# Class 10th Physics Guess Paper

# Section "B" Short Answer Questions

- Write three contributions of Ibn-al-Haitham. Or Al Khwarzimi.?
- What is anomalous expansion of water?
- Write down its two effects in every day life.
- Define Torque. What is S.I unit and write down the factors or which the torque of a body depends.
- Write three merits of a transistor OR Radar.
- State Ohm's law,Joule's law and Snell's Law.
- Newton's corpuscular theory of light. Define Specturm and Photon.
- Describe three kinds of lever with one example of each.
- Define critical angle. Write two neccessary conditions for total internal Refelection of light.
- Write any three uses of Ulrasonic.
- Define three kinds of Error.
- Write any three points of difference between real Image and virtual Image.
- Write any three difference between "g" and "G".
- Draw the ray diagream of te image formed by a plance mirror and write down its two characteristics.
- Write thee points of differnce between "mass and wieght"
- State Hooke's law and derive the expression for Young's Modulus.
- Write any three uses of radio-isotopes in medicine.
- A bullet of mass 20g is fired towards weest at a velocity of 60m/s. Calculate the momentum of the bullet.
- A force of 100N acts at an angle of 30@ with th ehorizontal. Find its horizontal and vertical components. (Cos 30=0.866.Sub 30=0.5)
- A shell is fire veritically upward with a velocity of 98m/s. Find the time taken by it to reach the highest point.
- A motor cyclest is traverlling along a circular track of radius 30m at soeed if 5m/s.If the total mass of motor cycle and rider is 360kg. Find the friction between road and tyre.
- Find the work done when a force of 400N acts on an object at an angle of 60 with the ground to move it 10m along the gound (Cos60=0.5)
- The focal length of concave mirror is 10cm.Where dould an object be placed so as to get its real image magnified four times.
- Calculate the amount of current passing through an electric heater if it takes 1800C of a chage to heat a room in 3 minutes.
- How much heat energy will be released when 15g of mass is completely transformed to energy.?
- How much heat energy will be required to raise the tempreature of 100g of water from 10 C to 60 C? (Specific heat of water-4200J/kgC)
- How a galvanometer can be converted into Ammerter and Voltemeter.?
- Dervie the equation 2aS=V-V OR S=Vit + 1/2 at
- Define momentum. State and explain law of conservation of momentum with the help an example.
- Describe the working of an electric bell and draw its neat and labeled diagram.
- Calculate the length of seconds pendulum (g=9.8m/s)
- Two resistors of 4(ohm) and 8 (ohm) are connected in parallel to voltage source of 12 voltage source of 12 volts. Find the equivalent resistance and current trough each resistor.
- Derive the formula M= gR2/G and calculate the mass of the earth.
- Draw the ray diagram of a compound microscope and write down its working.
- State Boyle’s law and Charle’s law and drive genera; gas equation PV = nRT.
- Explain reaction in u . Draw its diagram and also write down its equation.
- Define potential energy and kinetic energy and derive the equation K.E = ½ mv
- Draw the circuit diagram of parallel and series combination of resistances and write two characteristics of any one of them.
- Draw a neat and labeled diagram of a refrigerator and write down its working.
- What is an inclined plane/ derive the formula for its mechanical advantage.

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