Electrical Tutorial

Q.1. Plastics are       (a)  Good conductors of heat       (b)  Bad conductors of electricity       (c)  Good conductors of electricity       (d)  High density Ans (c) Q.2. In order to obtain p-type germanium it should be doped with a       (a)  Trivalent impurity       (b)  Tetravalent impurity       (c)  Pentavalent impurity       (d)  None of the above Ans (a) Q.3. Barrier potential in a P-N junction is caused by       (a)  Thermally generated electrons and holes       (b)  Diffusion of majority carriers across the junction       (c)  Migration of minority carriers across the junction       (d)  Flow of drift current Ans (b) Q.4. The heating elem...

Q.1. Superconductors are becoming popular for use in       (a)  Generating very strong magnetic field       (b)  Manufacture of bubble memory       (c)  Generating electrostatic field       (d)  None of the above Ans (a) Q.2. High resistivity materials are used in       (a)  Precision instrument       (b)  Heating Instruments       (c)  Incandescent lamp       (d)  All of the above Ans (d) Q.3. Mercury as an electric contact material is       (a)  A Liquid       (b)  A Metal       (c)  A Metal liquid       (d)   A gas Ans (c) Q.4. A conductor have transport phenomena of electron due to       (a)  Electric field       (b)  Magnetic field     ...

Q.1. Hard magnetic materials are used for making       (a)  Permanent magnets       (b)  Temporary magnets       (c)  Conductors       (d)  Insulator Ans (a) Q.2. Tick off the material, which is different from the group       (a)  Constantan       (b)  Manganin       (c)  Nichrome.       (d)  Brass Ans (d) Q.3. Tick of the property, which is different from the group       (a)  Ductility       (b)  Resistivity       (c)  Tensile strength       (d)  Hardness Ans (b) Q.4. The converse of hardness is known as       (a)  Malleability        (b)  Toughness       (c)  Softness     ...

Q.1. Materials, which provide a path to the magnetic flux, are classified as       (a)  Insulating materials       (b)  Semi conducting materials       (c)  Magnetic materials       (d)  dielectric materials Ans (c) Q.2. Ferrites are       (a)  Ferromagnetic material       (b)  Ferrimagnetic materials       (c)  Anti ferromagnetic material       (d)  Diamagnetic materials Ans (a) Q.3. The relative permeability of a para magnetic substance is       (a)  Unity       (b)  Slightly more than unity       (c)  Zero       (d)  100 Ans (b) Q.4. Manganin is an alloy of       (a)  Copper, Manganese and Nickel       (b)  Copper and Manganese     ...

Q.1 Materials which can store electrical energy are called       (a) Magnetic materials       (b) Semi conductors       (c) Dielectric materials       (d) Super conductors Ans (c) Q.2 ACSR (Aluminium Conductor Steel Reinforced) are used as       (a)  Over head transmission lines.        (b)  Super conductors       (c)  Fuse        (d) Underground cables Ans (a) Q.3.Brass is an alloy of       (a)  Copper and Zinc.       (b)  Copper and Iron       (c)  Copper and Aluminium       (d)  Copper and Tin Ans (a) Q.4.Property of material which allows it to be drawn out into wires       (a)  Ductility       (b)  Solder ability       (c)  Super conduct...