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BSc II Physics EMT Ch 1 & 2

BSc II  Physics EMT Ch 1


Syllabus: Electric charge and Coulomb's law + Electric field.


BSc II Physics EMT Ch 1 & 2
Syllabus: Electric charge and Coulomb's law + Electric field

1) Which one is correct result ?
..
Fe < Fg
Fe> Fg
Fg < Fe
both b and c

2) charge on one electron is
..
9.11 x 10^-31 C
6.25 x 10^18 C
1.6 x 10^-19 C
All of above

3) An isolated single charge is called
..
electric monopole
electric dipole
electric quadrupole
None of them

4) The resistivity of conductors is the order of
..
10^-8 Ohm meter
10^-6 Ohm meter
10^6 Ohm meter
10^8 Ohm meter

5) Elementary particle is
..
proton
neutron
electron
all

6) Eo is an electrical constant called
..
Resistivity of free space
permeability of free space
conductivity of free space
permitivity of free space

7) Coulomb law is not applicable for ______ charged particle
..
Microscopic
macroscopic
point charged
All

8) Coulomb's Law tells about _____ force.
..
attractive
repulsive
both a and b
none

9) The effect of medium ________ the Coulomb's force
..
increases
decreases
maximizes
none of them

10) Value of permittivity of free space is
..
9.1 x 10 ^-27
8.85 x 10^-10
8.85 x 10^-12
8.85 x 10^-6

11) In Annihilation of matter, net charge of the system is ____
..
+e
-e
+2e
zero

12) Charge of neutron is
..
+2e
+e
-e
none

13) Two oppositely directed dipoles close to each other are called
..
electric dipole
electric monopole
electric quadrupole
all

14) ______ is a good conductor
..
Aluminum
copper
iron
all

15) Well know insulator is
..
Copper
glass
sand
aluminum

16) Total charge in coulomb of 75 kg of electron
..
13 x 10^ 12 C
13 x 10^13 C
13 x 10^ 14 C
13 x 10^ -13 C

17) SI unit of electric field is
..
N/C
V/m
N/m
both a and b

18) Electric field lines has _______ direction
..
one
two
three
infinity

19) Electric field lines comes out from
..
negative charge
positive charge
both a and b
none

20) Electric charge is
..
quantized
discrete
both a and b
none

21) Formula of electric dipole moment is
..
P = q/m
P = q d^2
P = q d
all

22) The electric field due to ring of charge is E = k q / Z ^2 . Ring behave as a point charge when
..
Z << R
Z = R
Z >> R
All of above

23) Direction of electric torque is given by ______ rule
..
left hand
right hand
vectors rule
both b and c

24) Angle between electric charge and angular displacement is
..
0 degree
90 degree
180 degree
360 degree

25) Potential energy will be ------ when electric field and dipole moment are anti parallel to each other
..
Maximum
Minimum
Half of its max value
1/3 of its maximum value

26) An electron is accelerated at 1.84 x 10^9 ms^-2 by electric field. What is the magnitude of Electric field??
..
0.01 N/C
0.09 N/C
0.07 N/C
0.06N/C

27) What is the electric dipole moment of electron 4.3 nm apart
..
6.88 x 10^-21 C-m
6.88 x 10^-23 C-m
6.88 x 10^-25 C-m
6.88 x 10^-28 C-m

28) The regions between two charge where there is no electric field lines called
..
Positive zone
Negative zone
Neutral zone
None

29) Electric field between positive and negative plate is
..
Uniform
Non uniform
Zero
Weak

30)Formula of electric field intensity is
..
E = 2F/qo
E = F/qo
E= Kq/r^2
Both b and c


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