Page 9 - English Class X_cbse new (FINAL).cdr

TOPIC - 1

GAUSS THEOREM

Sub Topic: 1.3

QUESTION SOLUTION Marking TIPS & EXPLANATION

Two charged conducting spheres of radii r1 and r2 Electric potential on the surface of connected Scheme Tips:

connected to each other by a wire. Find the ratio of charged conducting spheres would be equal. [1] When two charged conducting spheres are connected,

electric fields at the surfaces of the two spheres. V.e. V1 V2 then charge flows between the two till their potentials

[2] Delhi Set-2 [2011] 1 q1 1 q2 become same.

4πεo r1 4πεo r2

[ Assuming q1 and q2 are charges on the
spheres connected to each other and r1 r2 are
their radii.

q1 = q2
r1 r2 ...(i)
⇒ q1 = r1
q2 r2

Now, ratio of electric field CintHensAitiPesTER-1
INTRODUCTION1 q1
E1 = 4πεo r12 = q1 × r22
DEMO E2 1 q2 q2 r12

QUESTION SOLU4TπIOεoN r22 MScahrkeimnge TIPS & EXPLANATION
[1] Tips:
Define microeconomics. EMuEn21ici=trosqque21cc×hornr21aosmhi=cosurr21sise×hsrr12ot22ulddsy, [ofrfoinmdievqid(ui)a]l economic The word 'micro' means small.
Or [1] Outside Delhi Set-1 2012 industries. etc. [1] Explanation:
Give the meaning of micro-economics. Microeconomics is the study of individuals, households
E1 = r2
[1] Delhi set 3 2009 E2 r1

[2] and firms' behavior in decision making and allocation of
resources. It generally applies to markets of goods and
Tick: How do you find this question?

services and deals with individual and economic issues

Easy V. Difficult

1. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark 1. 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 of the arrangement.

(ii) What is the weight of half metre rule? (ii) What is the weight of half metre rule?

[1] [Delhi set 1] 2012 [1] [Delhi set 1] 2012

2. A uniform half metre rule balances horizontally on a knife edge at 29 cm mark 2. A uniform half metre rule balances horizontally on a knife edge at 29 cm7 mark
when a weight of 20 gf is suspended from one end.
when a weight of 20 gf is suspended from one end.
(i)Physics Booklet_Unit 1_.indd 7Draw a diagram of the arrangement.
(i) Draw a diagram of the arrangement. 8/17/2018 8:35:22 AM