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In the displacement method, a convex lens is placed in between an object and a screen.If the magnification in the two positions are, m1 and m2 (m1>m2) and the distance between the two positions of the lens is x, the focal length of the lens is

As we know in the displacement method, Thus As we know, v - u = x By using the lens formula, For Position 1, we have... View Article

A variable line L is drawn through o (0,0) to meet the lines L1:Y−x−10=0 And L2:Y−x−20=0 . At points A And B Respectively. A Point P is taken nn L such that 2/Op = 1/Oa + 1/Ob And P,A,B lies on same side of origin O. The locus of P is

Now, by substituting in , we get Now, by substituting in , we get Therefore, = 40 = = 3y - 3x = 40 Therefore, the Locus Of... View Article

Fertilization Membrane Is Formed To

Fertilization membrane refers to a specialized membrane formed on the inner surface of the vitelline membrane of the ovum after the entry of a... View Article

Metallic Magnesium Is Prepared By______

Metallic magnesium is prepared either by electrolysis of molten MgCl_{2} or by metallothermic reduction of its halides by alkali or... View Article

Which Of The Following Is Not A Buffer Solution ? A) (Hcl/Nacl) B) (Nh4Oh/Nh4Cl) C) (Hcooh/Hcoona) D) (Ch3Cooh/Ch3Coona)

The correct answer is (A) HCl and NaCl. Buffer is an equimolar mixture of weak acid and salt with a strong base. Therefore, HCl and NaCl is not... View Article

Gold Sol Can Be Prepared By______

The gold solution can be prepared by reducing gold (III) chloride with the formalin solution. Here is the balanced equation involved in the... View Article

Which Of The Following Are Paramagnetic In Nature? (A) O2 (B) O2+(C)O2−(D) All of These

The correct answer is (D) All of these. Paramagnetism refers to the magnetic state of an atom with one or more unpaired electrons. O2: KK Bond... View Article

Consider The Reversible Isothermal Expansion Of An Ideal Gas In

Therefore, the slope of curve 2 is more than curve 1 and the intercept of curve 2 is more... View Article

The successor of a number 10000. What is the number?

The number is 10000 - 1 = 9999.... View Article

A regular polygon with 4 sides is called

A square is the regular polygon of 4 sides.... View Article

Find out the third proportional to 16 and 36.

Let the third proportional to 16 and 36 be x. 16 : 36 :: 36 : x ⇒ 16 × x = 36 × 36 ⇒ x = [36 × 36] / 16 = 81... View Article

Check whether 7+3x is a factor of 3x³+7x.

Answer: A polynomial is an algebraic expression in which the exponent on any variable is a whole number. Polynomial’s degree is the highest or... View Article

The ratio of 25 minutes to 1 hour is

Ratio = 25 / 60 = 5 / 12 = 5 : 12... View Article

5+5+5=550. Solve it.

Remove one of the + signs 545 + 5 = 550. Add a line on the top left side of the first addition symbol to make it 545.... View Article

Formulae for alpha square plus beta square

α2 + β2 = (α + β)2 - 2αβ... View Article

Represent -7/5 on the number line.

The representation -7/5 on the number line is given below.... View Article

The angles in a linear pair are _______.

The angles in a linear pair are supplementary.... View Article

Is log 2 rational or irrational? Justify your answer.

Let log10 2 = x 10x = 21 2 cannot be expressed as 10x for any value of x. Hence, log 2 is irrational.... View Article

Find the value of cosec ( -1410 degree).

cosec (- 1410) = - cosec (1410) = - cosec (1440 - 30) = - cosec (4 * 360 - 30) = - ( - cosec 30) = cosec 30 = 1 / sin 30 = 1 / (1 / 2) = 2... View Article

Find a rational number between 1 / 4 and 1 / 2.

Making the denominators the same, (1 / 4) = (1 / 4) (1 / 2) * (2 / 2) = 2 / 4 Multiply and divide by 2, (1 / 4) * (2 / 2) = 2 / 8 (2 / 4) * (2 /... View Article

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