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Showing posts from December, 2016

### 6.Sum of Electrical Power Physics Class 10

Three sum of electrical power have been discussed. Here. These sum will give a basic idea of finding electrical power and electrical energy consumed by a load or electrical energy supplied by a source like battery.
The sums are:
1. Two resisters of value 6 ohm and 12 ohms are connected in series across a battery of 12 volt. Draw the circuit diagram and calculate.
a) Current flowing through each resistor.
b) The electrical energy consumed by each resistor.
+ Sollution- Close the Sollution 2. These two resistors again connected in parallel and the above data are again calculated.
+ Sollution- Close the Sollution 3. Two bulb L1 and L2 of rating 100 W 200 V and 10 W 200 Volt respectively are connected across a supply of 200 V in series. Find
a) Current flowing through each bulb
b) which bulb will consume more power.

### 5. Law of Refraction Of Light Physics Class 10

There are two laws of refraction of light. these are :
a) Incident say , refracted ray and normal lie on same plane .
The concept of plane is shown in the image. In terms of x,y and z co-ordinate system , the y-z plane is shown in light sky blue colour. We write on our copy which is considered x-y plane. The image is given just for understanding of plane concept. It is not needed while writing the law. Try to image other planes in the image.
b) Ratio of sin of angle of incidence and sine of angle of refraction remains constant for a pair of media. i.e. sin i / sin r = constant (n)
this constant is called refractive index of medium 2 with respect to medium 1.
or we can write
n2 / n 1 = sin i / sin r
Where n 1 is the refractive index of first medium here air. And n2 is the refractive index of second medium here glass.
∴ n2 = n1 x ( sin i / sin r )
If you have any query regarding the laws of refraction then comment below.

### Concept of Phrases and Clauses English Grammar for all higher Class

Concept of Phrases and Clauses are still much more confusing for students. But after going through this topic students will be more confident about phrases and clauses. Phrase: Three most basic elements of phrase are:
-Phrases are Group of words.

-Phrases Can not be used alone as it has got no complete meaning. -Phrases Has no subject and verb.

Examples:
On the hill.to read itIn the north.Have to complete the taskOn the table. Clauses: The Three most basic elements of clauses are:+Clauses are also Group of words.+Clauses Can be used alone as it makes sense by itself. +Phrases Has subject and verb.

Examples of Clauses:
who reach school lateHe is energetic.Til he stop shouting .Which is made up of Gold.Types of Phrases: Noun Phrases:The word group modifies the noun in the sentence. This group of words is called noun phrases.

Examples Noun Phrases:
A bright blue Shirt.Large quantity of water.A sharp knife.An interesting and beautiful place.Verb Phrases: Thre phrase contains helping ver…