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PHYSICS BOOKS IN URDU PDF

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Ans: The dark and bright fringes on the screen of ripple tank represent the crests and troughs of transverse waves. The crests appear as bright. February 23, 10th class physics book in urdu pdf, 10th class physics book urdu medium, physics book for class 10 punjab board in urdu, physics books in. Guess 10th physics. Unit #: Motion of simple pendulum, Horizontal mass spring system, Damped oscillation, wave carries energy.

Theory MCQs F. Past Papers F. Theory Past Papers B. Showing posts with label physics books in urdu pdf. Show all posts.

The position of a fish inside the water seems to be at less depth than that of its actual positions due to refraction of eight. Will the bending of the light be more or less for a medium with high refractive index?

The bending of the light will be more for medium with high refractive index because these two are in direct relation with each other. Where a pen is placed in front of o convex lens if the image is equal to the size to the pen? What will be the power of the lens diapers? When a pen is placed at double distance of foal length i. Quick Quiz. How the size of the Pupil of our eye will change: In dim light? In bright light?

A man raises his left hand in a Plane mirror; the image facing him is raising his right hand. Explain why? A man raises his left hand in a plane mirror the image facing him is raising his right hand because light rays are reflected in a mirror, causing us to see a inverted image. In your own words, explain why light waves are refracted at a boundary between two materials? Light waves are refracted at the boundy between two material because the density of the material is going to be changed at this point.

When light waves enter from one transparent medium to another, due to change in density speed of light changes. The speed of light is different materials due to difference in their densities. The greater the optical density of the medium, the slower the speed of light and vice versa. Explain why a fish under water appears to be at a different depth below the surface than it actually is? Does it appear deeper or shallower? A fish under water appears to be at a different depth below the surface than it actually is due to refraction of light.

It will appear shallower because apparent depth is always less than that of real depth. Why or why not concave mirrors are suitable for make up?

Hence, the driver get a wider rear view of the automobiles behind and to see the vehicles following them. Distance acuity is measured more often then near acuity because at a long distance accommodation is relaxed so that refraction can be more accurate at a longer test distance, the effect of small changes in the subjects positions is less important and can be ignored.

So in smaller room, the use of mirror is recommended to increase the test distance. Do you think amount of positive change on the glass rod after rubbing with silk cloth will be equal to the amount of negative charge on the silk? This makes the glass rod positively charged and silk as negatively charged.

As electric charge is always conserved in a closed system so the number of electrons loosed by the glass rod are exactly equal to the number of electrons gained by the silk cloth.

What would happen if a neutral glass rod is brought near a positively charge class rod? Whey leaves of charged electroscope diverge if you touch its disk with a metal rod but they do not diverge if you touch the disk with a rubber rod? The leaves of charged electroscope diverge of we touch its disk with a metal rod because it is a good conductor but they do not diverge if we touch the disk with a rubber rod because it is a good insulator so there will no leakage of charge through it and the leaf divergence will not alter.

In a dry day if you walk in carpeted room and the touch some conductor you will get a small electric shock! Can you tell why does it happen? In a dry day when someone walks in a carpeted room, friction between the feet and the synthetic fabric of the carpet causes charge to build up in his body. If he then touches some conductor, he gets a small electric shock.

This occurs due to the movement of electric charges between the fingers and the conductor. If we double the distance between two charges what will be the change in the force between the charges?

Yet the person inside is not affected. Can you tell why? Yet the person inside is not affected because the interior of a hollow charged case is a field free region i.

Physics 10th (Urdu Medium)

Is the equivalent capacitance of parallel capacitors larger or small than the capacitance of any individual capacitor in the combination? As we know that. It is clear from the above equation that the equivalent capacitance of parallel capacitors is larger than the capacitance of any individual capacitor in the combination. Capacitor black DC current but allows AC current through a circuit.

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How does this happen? Capacitor blocks DC current because in case of DC capacitor behaves as an insulator and only store charge, but in case of AC capacitor behaves likes a conductor and allows AC current to pass through a circuit because of the continuously reversing polarity.

An electrified rod attracts pieces of paper. After a while these papers fly away! A man raises his left hand in a plane mirror the image facing him is raising his right hand because light says are reflected in a mirror, causing us to see a inverted. How much negative charge has been removed from a positively charged electroscope if it has a charge of 7.

Putting the values in the above equation. Hence 4.

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In what direction will a positive charge particle move in an electric field? The positively charged particle will move in the direction of electric field intensity. Because direction of electric field lines or from high potential to low potential. Does each capacitor carry equal charges in series combination? This process continues as a result of which each capacitor has same charge in series combination. Each capacitor in parallel combination has equal potential difference between its two plats.

Justify the statement. Each capacitor in parallel combination has equal potential difference between its two plates because in parallel combination all the left plates of each capacitor are connected to one terminal of the battery and the right ones are connected to the other terminal.

In this way each capacitor has a direct contact with the battery and draw the same potential. In the presence of charge necessary for the existence of electrostatic potential? Yes, the presence of charge is necessary for the existence of electrostatic potential because electrostatic potential because electric potential occurs when on electric field exists.

Rubber tires get charged from friction with the rood. What is the polarity of the charge? When rubber tires move on the road, due to friction with the road surface, the loosely bound electrons of rubber are removed and rubber tires get positively charged. Since earth is at zero potential so electrons are shifted from rubber tires to the road. Perhaps you have see a gasoline truck trailing a metal chain beneath it?

What purpose does the chain serve? A gasoline truck has a metal chain hanging from its rear side. This chain rolls on the road as the tanker moves. Due to friction with the air the air body of the truck charges any and tiny spark can cause havoc. This charge is continuously being transferred from the body of truck to the ground through this metallic chain.

Thus the danger of spark is eliminated. If a high-voltage power line fell across your car while you were in the car whey should you not come out of the car? Explain why, a gloss rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing, if held by hand? A glass rod can be charged by rubbing when held by hand because glass rod is bad conductor and charge produced on it is trapped and cannot be conducted through our body whereas an iron rod cannot be charged by rubbing, if held by hand, because iron is a good conductor charge through our body.

Answers Keys.

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How long does it take a current of 10mA to deliver 30C of charge? Putting the values in the above equation: Hence 10mA current will take Sec to deliver 30C to charge. Which metal is used as the filament of an electric bald? Explain with reason. This rising temperature may melt the metal. The current versus voltage graph of resistor is a straight line with constant slope.

The graph for light bulb is curved with a decreasing slope?

What can you infer from this? The graph for light bulb is curved with the decreasing slope with infers that light bulb is a non-ohmic material and resistance of light bulb rises current decreases as it get hotter. A bird can sit harmlessly on high tension wire. But is must not reach and grab neighbouring wire. A bird can sit harmlessly on high tention wire, But it must not reach and graph neighbouring wire, a potential difference would be established and a large amount of current would from through the bird causing its death.

Connect a battery to a small 2. Now add another light bulb in series with the first bulb. Observe the relative brightness of the bulbs compared to when only one bulb was lit. Repeat the process with two or three additional bulb in series. When we add another bulb in series with the first bulb the relative brightness of the bulbs reduces as compared to when only reduces as compared to when only one bulb was lit and when two or three additional bulbs are added in series, we observe that the relative brightness of the bulbs reduces but all the bulbs in the series circuit will have equal but reduced brightness.

As voltage is the energy with which electrons flow and this energy goes on decreasing successively in the upcoming components so it decreases the brightness. Connect as battery to a small 2. Connect a second light in parallel with the first and observe the brightness of the bulbs. Now add a third bulb in parallel with the others and note the brightness of the bulbs.

Does the brightness of the bulbs differ from the bulbs connect in the series with the battery? Brightness of each bulb connected in series will be equal but with decreased intensity and on the other hand in parallel combination brightness will be more as compared to bulbs in series and intensity remains the same. The reason in that in parallel combination potential drop across all the bulbs is same but in series it changes.

How many faults can you find after studying this picture? The fault after studying the given picture is that the green coloured earth wire and brown coloured live wire are not properly connect live wire are not properly connect with the pins of the three pin plug.

The correct way of wiring a three pin main plug is show in the figure given below. Why in metal charge is transferred by free electrons rather than by positive charge? I metals conductors there exist a metallic bond between the atoms, due to which a pool of free electrons is generated.

These free electrons are not bounded to nuclei and are free to move around randomly. They have weak force among them and nucleus. When such charges are exposed to external electric field, they physically move in specific direction and thus constitute current.

On the other hand positive charges are actually the deficiency of the electrons and are not responsible for the transfer of charge. What is the difference between a cell and a battery? Can current flow in circuit without potential difference? The above expression shows that the amount of current passing through the conductor is directly proportional to the potential difference. Hence, no current will flow in a circuit without potential difference because the flow of current continues as long as these are a potential difference.

Two points on an object are at different electric potentials. Does charge necessarily flow between them? Yes, if two points on an object are at different electric potential then charge will flow from higher potential to potential because flow of charge continues as long as there is a potential difference. Showing posts with label 10th class physics book in urdu pdf.

Show all posts. Guess 10th physics Unit: Define a relationship between speed, frequency and wavelength of a wave. Describe the uses of radioisotopes in different fields? Describe the direction of an induced EMF in a circuit. How does this phenomenon relate to conservation of energy?

Determine the equivalent resistance of series combination of resistors. Explain battery as a current source. Discuss the applications of electrostatics.

Explain briefly Background Radiations? Explain briefly the transmission of radio waves through space. Define fission reaction. How can you measure the speed of sound by Echo Method? What factors can affect the accuracy of this method? How current in measured? Which instruments are used to measure the current?

How transmission of electrical signal through wires is happened? How will you explain the reflection of light by spherical mirror? Show it with the help of activity. How will you explain the nature and properties of different radiations? Name the factors which can enhance thermionic emission. W hat is meant by accommodation?

Explain the mechanism of accommodation in human eye? What are analogue quantities and analogue electronics? Waves are the manes of energy transfer without transfer of matter.

What are spherical mirrors? Into how many types these are divided? What are magnetic effects of steady current? What are ultrasound or ultrasonic? How these can be used in daily life?

What do you know about digital quantities and digital electronics? What do you known about natural radioactivity?

Explain it briefly.

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