Magnetic effect of Electric current
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CBSE Math Previous year Question paper
1. Find the value of p so that the quadratic equation Px(x – 3) + 9 = 0 has two equal roots. (2 Marks) 2. Find the value of p, for which one root of the quadratic equation px2 – 14x + 8 = 0 is 6 times the other (2 Marks) 3. Find the value of k for which x = 2 is a solution of the equation kx 2 + 2x – 3 = 0 (1 Marks) 4. Find the value/s of k for which the quadratic equation 3x 2 + kx + 3 = 0 has real and equal roots. ( 1 Marks) 5. Find all the zeroes of the polynomial x 4 + x 3 – 14x 2 – 2x + 24, if two of its zeroes are and – . (3 Marks) 6. Solve the quadratic equation 2x 2 +ax – a 2 = 0 for x (2 Marks) 7. Find the values of k for which the quadratic equation (k + 4) x 2 + (k + 1)x + 1 = 0 has equal roots. Also find these roots. (4 Marks) 8. Find the roots of the equation 1/x+4 – 1/x-7 = 11/30 (4 Marks) 9. If 1 is a root of the equations ay2 + ay + 3 = 0 and y 2 + y + b = 0, then find the val...
Matter in Our Surrounding Full Notes Pdf Download Here
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CBSE Sample paper ( Light refraction and reflection, Electricity, Acid base and salt, Reproduction, Preodic table, Carbon and its Compound, Chemical reaction and Equation, Life process)
1. A concave lens has focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also calculate the size of the image formed. (3 Marks) 2. Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of a concave mirror (iii) in front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens (5Marks) 3. What is the nature of the image formed by a concave mirror if the magnification produced by the mirror is +3? (2 Marks) 4. “The refractive index of carbon disulphide is 1.63. What is the meaning of this statement in relation to speed of light? (1 Marks) 5. Between which two points related to a concave mirror should an object be placed to obtain on a screen an image twice the size of the object? (1 Marks) 6. A ray of light enters a rectangular gl...
Electricity part-2 Notes विद्युत भाग दो
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Electricity Chapter Discussion Class 10 Part 1
Discussion Topic For CBSE, ICSE Bihar board, and all other state board Exam 1) Electric Charge 2) Electric Current
Sample paper and previous year Question paper Class 10 Math (Height and Distance, Arithmetic Progression, Surface area Volume, Coordinate Geometry, Trigonometry)
1. Two ships are there in the sea on either side of a light house in such a way that the ships and the light house are in the same straight line. The angles of depression of two ships as observed from the top of the light house are 60° and 45°. If the height of the light house is 200 m, find the distance between the two ships. [Use√3 =1.73] (3 Marks) 2. The angles of depression of the top and bottom of a 50 m high building from the top of a tower are 45° and 60° respectively. Find the height of the tower and the horizontal distance between the tower and the building. [Use√3 =1.73] (3 Marks) 3. A bird is sitting on the top of a 80 m high tree. From a point on the ground, the angle of elevation of the bird is 45°. The bird flies away horizontally in such a way that it remained at a constant height from the ground. After 2 seconds, the angle of elevation of the bird from the same point is 30°. Find the speed of flying of the bird. (4 Marks) 4. A mo...
Science Previous year Question Electricity Class 10
1. Write S.I. unit of resistivity. 2. What is meant by electric current? Name and define its SI unit. In a conductor electrons are flowing from B to A. What is the direction of conventional current? Give justification for your answer. 3. What is meant by electrical resistivity of a material? Derive its S.I. unit. Describe an experiment to study the factor on which the resistance of a conducting wire depends. 4. (a) Write two points of difference between electric energy and electric power. (b) Out of 60 W and 40 W lamps, which one has higher electrical resistance when in use. (c) What is the commercial unit of electric energy? Convert it into joules. 5. State Ohm’s law. Write the necessary conditions for its validity. How is this law verified experimentally? What will be the nature of graph between potential difference and current for a conductor? Name the physical quantity that can be obtained from this graph. 6. Name a device that helps to maintain a poten...