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10th Class Physics

Chapter No. 11
10th class physics
Conceptual questions
Q.No.11.1: - Why two tin cans with a stringstretched between them could be better way to communicate than merely shoutingthrough the air?
Q.No.11.2: - We can recognize persons speaking with the same loudness from their voice. How is this possible?
Q.No.11.3: - You can listen to your fried round a corner, but you cannot watch him/her. Why?
Q.No.11.4: - Why must the volume of astereo in a room with wall-to-wall carpet is turned higher than in a room witha wooden floor?
Q.No.11.5: - A student says that the twoterms speed and frequency of the wave refer to the same thing. What is yourresponse?
Q.No.11.6:- Two people are listening to thesame music at the same distance. They disagree on its loudness. Explain howthis could happen?
Q.No.11.7: - Is there any differencebetween echo and reflection of sound? Explain.
Q.No.11.8: - Will two separate 50dB soundstogether constitute a 100dB sound? Explain.
Q.No.11.9: - Why ultrasound is useful inmedical field?
Chapter No. 13
10th class physics
Conceptual questions
Q.No.13.1: - An electrified rod attractspieces of paper. After a while these pieces fly away! Why?
Q.No.13.2: - How much negative charge has been removed from a positively charged electroscope if it has a charge of7.5x10-11C?
Q.No.13.3: - In what direction will apositively charged particle move in an electric field?
Q.No.13.4: - Dose each capacitor carryequal charge in series combination? Explain.
Q.No.13.5: - Each capacitor in parallelcombination has equal potential difference between its two plates. Justify thestatement.
Q.No.13.6: - Is the presence of charge necessary for the existence of electrostatic potential?
Q.No.13.7: - Rubber tires get charged from friction with the road. What is the polarity of the charge?
Q.No.13.8: - Perhaps you have seen agasoline truck trailing a metal chain beneath it. What purpose does the chainserve?
Q.No.13.9: - If a high-voltage power linefell across your car while you were in the car, why should you not come out ofthe car?
Q.No.13.10: - Explain why, a glass rod canbe charged by rubbing when held by hand but an iron rod cannot be charged byrubbing, if held by hand?
Chapter No. 14
10th class physics
Conceptual questions

Q.No.14.1: - Why in conductors charge is transferred by free electrons rather than by positive charges?

Q.No.14.2: - What is the difference between a cell and a battery?

Q.No.152: - Does a fuse in a circuit control, the potential difference or the current?
Chapter No. 15
10th class physics
Conceptual questions
Q.No.15.1: - Suppose someone handed youthree similar iron bars and told you one was not magnet but the other two were.How would you find the iron bar that was not magnet?
Q.No.15.2: - Suppose you have a coil ofwire and a bar magnet. Describe how you could use them to generate an electriccurrent.
Q.No.15.3: - Which device is used forconverting electrical energy into mechanical energy?
Q.No.15.4: - Suppose we hang a loop of wireso that it can swing easily. If we now put a magnet into the coil, the coilwill start swinging. Which way will it swing relative to the magnet and why?
Q.No.15.5: - A conductor wire generates avoltage while moving through a magnetic field. In what direction should thewire be moved, relative to the field to generate the maximum voltage?
Q.No.15.6: - What is the difference betweena generator and a motor?
Q.No.15.7: - What reverses the direction ofelectric current in the armature coil of D.C. motor?
Q.No.15.8: - A wire lying perpendicular to an external magnetic field carries of a current in the direction shown in the diagram below. In what direction will the wire move due to the resulting magnetic force? (sorry for diagram.)
Q.No.15.8: - A wire lying perpendicular toan external magnetic field the magnetic field is along positive x-axis. Thewire carrying a current in the direction along positive y-axis. In whatdirection will the wire move due to the resulting magnetic force?
Q.No.15.9: - Can a transformer operate ondirect current?
Chapter No. 16
10th class physics
Conceptual questions
Q.No.16.1: - Name twofactors which can enhance thermionic emission.
Q.No.16.2: - Give three reasons to supportthe evidence that cathode rays are negatively charged electrons.
Q.No.16.3: - When electrons pass throughtwo parallel plates having opposite charges they are deflected towards thepositively charged plate. What important characteristic of the electron can beinferred from this?
Q.No.16.4: - When a moving electron entersthe magnetic field, it is deflected from its straight path. Name two factorswhich can enhance electron deflection.
Q.No.16.5: - In what ways is anoscilloscope a voltmeter?
Q.No.16.6: -How can you compare the logicoperation X=A.B with usual operation of multiplication.
Q.No.16.7: - NAND gate is the reciprocal ofAND gate. Discuss.
Q.No.16.8: - Show that the circuit given asbelow acts as OR gate.
Q.No.16.9: - Show that the circuit given asbelow acts as AND gate.
Chapter No. 17
10th class physics
Conceptual questions
Q.No.17.1: - Why optical fiber is moreuseful tool for the communication process. 
Q.No.17.2: - Which ismore reliable floppy disk or a hand disk?
Q.No.17.3: - What is the difference betweenRAM and ROM memories?
Chapter No. 18
10th class physics
Conceptual questions
Q.No.18.1: - Is it possible for an elementto have different types of atoms? Explain.
Q.No.18.2: - What nuclear reaction wouldrelease more energy, the fission reaction or the fusion reaction? Explain.
Q.No.18.3:- Which has more penetratingpower, alpha particle or gamma ray photon?
Q.No.18.4: - What is the difference betweennatural and artificial radioactivity?
Q.No.18.5: - How long would you likely haveto wait to watch any sample of radioactive atoms completely decay?
Q.No.18.6: - Which type of naturalradioactivity leaves the number of protons and the number of neutrons in thenucleus unchanged?
Q.No.18.7: - How much of a 1g sample ofpure radioactive mater would be left after four half-lives?
Q.No.18.8: - Tritium, 13His radioactive isotope of Hydrogen. It decays by emitting an electron. What isthe daughter nucleus?
Q.No.18.9: - What information about thestructure of the nitrogen atom can be obtained from its nuclide 714N?In what way atom in 714N is different from the atom in 716N?

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