PPSC Physics Chapter 6 Electricity and Magnetism With Answers

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PPSC Physics Chapter 6 Electricity and Magnetism

Sr. # Questions Answers Choice
1 An important application of the semi conductor is the Vacuum tube Fluroescent tube Copper oxide rectifier Battery
2 Lagging of magnetic flux density behind magnetic field is known as. Permeability Susceptibility Hysteresis Uncertainty
3 Materials that experience a force from stronger to weaker regions of magnetic field are called. Non magnetic Paramagnetic Ferromagnetic Diamagnetic
4 A material in which resultant magnetic moment is zero. Diamagnetic Paramagnetic Ferromagnetic Anti ferromagnetic
5 In a crystal lattice Atoms are arranged in an order way Atoms are arranged in a random way Holes are arranged in an order way Electrons are arranged in an order way
6 The permeability of a diamagnetic material is Greater than unity Less than unity Equal to unity Zero
7 Which of the following has teh maximum permeability. Paramagnetic substances Ferromagnetic substances Diamagnetic substances Iron oxide
8 Which of the following is not a ferromagnetic materials. Iron steel Copper Cobalt
9 When impurities are added to metals they Will decrease the elasticity Will increases the elasticity Will not change the elasticity Will or will not change the elasticity
10 Which of the following is an example of diamagnetic substances. Nickel Chromium Antimony Cobalt
11 Super conductor are used in Fast computer chips Magnetic resonance imaging Magnetic levitation trains All of the above
12 A well known example of an intrinsic semi conductors is. Germanium Phosphorus Cobalt Aluminium
13 The materials whose resistivity becomes zero below a certain temperature. Semi conductors Super conductors Insulators conductors
14 Such substance which undergo plastic deformation until they break are known as. Diatomic substances Monoatomic substances Ductile substances Brittle substances
15 The doped semi conductor materials are called Pure semi conductors Poor semi conductors Super conductors Extrinsic semiconductors
16 A substance which has empty conduction band. Insulator Conductor Semi conductor super conductor<div><br></div>
17 Artificial polymers are made by a chemical reaction known as. Crystallization Electroplating Polymerization Polarization
18 Which one of the following solids exhibits only shot range order. Amorphous solids Polymeric solids Crystalline solids Metals
19 Amorphous solids are also called Crystalline solids Glassy solide super conductors Polymeric solids
20 When a pentavalent material like arsenic is added to a tetravalent material such as germanium, we get a. n-type material p -type material diode super conductor
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