ELECTRICITY AND MAGNETISM FUNDAMENTALS Multiple Choice Questions Part 5

ELECTRICITY AND MAGNETISM FUNDAMENTALS Multiple Choice Questions Part 5

ELECTRICITY AND MAGNETISM FUNDAMENTALS Multiple Choice Questions Part 5

1 Small voltages generated by a conductor with current in an external magnetic field.
Skin effect
Magnetic effect
Hall effect
Flywheel Effect

2 The emission of electrons from hot bodies is called
Radiation effect
Edison effect
Skin effect
Half effect

3 The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization when subjected to a dc magnetic field.
Wartheim effect
Wiedemann effect
Wiegand effect
Edison effect

4 An effect which is generally used in the gausameter to measure flux density.
Skin effect
Magnetic effect
Hall effect
Flywheel effect

5 The contribution to the ionization in an ionization chamber by electrons liberated from the walls.
Skin effect
Walt effect
Hall effect
Edison effect

6 The simplest type of atom to exist is the  atom.
Helium
Hydrogen
Boron
Oxygen

7 What revolves about the positive nucleus in a definite orbit?
Atom
Proton
Electron
Neutron

8 A germanium atom has an atomic weight of 72. How many neutrons are there?
32
40
34
36

9 How many neutrons does a copper atom have?
32
33
34
29

10 An alloy of 40 percent iron and 60 percent nickel.
Alnico
Permalloy
Hipernik
Manganin

11 The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as
Hall effect
Grounding
Shielding
Limiting

12 Which of the following is a vector quantity?
Magnetic potential
Magnetic field intensity
Magnetic permeability
Flux density

13 The quantity 10^6 maxwells is equivalent to one
Weber
Gauss
Gilbert
Tesla

14 What is the unit of reluctance?
Maxwell
Gauss
At/Wb
Weber

15 What is the SI unit of magnetic flux?
Tesla
Weber
Maxwell
Gauss

16 What is the unit of magnetomotive force?
Volt
Tesla
Ampere- turn
Weber

17 The unit of flux is  in cgs system.
Tesia
Gilbert
Maxwell
Oersted

18 Refers to the magnetic lines.
Hysteresis
Current
Flux
Magnetomotive force

19 Permeability means
The conductivity of the material for magnetic lines of force
The magnetization test in the material after exciting field has been removed
The strength of an electromagnet
The strength of the permanent magnet

20 _____is an electromagnet with its core in the form of a close magnetic ring.
Solenoid
Paraboloid
Toroid
Cycloid

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