**Q1. Write short answers to the following questions. (10th Physics – Important SQs) ** |

Define vibratory motion. |

Define restoring force. |

Define spring constant. Write its formula. |

What is meant by a simple pendulum? Write the formula of its time period. |

If the time period of the simple pendulum is 1.99s then find its frequency. |

Define simple harmonic motion. |

Define time period. |

What is meant by wave length? |

What is meant amplitude? |

What is the difference between vibration and frequency? |

Write two characteristics of simple harmonic motion. |

Define mechanical waves. And write the names of its types. |

What are longitudinal waves? Also, give one example. |

What is the difference between transverse and longitudinal waves? |

Define wave equation. And write its formula. |

The frequency of a wave moving on a slinky is 4 Hz and wavelength is 0.4m. Find its speed. |

What is a stethoscope? |

What is meant by the loudness of sound? |

The sound of women is more shrill than men. Why? |

What is the difference between frequency and pitch? |

Define pitch and quality of sound. |

What is meant by a soundless whistle? What is the range of its frequency? |

What is meant by the intensity of sound? What is its unit? |

What is the difference between loudness and intensity of sound? |

Write the mathematical relation between loudness and intensity of sound? |

What is meant by decibel scale? |

What are the audible frequency ranges? |

Write down the audible frequency ranges for children and old people. |

Explain the concave mirror and convex mirror by a diagram. |

Define center of curvature and radius of curvature. |

Define mirror formula. |

State the laws of refraction. |

Write Snell’s law. And write its formula. |

What are the values of the refractive index for water and ice? |

Define refractive index. |

What is a critical angle? |

What is a convex or converging lens? Explain by a diagram. |

Define principal focus and focal length. |

What is meant by the power of a lens? Also, write its formula. |

The power of a convex lens is 5D. Find its focal length. |

Differentiate between real and virtual images. |

What is meant by electrostatic induction? |

State Coulomb’s law. |

What is the effect of distance on Coulomb’s force? Describe. |

In System International, what is the value of k in Coulomb’s law? |

Define electric field. Write its unit. |

.Define electric field intensity. |

Is electric field intensity a vector quantity? What will be its direction? |

Define electric field lines. Who introduced them? |

Write down two characteristics of electric field lines. |

Define electric potential. Write its unit. |

Define volt. |

Write the formula of electric potential energy. |

Who and when the first battery was discovered? |

What is the difference between a capacitor and a dielectric? |

Define capacitance. Write its unit. |

100.Write down two characteristics of the series combination of acitors. |

What is meant by dielectric? |

Write down two uses of capacitors. |

What is a filter circuit? |

Write the names of different types of capacitors. |

Define variable capacitors. |

Define fixed capacitors. |

What is meant by electrolytic capacitor? |

What is meant by Mica capacitor? |

What is the SI unit of electric current? Define it. |

Define electric current. Write its mathematical formula. |

What is meant by the conventional current? |

What is the difference between the flow of current and water? |

Which instruments are used to measure current? |

What is the difference between a galvanometer and an ammeter? |

What is an electrolyte? |

The diameter of a copper wire is 2mm. find its cross-sectional area. |

What is the SI unit of potential difference? Define it. |

What is the difference between electromotive force and potential difference? |

State Ohm’s law. Write its mathematical formula. |

What is meant by resistance? Write its unit. |

Define the SI unit of resistance. |

The resistance of the conductor increases by increasing the temperature. Why? |

What is meant by Ohmic and Non-Ohmic conductors? |

State Joule’s law. Write its mathematical formula. |

What is the difference between kilowatt hour and electric power? |

Write down the difference between watt and kilowatt hour. |

Define electric power. Write down its equation. |

Describe right hand rule. |

What is meant by solenoid? |

Who discovered the magnetic field produced around a straight current carrying conductor? |

Write two methods of increasing magnetic force. |

What is meant by electromagnetic induction? |

State the law of electromagnetic induction of Faraday. |

State Lenz’s law of induced emf. |

What is the difference between step up and step down transformer? |

Differentiate between digital and analogue quantities. |

What is meant by analogue quantities? Give example. |

Differentiate between analogue and digital electronics. |

Write the uses of digital electronics. |

What is digital to analogue converter? |

Write the advantages of uses of digital electronics over analogue electronics. |

What is meant by DAC and ADC? |

What is meant by digital electronics? Give an example.. |

What is meant by binary variable? |

What is meant by logic algebra or Boolean algebra? How is itsented? |

What is meant by logic state? |

Which are three universal logic gates? |

Write the names of logic operations. |

Define truth table. |

What is meant by AND operation? Write its symbol. |

Write truth table of AND operation. |

Write the symbol of AND gate. |

Draw circuit diagram for AND gate. |

What is meant by OR operation? Write its symbol. |

Draw circuit diagram for OR gate. |

What is meant by NOT operation? Write its symbol. |

Write truth table of NOT operation. |

Write the symbol of NOT gate. |

Write truth table of NOR operation. |

Write the symbol of NOR gate. |

Write the use of logic gates. |

Define data. |

Define information. |

Define information technology. |

Define telecommunication. |

Write two uses of computer in our daily life. |

What is meant by CPU? Why is it called the brain of computer? |

Write the names of four input devices in computer. |

What are Super computers? |

How light signal is sent through optical fibers? |

What is meant by internet? |

Write down the services of internet. |

What is electronic mail |

Write down two uses of E mail. |

What are browsers? |

Define operating system? Also give an example. |

What is E commerce? |

What are the two important services used in internet? |

What is meant by ATM? |

Write the names of four web browsers. |

What is global web? |

What is meant by isotopes? |

A nuclide is represented by symbol 13X6. Find the number of protons and neutrons in it. |

What is meant by neutron number? |

Differentiate between atomic number and neutron number. |

What is meant by isotope? How many isotopes hydrogen has? |

What is meant by natural radioactivity? |

What is meant by radioactive elements? Give examples. |

Write a short note on cosmic radiations. |

What is meant by cosmic radiations? |

Write down the causes of background radiations. |

What is meant by nuclear transmutation? |

What is meant by penetrating ability? |

Write down two characteristics of beta radiations. |

Write two characteristics of gamma rays. |

Write down two characteristics of alpha radiations. |

Write general equation of beta Decay. Also give an example. |

What is meant by half life of a radio active element? |

What is meant by half life? |

Write two uses of radio isotopes. |

What is meant by radio active tracers? |

What is the use of radio active isotopes in medical treatment? |

What is meant by carbon dating? |

What is meant by tracers? |

Differentiate between stable and unstable nuclei. |

Define nuclear fission. |

Write down the equation of nuclear fission. |

What is meant by a Fission chain reaction? |