29/03/2020Electronics(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Electronics(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Amplifier produces output with morepower and voltagecurrent onlyvoltage onlypower only2. A power supply which has voltage regulation of ……….. is unregulated power supply8%0%5%10%3. When a pure semiconductor is heated, its resistance …………..Can't sayRemains the sameGoes downGoes up4. A material with low reluctance and high permeability such as iron or soft steel is used to make what type of magnet?ResidualTemporaryPermanentNatural5. A pn junction acts as a ……….Unidirectional switchNone of the aboveBidirectional switchControlled switch6. The random motion of holes and free electrons due to thermal agitation is called ……….PressureNone of the aboveIonisationDiiffusion7. What subatomic particle has no chargeElectronProtonpositronneutron8. The number of electrons in the outermost shell of an atom determines which of the following characteristics of the atom?ValenceNumber of shellsAtomic weightAtomic Number9. The ability of a material to retain magnetism is calledIonizationReluctanceRetentivityPermeability10. The strength of a semiconductor crystal comes from ……..Forces between protonsNone of the aboveElectron-pair bondsForces between nuclei11. Hartley oscillator is commonly used in ……None of the aboveRadio transmittersRadio receiversTV receivers12. A hole and electron in close proximity would tend to ……….Have no effect on each otherNone of the aboveAttract each otherRepel each other13. A sensing device is also calledtransducerthermistortransistorsensor14. What subatomic particle has a positive charge and a large mass? ElectronNeutronProtonPositron15. If a multimeter has a sensitivity of 1000 Ω per volt and reads 50 V full scale, its internal resistance is ……….10 kΩNone of the above50 kΩ20 kΩ16. The law of magnetic poles states which of the following relationships?Like poles repel, unlike poles attractLike poles attract, unlike poles repelLike poles attract, unlike poles attractLike poles repel, unlike poles repel17. Magnetic materials have which of the following qualities?They can be magnetizedThey are attracted by magnetsBoth 1 and 2 aboveThey are electrical insulators18. If the full-scale deflection current of a multimeter is 50 μA, its sensitivity is ……..20 kΩ/V100 kΩ/V10 kΩ/V50 kΩ/V19. When an atom gains or loses an electron, which of the following terms applies?UnbalancedNeutralLightenedIonized20. When a pentavalent impurity is added to a pure semiconductor, it becomes ………n-type semiconductorp-type semiconductorAn insulatorAn intrinsic semiconductor21. When light is represented as a tiny packet of energy, what are these packets of energy called?PhotonsFrequenciesWavelengthsAngstroms22. Matter can be found in which of the following forms?LiquidSolidGaseousAll of the above23. An n-type semiconductor is ………Electrically neutralPositively chargedNegatively chargedNone of the above24. A forward biased pn junction diode has a resistance of the order ofΩNone of the aboveMΩkΩ25. A pentavalent impurity has ………. Valence electrons436526 out of 25Time is Up!