PHY102: TMA4 Electricity Magnetism and modern physics Question and Answers

Question 1 : A charge particle velocity in a plane perpendicular to a magnetic field describes a

1. circular trajectory
   B. charge point
   C. horizontal parabola
   D. None of these

Answer to question 1 is A. circular trajectory

Question 2 : According to Faraday’s law, the mass of a substance liberated in electrolysis is proportional to the

1. voltage passed
   B. quantity of electricity passed
   C. electrolytes
   D. charges

Answer to question 2 is B. quantity of electricity passed

Question 3 : In the cathode ray oscilloscope, the electron beam can be deflected either by an electric field or by
A. iron flux
B. current density
C. charge particles
D. magnetic field

Answer to question 3 is D. magnetic field

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Question 4 : In the cathode ray oscilloscope, when fast moving electrons strike the glass screen coated with zinc and sulphide they cause
A. fluorescence
B. incandesence
C. losses
D. magnetic field

Answer to question 4 is A. fluorescence

Question 5 : The electrode by which the flow of the electrons leaves the electrolyte is called
A. cathode
B. corridor
C. anode
D. None of these

Answer to question 5 is C. anode

Question 6 : Which of the following is not an element of a cathode ray tube
A. bryer
B. control grid
C. electron gun
D. heater

Answer to question 6 is A. bryer

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Question 7 : The cyclotron is a mahine for accelerating charged particles and ions to a high

1. velocity
   B. cyclons
   C. power
   D. voltage

Answer to question 7 is A. velocity

Question 8 : The chemical equivalent of a substance is its ————- divided by its valency
A. molecular weight
B. energy
C. mass
D. molecular weight

Answer to question 8 is A. molecular weight

Question 9 : When the direction of motion of the charged particle is neither parallel nor perpendicular to the direction of the magnetic field, it describes a
A. magnet
B. circular trajectory
C. helical trajectory
D. scalar

Answer to question 9 is C. helical trajectory

Question 10 : Which of the following is not magnetic
A. steel
B. nickel
C. iron
D. copper

Answer to question 10 is D. copper

Question 11 : A Charged particle moving in a uniform electric field follows a parabolic path because it is subjected to a
A. high velocity
B. constant acceleration
C. low voltage
D. uniform speed

Answer to question 11 is B. constant acceleration

Question 12 : The ———– of a substance is the number of times the average mass of one of the molecules is greater than the atomic mass unit
A. molecular weight
B. atomic mass
C. atomic weight
D. molecular mass

Answer to question 12 is A. molecular weight

Question 13 : The process of conducting electricity by an electric solution is known as
A. electrolysis
B. conduction
C. None of these
D. electrification

Answer to question 13 is A. electrolysis

Question 14 : The number of grammes of a substance equal to its molecular weight is called
A. None of these
B. A mole
C. Atom
D. node

Answer to question 14 is B. A mole

Question 15 : A Cell designed for the study of electrolysis is called a ————
A. generator
B. battery
C. cathode
D. voltameter

Answer to question 15 is B. Battery

Question 16 : The electrode by which the flow of the electrons enters the electrolyte is called
A. passage
B. cathode
C. Anode
D. electrolysis

Answer to question 16 is B. cathode

Question 17 : The direction of magnetic force is perpendicular to
A. only the total velocity
B. only magnetic field
C. total velocity and magnetic field
D. flux density

Answer to question 17 is C. total velocity and magnetic field

Question 18 : The ————- is the use of electrolysis to coat one metal with another

1. galvanization
   B. electroplating
   C. drilling
   D. casting

Answer to question 18 is B. electroplating

Question 19 : When current flows in one direction only it is called
A. Eddy
B. A.C
C. None of these
D. D.C

Answer to question 19 is D. D.C

Question 20 : The motion of a charged particle moving through a combination of the electric and magnetic fields, is described by the
A. faraday’s law
B. charge force
C. coulomb’s law
D. Lorenz force

Answer to question 20 is D. Lorenz force