Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

Two bulbs having power 40W and 60W intended to operate at 120V. Which bulb is brighter? explain for both series and parallel circuits

Two bulbs having power 40W and 60W intended to operate at 120V. Which bulb is brighter? explain for both series and parallel circuits

Grade:12th pass

1 Answers

Arun
25763 Points
3 years ago
The 40W bulb will glow brighter than the 60W bulb.Any light bulb is given a wattage at the voltage at which it is going to be used(which is usually fixed at 110V or 220V depending on the region).Its wattage depends on the resistance of the filament in the bulb as P=(V^2)/R , hence R for a 40W bulb is 1.5 times that of a 60W bulb.The power output by a light bulb(or in fact any appliance with only resistance) is (I^2)*R . Since both the bulbs are in series, the same current flows through them. But the resistance of the 40W bulb is higher than the 60W watt bulb, Hence the power output by the 40W bulb will be higher than the 60W bulb in this case.Hence the 40W bulb will glow brighter in this case.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free