❗STUDY HUB ❗( NEET / JEE )M

2021-06-22 14:49:05 Electric Charges and Fields

NCERT PICKS

There is a spark or crackle when we take off oursynthetic clothes or sweater in dry whether.

It is observed that if two glass rods rubbed with wool or
silk cloth are brought close to each other, they repel each
other.

On rubbing two body, the mass of one body slightly get
lowered.

An ebonite rod held in hand can be charged by rubbing
with funnel but a copper rod cannot be charged like this.

When we touch a pith ball with an electrified plastic rod,
some of the negative charges on rod are transferred.

While calculating the force between the two charges
from coulomb's law, never take into account, the sign of
two charges. It just indicates nature of the force.

The test charge used to measure electric field at point is
taken as unit in magnitude or very small.

Field lines are always directed from higher potential to lower potential.

Neutral point is a point where resultant electric field is
zero.

When a charged particle enters with velocity at right
angle to the uniform field the trajectory is parabola.

A surface having same electric potential at every point is an equipotential surface.

Work done in moving a charge along an equipotential
surface is always zero.

Relative permitivity of the material is also known as
specific inductive capacitance.

Two charged spheres having Open / Comment

2021-06-22 13:44:41 How will your child thrive in the Post-COVID World?
Puzzled with questions like these?
Join the
Unacademy Emerge Community on Telegram
to know critical information like these and more!
See you there!

Link to join: https://t.me/UnacademyEmergeCommunity Open / Comment

2021-06-22 11:36:19 Causes of hepatomegaly

There are several potential causes of hepatomegaly including:

Infection: congenital, infectious mononucleosis, hepatitis, malaria

Haematological: sickle cell anaemia, thalassaemia

Malignancy: leukaemia, lymphoma, neuroblastoma, Wilm’s tumour, hepatoblastoma

Metabolic: glycogen and lipid storage disorders, mucopolysaccharidoses

Cardiovascular: heart failure

Apparent hepatomegaly: chest hyper-expansion (e.g. bronchiolitis/asthma) Open / Comment

2021-06-22 11:36:19 Menomics or short tricks to learn ANIMAL KINGDOM PART-2



PHYLUM MOLLUSCA:
Examples: Pinctada, Sepia, Octopus, Dentalium, Aplysia, Chaetopleura, Pila, Loligo.

MNEMONIC: Phir se Octopus dekhenge, aap pehle chai pe lo.
Phir – Pinctada
Se – Sepia
Octopus
Dekhenge – Dentalium
Aap – Aplysia
Chai – Chaetopleura
Pe – Pila
Lo – Loligo

PHYLUM ECHINODERMATA:

Examples: Ophinuria, Antedon, Asterias, Echinus, Cucumaria.

MNEMONIC: office mein aunty asked for ek cucumber.
Office – Ophinuria
Aunty – Antedon
Asked – Asterias
Ek – Echinus
Cucumber – Cucumaria.

PHYLUM ASCHELMINTHES/ NEMATODA:

Examples: Ancylostoma, Wuchereria, Ascaris, Rhabditis.

MNEMONIC: Annie Bechaari AksarReh jati hai
Annie – Ancylostoma
Bechaari – Wuchereria
Aksar – Ascaris
Reh – Rhabditis.

PHYLUM ANNELIDA:

Examples: Hirudinaria, Pheretima, Nereis.

MNEMONIC: HERO PHERE KE TIME NAHITHA.
Hero – Hirudinaria
Phere ke time – Pheretima
Nahi – Nereis.

PHYLUM ARTHROPODA:

Examples: Locusta, Limulus, Bombax, Apies, Scorpion, Butterfly, Palaemon, Laccifer, Anopheles, Culex, Aedes.

MNEMONIC: LOLITA BOMBAY AAKAR STORE SE BUTTER PEHLE MAT LENA.

LoLita – Locusta & Limulus
Bombay – Bombax
Aakar – Apies
Store – Scorpion
Butter – Butterfly
Pehle – Palaemon
Mat – Mosquitoes (Anopheles, Culex, Aedes)
Lena – Laccifer

PART -1 UPLOADED

STAY TUNED FOR SUCH TRICKS Open / Comment

2021-06-22 10:26:14 Why Unacademy Combat?
Challenge yourself
Win from a Scholarship Pool of 1 Crore
Test Date: 27 June


Code : PADHOFREE

Class 6th : https://unacademy.onelink.me/k7y7/dc01cc19
Class 7th : https://unacademy.onelink.me/k7y7/f33dec6b
Class 8th : https://unacademy.onelink.me/k7y7/e1895b67
Class 9th : https://unacademy.onelink.me/k7y7/1e272b1f
Class 10th : https://unacademy.onelink.me/k7y7/86ea1de3
Class 11th : https://unacademy.onelink.me/k7y7/b9700ac9
Class 12th : https://unacademy.onelink.me/k7y7/ea25ace2

#Combat Open / Comment

2021-06-21 10:59:20 CAPACITOR HAND WRITTEN NOTES PART 1
Open / Comment

2021-06-18 17:18:02 𝘾𝙝𝙖𝙥𝙩𝙚𝙧 - 𝙈𝙞𝙘𝙧𝙤𝙗𝙚𝙨 𝙞𝙣 𝙝𝙪𝙢𝙖𝙣 𝙬𝙚𝙡𝙛𝙖𝙧𝙚

1.curd also known as lactobacillus or lactic acid bacteria(LAB) with high nutritional quality by increasing vitamin B12.

2.large holes in Swiss cheese are due to production of a large amount of CO2 by bacteria named 𝙥𝙧𝙤𝙥𝙞𝙤𝙣𝙞𝙗𝙖𝙘𝙩𝙚𝙧𝙞𝙪𝙢 𝙨𝙜𝙖𝙧𝙢𝙖𝙣𝙞𝙞.

3.camemcert cheese(soft) - penicillium camemberti

4.Roquefort cheese( semi-hard) -penicillium Roqueforti

5.Baker's yeast- Saccharomyces cerevisiae.

6.'Toddy' prepared from sap of palms by fermentation.

7.yeast fermentation are
a) Beer- produced from hordeum vulgare and alcohal content is 3-6%
b) Wine - from grapes and alcohol amount is 10-20%
c) brands - distillation of wine and alcohol amount is 60-70%
d) Tum prodced from molasses of sugarcane and alcohol amount is 40%

8.penicillin was the first antibiotic by 𝘼𝙡𝙚𝙭𝙖𝙣𝙙𝙚𝙧 𝙁𝙡𝙚𝙢𝙞𝙣𝙜.

9. The bottle juice was cleared by 𝙥𝙚𝙘𝙩𝙞𝙣𝙖𝙨𝙚 𝙖𝙣𝙙 𝙥𝙧𝙤𝙩𝙚𝙖𝙨𝙚.

10. Streptokinase (by Bacterium streptococcus)- clot buster

11.Cyclosporin A ( by fungus trichiderma polysporum) - immunosuppressive agent

12.Statins (by yeast monascus purpureus) - blood cholesterol lowering agent.

13.𝘽𝙞𝙤𝙥𝙚𝙨𝙩𝙞𝙘𝙞𝙙𝙚- those biological agents that are used for control of weeds, insects,pathogens by viruses, bacteria, fungi, protozoa

14. 𝘽𝙖𝙘𝙪𝙡𝙤𝙫𝙞𝙧𝙪𝙨𝙚𝙨 used as biological agents are in the genus nucleopolyhedrovirus.

15. 𝘽𝙞𝙤𝙛𝙚𝙧𝙩𝙞𝙡𝙞𝙯𝙚𝙧𝙨- organisms that are enrich the nutrient quality of soil by bacteria, fungi, cyanobacteria.

16 .in 𝘽𝙞𝙤(𝙜𝙤𝙗𝙖𝙧) 𝙜𝙖𝙨 - 𝙢𝙚𝙩𝙝𝙖𝙣𝙚(50-70%), 𝘾𝙊2(30-40%), 𝙩𝙧𝙖𝙘𝙚𝙨 𝙤𝙛 𝙝𝙮𝙙𝙧𝙤𝙜𝙚𝙣, 𝙣𝙞𝙩𝙧𝙤𝙜𝙚𝙣, 𝙝𝙮𝙙𝙧𝙤𝙜𝙚𝙣 𝙨𝙪𝙡𝙥𝙝𝙞𝙙𝙚.

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂
▭▬▭▬▭▬▭▬▭▬▭▬▭▬ Open / Comment

2021-06-18 17:18:02 Formulas related to energy and work
Fd = k.e
mgh = 1/2 mv²
E = 1/2 kx²
E = Ve
E = nhf
E = nhc/lambda
E = Pc
K.e = hf - work function = hf - hf° = hf - hc/w° (here w° is cutt off wavelength)
E = 1/2 Pv
mv²/2r= Fc/2
K.E/r = Fc/2
K.E = Fc×/r/2
K.e = 1.5 KT
E = VQ
E = Power × time
E = Fvt
% loss in K.e = v1² - v2²/v1² × 100
% loss in P.e = h1² - h²/h1² × 100
Energy lost due to air friction(Fh) = 1/2mv² - mgh (when body is thrown upward)
Energy lost due to air friction(FS) = mgh - 1/2mv² (when body is thrown downward)
E = 1/2 CV² (capacitor)
E = R × hc (R is Rydberg' constant)
J = m-¹ × Js ms-¹
hf kalpha x rays = EL - Ek
hf kbeta x rays = EM - Ek
Binding energy = mass defect × c²
W = Fd Costheta
W = nmgh (when person is climbing stairs)
W = n(m+m) gh (when person is climbing stairs with some load)
W = 0mgh + 1mgh + 2mgh + 3mgh ....... (in case of stacking bricks. For ist brick h=0. For 2nd brick h=1. For 3rd brick h=2 and so on)
W = Fd = PA × change in V
W = Q - change in U
Q = mc × change in T
T/273.16 = Q/Q3 (Thermodynamic scale)
W = I²Rt
W = emf×charge
W = VQ
W = 1/2 lF
W = YAl²/2L
W = StressAl²/2Strain
W = PressureAl²/2Strain
W = Fl²/2Strain

BACKUP CHANNEL
▒☞ @ALLENBACKUPCHANNEL Open / Comment

2021-06-18 12:40:04 PHYSICS FORMULAS

Magnetic effect of Electric Current

FOR MORE JOIN
╔════════════════════════╗
▒ @ALLENBACKUPCHANNEL
╚════════════════════════╝
╔════════════════════╗
▒☞@ALLENLECTURESOFFICIAL
╚════════════════════╝ Open / Comment

2021-06-18 12:40:04 Open / Comment