may cause a large current peak: the cold resistance is only about a tenth of what it is when the lamp is lit, and when the voltage applied is high at that time the lamp may break.

What is the difference between 40W and 100W bulbs?

ANSWER:- 40W will glow brighter than 100W. U will get higher resistance value for low rated bulb. Since, Bulbs are connected in series And current in series remains same, so brightness will be directly proportional to (I^2)*R. Hence bulb of lower rating will be more brighter for series connection.

What is the difference between 220V AC and 220V DC?

The 220 V AC is the RMS value, for Root Mean Square. The sine’s amplitude will be \\$\\sqrt{2}\\$ higher than that, or 310 V. But the RMS value tells you what equivalent DC voltage you would need to get the same power, so that’s exactly what you need. The bulb will use the same power and light as bright under 220 V AC as DC.