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NCERT Solutions Class 10 Science Chapter 12 Electricity - Download Free PDFs

NCERT solutions for class 10 maths chapter 12 contain the correct answer and solutions to all those questions. Latest : Trouble with homework? Post your queries of Maths and Science with step-by-step solutions instantly.

Ask Mr AL. Q1 The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has a circumference equal to the sum of the circumferences of the two circles. Circumference of 1st circle is given :.

And the circumference of the 2nd circle is :. Thus the circumference of the new circle is. Hence the radius of the new circle is 28 cm. Q2 The radii of two circles are 8 cm and 6 cm respectively. Find the radius of the circle having an area equal to the sum of the areas of the two circles. We know that 10tn area of the circle is :. Thus area of a 1st circle :. And the area of a 2nd circle is :.

According to the question area of the new circle is. Hence the area of the new circle is 10 cm. Q3 Fig. The diameter of the region representing the Gold score is 21 cm and each of the other bands is Find the area of each of the five scoring regions.

The radius of each scoring region can be found by adding The Lorem lpsum 322 boatplans/boat-excursion/bass-tracker-classic-vs-pro-160 bass vs pro 160 of the golden region is :.

Then the area of the blue region is :. And the area of the black region is :. Area of ncert solutions class 10th chapter 12 white region is :.

Q4 The ncert solutions class 10th chapter 12 of a car are of diameter 80 cm. How many complete revolutions does each wheel Lorem lpsum 322 boatplans/questions/ch-10-maths-class-10-extra-questions-number ������� ch 10 maths class 10 extra questions number �����! in 10 minutes when the car is traveling at a speed of 66 km per hour?

Lorem lpsum 322 boatplans/boat-trailer/12-aluminum-boat-trailer-table Check this out the number of revolution of the wheel be n. The circumference of the wheel is given by Now, the speed of the car is given by Thus distance traveled in 10 minutes is:. According to the question, we get. Hence the number of revolutions made by the wheel is Q5 Tick the correct answer in the following and justify your choice : If the perimeter ncer the area of Lorem lpsum 322 boatplans/fishing/cheap-boats-fishing-boats-english cheap boats fishing boats english circle are numerically equal, then the radius of the circle is.

A 2 units B units C 4 units D 7 units. Let the radius of the circle be r. Then according to question, we can write Hence option A is correct. We know that the area of a sector having radius r and angle is given by Thus the area of the given sector is Q2 Find the area of ncert solutions class 10th chapter 12 quadrant of a circle whose circumference is 22 cm.

We are given the circumference of the circle. Also, we know that the area of a sector is given by :. It is given that we need to find the area of a quadrant. Hence the area becomes Q3 The length of the minute hand of a clock is 14 cm. Find the ncert solutions class 10th chapter 12 swept by Ncert Solutions Of Class 10th Geography Chapter 7 Work the minute Lorem lpsum 322 boatplans/questions/upstream-and-downstream-questions-class-10-year continue reading in 5 minutes. The minute hand rotates o in one hour. We need to find rotation in 5 min.

The area of the sector chaprer given by :. Hence the area swept by minute hand in 5 minutes is. Q4 A chord of a circle of radius 10 cm subtends a right angle at the center. Find the area of the corresponding : i minor segment. The angle in the minor sector clasw 90 o. Thus the area of the sector is given by Now the area of a triangle is Find the area of the corresponding : ii solufions sector. The area of the major sector can be found directly by using the formula :. Thus the area is :. Find: i the length of the arc.

The length of the arc is given by Hence the length Lorem lpsum 322 boatplans/used-boats/bass-boat-trailers-for-sale-used-pack read more the arc is 22 cm. Find: ii area of the sector formed by the arc. We know that the area of the sector is given by Thus chatper area of the sector is cm 2. Find: iii area of the segment formed by the corresponding chord. For the area of the segment, we need to subtract the area of the triangle attached with the area of arc.

Thus consider the triangle It is given that the angle of arc is 60 oor we can say that all angles are 60 o since two sides are equal. Hence it is an equilateral triangle. Area of triangle is Hence the area solugions segment is Find the areas of the corresponding minor and major segments of the circle. Use. The area of the sector is :. Now consider the triangle, the angle of the sector is 60 0. This implies it is an equilateral triangle. As two sides are equal so will have the same angle.

This possible only when all angles are equal i. Thus, the area of the triangle is Clsas area of the minor segment ncert solutions class 10th chapter 12. And the area of the major nxert is :.

Find the area of the corresponding segment of the circle. For the area of the segment, we need the area of sector and area of the associated triangle. So, the area of the sector is :. Now, consider the triangle Draw a perpendicular from the center of the circle on the ncert solutions class 10th chapter 12 of the triangle let it be h.

Using geometry we can write. Thus the area of the triangle is :. Hence the area of segment is:. Q8 A horse is tied to a peg at one corner of a square shaped grass field of side 15 m by means of a 5 m long rope see Fig. Find i the clzss of that part of the field in which the horse can graze. Find ii the increase in the grazing area if the rope were 10 m long instead of 5 m.

When the length of the rope is 10 m, the area grazed ncert solutions class 10th chapter 12 be Hence the change in the grazing area is given by :. Q9 A brooch is made with silver wire in the form of a circle with a diameter of 35 mm. The wire is also used chaper making 5 ncert solutions class 10th chapter 12 which divide the circle into 10 equal sectors as shown in Fig. Find: i the ncert solutions class 10th chapter 12 length of the silver wire required.

The total wire required will be for 5 diameters and Lorem lpsum 322 boatplans/model/giant-scale-rc-model-boats-noise click at this page circumference of the brooch.

Question 3: How much energy is given to one coulomb of charge passing through a 6 V battery Answer:. Important Questions on Class 10 Maths Chapter 12 The radii of two circles are 19 cm and 9 cm respectively. So, practice is very significant for avoiding losing marks in a section where the possibility of scoring a hundred per cent is pretty high. For example, the angle subtended by a minute and hour hand at a certain time in the wall clock is repetitive. Find the area of each of the five scoring regions. Find the area of major and minor segments of the circle.
Final:

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