Science > Physics > Circular Motion > Numerical Problems on Centripetal Force – 01 Example – 01: A 0.5 kg mass is rotated in a horizontal circle of radius 20 cm. Calculate the centripetal force acting on it, if its angular speed of revolution is 0.8 rad /s. Given: Mass of a body = m = […]
Science > Physics > Circular Motion > Centripetal and Centrifugal Force In this article, we shall study the concept of centripetal force and centrifugal force, their expressions, and examples. Centripetal Force: A force which acts on a body performing circular motion and acts along the radius of the circular path and directed towards the centre of […]
Science > Physics > Circular Motion > Centripetal Acceleration In this article, we shall study the concept of centripetal acceleration and expression for it. Centripetal acceleration is also called radial acceleration. Accelerated Motion: Velocity is a vector quantity which has magnitude as well as direction. Either magnitude or direction or both change the motion is […]
Science > Physics > Current Electricity > Numerical Problems on Internal Resistance of Cell Example 01: A steady P.D. is maintained between the ends of the potentiometer wire. A cell of e.m.f. 1.02 V is on an open circuit when its terminals are in contact with two points on the wire distant 150 cm. When […]
Science > Physics > Current Electricity > Numerical Problems on Potential Drop In this article, we shall study to solve numerical problems on the calculation of potential drop (potential gradient) on potentiometer wire. Example 01: A potentiometer wire is 10 m long and a P.D. of 6 V is maintained between its ends. Find the […]
Science > Physics > Current Electricity > Potentiometer In this article, we shall study the principle, construction, and working of a potentiometer and its uses. Principle of Potentiometer: When a steady current flows through a wire of uniform cross-section the potential difference per unit length of the wire is constant throughout the length of the […]
Science > Physics > Current Electricity > Numerical Problems on Wheatstone’s Metre Bridge 02 Example – 15: In Wheatstone’s metre bridge experiment with unknown resistance X in the left gap and 60 Ω resistance in a right gap null point is obtained at l cm from the left end. If the unknown resistance is shunted by equal resistance, […]
Science > Physics > Current Electricity > Numerical Problems on Wheatstone’s Metre Bridge 01 In this article and the next article, we shall study numerical problems based on Wheatstone’s metre bridge. Example – 01: A resistance of 10 Ω is connected in a left gap of a metre bridge. Two resistors of 20 Ω and 16 Ω are […]
Science > Physics > Current Electricity > Kirchhoff’s Laws In this article, we shall study Kirchhoff’s laws, construction, working and uses of Wheatstone’s metre bridge. There are two Kirchhoff’s laws viz: current law or junction law and voltage law or mesh law. Kirchhoff’s Current Law or Kirchhoff’s Junction Law: Statement: In an electric network, the algebraic sum of […]
Science > Physics > Current Electricity > Temperature Dependence of Resistance In this article, we shall study the effect of temperature on the value of resistance and thermistors and their uses. A metallic conductor consists of a large number of free electrons. These electrons are always in a state of random motion. When a potential […]