ICSE − Q & A

why can't d.c  electricity be used for transformers?

+ 3 more questions by qwerty6699  

Energy conversion in a thermocouple? Light to electrical or heat to electrical??
asked by Qwerty (qwerty6699) 7 years ago
1

how is the loudness affected if the amplitude is halved?
asked by Qwerty (qwerty6699) 7 years ago
5

A block weighing 20kgf is pulled up a slope at a constant speed by a constant force of 150 N.(g=10m/s2) Calculate : i) The work done by the force in moving along the slope ii)The increase in the potential energy of the body. iii)The amount of energy dissipated in pulling up the body along the slope. Show the working please
asked by Qwerty (qwerty6699) 7 years ago
1

A Important question for you all
Write two difference between concavo covex lens and convexo concave lens

Which class of lever is acting in the case of "a cycle brake".please explain

An earnest request to all those students who attempted a regional language paper ( Tamil, kannada, bengali etc) :
Can you post the essays and letters that you had received in the question paper in : English or Hindi? It will be beneficial to all Hindi students as a similar topic may come.
Thank you.

+ 1 more questions by eeshaan17  

1) Can someone upload some numericals on physics? 2) Is fusion = melting as given in Selina. If it is so, why isn't latent heat of fusion = latent heat of melting.
asked by eeshaan17 7 years ago
2

Plz see the pic and ans the ques no 8.c

http://www.respaper.com/dgenerationx/9557-pdf.html?ln=32&ov=1 Q5 a pls..

what will be the effect on working if ac is used instead of dc in an electrical bell

A cell of emf 2V and internal resistance 1.2V is connected to an ammeter of resistance 0.8V and two parallel resistors of 4.5ohm and 9ohm. Find the reading of the ammeter, the PD across the terminals of the cell and the PD across the 4.5 ohm resistor

A metal ball coated with soot appears to shine underwater.
A person's face sitting near a campfire appears to shimmer.
Optic fibres along the road shine brightly during daytime
A person experiences mirage in a desert
Stars appear to twinkle in the sky
A truck driver sometimes sees a pool of water ahead of him on a road
Give Reasons pls

Give Reasons-
1.A light mass and heavy mass have equal momentum.Which will have more KE,Why?
2.Two equal and opposite forces act on an object.How is its motion affected?Give Reason.
3.What is the advantage of using a concave horse shoe magnet over straight magnet in electric motors.
4.If u place ur ear close to an iron railing which is tapped some distance away you hear the sound twice
5.The lower block of a block and tackle pulley must b of negligible weight.
6.The sun is seen few minutes before sunrise above the horizonand even after it sets.
7.The scissors for cutting cloth may hv blades longer than the handle,but shears cutting metals have short blades and long handles
Hope to get answers soon:)