Page 13 - English Class X_cbse new (FINAL).cdr

TOPIC - 1

ELECTROSTATIC POTENTIAL

Sub Topic: 1.4

QUESTION SOLUTION Marking TIPS & EXPLANATION
Scheme Tips:
The figure shows the field lines of a positive charge. Work done by charge is given by W = q (po-
An electric potential is the amount of work needed to
CHAPTER-1The work done by the field in moving a small posi- tential at Q – potential at P) where q = small

tive charge from Q to P positive or negative? positive charge. INTRODUCTION move a unit positive charge from a reference point to

DEMO The electric potential at a point distance r due a specific point inside the field without producing any
MScahrkeimngeacceTlIePrSat&ioEnX. PLANATION
P. . Q to the field created by a positive charge Q is
QUESTION gSMivOiecLnrUobeTycIOoVNno=m4iπc1εso [1] Tips:
q The word 'micro' means small.
Define mic+roeconomics. isr study of individual economic
Or [1] Outside Delhi Set-1 2012
unit such a∴srhp o<ursQeholds, industries. etc.

Give the meaning of micro-economics. vp > vQ Explanation:
[1] Microeconomics is the study of individuals, households
[1] Delhi set 3 2009 So, work done will be negative.
[1] Delhi Set-1 [2014] and firms' behavior in decision making and allocation of

Tick: How do you find this question? resources. It generally applies to markets of goods and
services and deals with individual and economic issues

Easy V. Difficult

Q11 . AApuoniniftocrmhahrgaelf +mQetirseprlualceebdaalat npcoeinst hOoraizsosnhtaolwlynoinn atheknfiifgeuered.gIes tahte2p9octemn-mark Q3 1D. efAineunainfoermquhipaolftemnetitarlesruurlfeacbea.laDnrcaewsehqouriipzoontetanltliyalosnurafakcneifse: edge at 29 cm mark
. . .twiahl edniffearewnecigehVt Ao–f 2V0B gpfoissitsivues,pneengdaetdivefroomr zoenroe?end.
(i) whinenthaewcaesigehot fosf i2n0glgefpisoisnut scpheanrgdeedanfrdom one end.
+(iQ) Draw a diagram of the arrangement. (ii) (i) inDaracownastadniatgerlaemctroicf tfiheeldairnraZn-gdeirmecetniotn. .

(ii) OWhat is the wAeight oBf half metre rule? (ii)WWhyhtahteisetqhueipwoeteignhtitaol sf uhrafalfcmesetareboruultea?single charge are not equidis-
tant?
[1[1]][DDeelhlhi Si este-1t [120] 1260] 12 [1] [Delhi set 1] 2012
(iii) Can electric field exist tangential to an equipotential surface? Give

2. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark 2. A urenaifsoormn. half metre rule balances horizontally on a knife edge at 29 cm mark

when a weight of 20 gf is suspended from one end. when a weight of 20 gf is suspended from one end. [3] OD Set-1 [2016]

Q2 T(wi) o Dmreatwallaicdsipahgerarems ooff trhaediai rRraanngdem2Renatr.e charged so that both of these Q4 A ch(ia) rgDer‘aqw’ isamdoiavgerdamfroomf tahepoairnrtaAngaebmoveenta. dipole of dipole moment ‘p’ to

h(aii)veWsahmateissuthrefacweeicghhatrogfehdaelfnmsiteytrσe. rIuf lteh?ey are connected to each other a po(iiin) t BWbhealtoiws tthhee wdiepioglhet ionfehqaulfamtoeritarel prlualnee? without acceleration. Find the
with a conducting wire, in which direction will the charge flo[w1]a[nDdelwhihsye?t 1] 2012
[5] OD Set-1 [2016] work done in the process. [1] [Delhi set 1] 2012

A

3. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark 3. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark

when a weight of 20 gf is suspended from one end. when a weight of 20 gf is suspended from one end.

(i) Draw a diagram of the arrangement. (i) Draw a diagram o-f qthe arrangement. +q

(ii) What is the weight of half metre rule? (ii) What is the weight of half metre rule? [[11]]O[DDSeelht-i1s[2e0t116]] 2012
11
[1] [Delhi set 1] 2012 B

4. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark 4. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark
whenPhysics Booklet_Unit 1_.indd 11 a weight of 20 gf is suspended from one end.
when a weight of 20 gf is suspended from one end. 8/17/2018 8:35:32 AM