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Are there any other states of matter exist other than Solid, Liquid and Gasses?
Yes. There are five known Phases or States of the matter: solids, liquids, gases, plasma, and Bose-Einstein condensates. You will study these in higher classes.

10 identical cell in series are connected to the ends of a resistance of 59$\Omega$,the current is  found to be 0.25A. But when the same cells being connected in parallel,are joined to the ends of a resistance of 0.05$\Omega$,the current is 25A EMF of  each cell is

A.

1V

B.

0.5V

C.

1.5V

D.

2V

In series:  In parallel:  (1)-(2)

Question

Two finite sets have m and n elements. The total number  subsets of first set is 56 more than second set, find m and n.

A.

B.

C.

D.

Magnetic field through a coil is changed with respect to time then emf induced in it then select the incorrect regarding induced emf in coil

$\begin{array}{l}{\text { Coil may be made up with wood }} \\ {\text { Coil may be connected with an open circuit }} \\ {\text { Coil must be of conducting nature }} \\ {\text { Induced emf does not depends upon resistance }} \\ {\text { the coil }}\end{array}$

Option (1) is Incorrect as the coil must be made of conducting substance if we want to induce emf and pass current through it.
1560259998516566813835.jpg

$\\1.\int \sqrt{\left ( \frac{\sin(x-a)}{\sin(x+a)} \right )}dx\\2.\int \frac{2\sin2x-\cos x}{6-\cos^2x-4\sin x}$

@Vinod

$\\\int \sqrt{\frac{\sin \left(x-a\right)}{\sin \left(x+a\right)}}dx\\rationalize\;it\\\int \sqrt{\frac{\sin \left(x-a\right)\sin \left(x-a\right)}{\sin \left(x+a\right)\sin \left(x-a\right)}}dx\\\int \frac{\sin \left(x-a\right)}{\sqrt{\sin \:\left(x+a\right)\sin \:\left(x-a\right)}}dx\\\because \sin \left(A+B\right)\sin \left(A-B\right)=\sin ^2A-\sin ^2B\\\int \frac{\sin x\:\cos a-\sin a\:\cos x}{\sqrt{\sin ^2x-\sin ^2a}}dx\\\cos a\int \frac{\sin x\:}{\sqrt{\sin ^2x-\sin ^2a}}dx\:-\sin a\int \:\frac{\:\cos \:x}{\sqrt{\sin \:^2x-\sin \:^2a}}dx\:\:\:$

$\\\cos a\int \frac{\sin x\:}{\sqrt{\sin ^2x-\sin ^2a}}dx\:\\\cos \:a\int \frac{\sin \:x\:}{\sqrt{1-\cos ^2x-1+\cos ^2a}}dx\:\\\Rightarrow \cos \:a\int \frac{\sin \:x\:}{\sqrt{\cos \:^2a-\cos ^2x}}dx\:\\put\;\cos x=t,and\;solve\\same\;method\;apply\;for\;\sin a\int \:\frac{\:\cos \:x}{\sqrt{\sin \:^2x-\sin \:^2a}}dx\:\:\:$

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Let and   be the roots of equation

is equal to:

• Option 1)

6

• Option 2)

-6

• Option 3)

3

• Option 4)

-3

3

Compound X will be

• Option 1)

• Option 2)

• Option 3)

• Option 4)

2

Find the compound "X" which give the following test:

Neutral FeCl3 $\rightarrow$ -Ve

Fehling Solution $\rightarrow$ -ve

Iodoform reaction $\rightarrow$ +ve

Grignard reagent $\rightarrow$ +ve

• Option 1)

• Option 2)

• Option 3)