PHY102 Past Question / Practice Questions

Question 1
The force exerted by charged particles on each other
when they are at rest in a frame of reference is called
____ force
ANS: electrostatic
Question 2
___ forces, hold electrons to nuclei, atoms and
molecules together to give rise to bulk matter
ANS: electromagnetic
Question 3
There are ____ types of electric charges
ANS: two
Question 4
Two ebonite rods rubbed with fur and suspended from
a rigid support close to each other by threads will ____
each other
ANS: repel
Question 5
Objects with net unlike charges __ each other
ANS: attract
Question 6
"A ___ is the amount of charge that flow through a
cross-section of a wire in one second if there is a steady
current of one ampere (I A) in the wire"
ANS: coulomb
Question 7
"The law of ____ of charge states that the total electric
charge in an isolated system, that is, the algebraic sum
of the positive and negative charge present at any time,
does not change"
ANS: conservation
Question 8
If $Q_{1} and $Q_{2} are the magnitude of two charges
and r the distance between them, ____'s law states
that the electric force exerted by one charge on the
other F is $F=k\frac{Q_{1}Q_{2} }{r^{2}}$, where k is a
ANS: coulomb

Question 9
In the relation $k=\frac{1}{4\pi\epsilon_{o}}$,
$\epsilon_{o}$ is the ______ of free space
ANS: permittivity
Question 10
"The electric field due to a distribution of charges,
according to the ____ principle, is the vector sum of the
fields of the individual charges making up the
ANS: superposition
Question 11
"The ____ at a point in space is defined as the electric
force exerted on a test charge placed at that point"
ANS: electric field
Question 12
The flux of electric field through any cross-sectional
area is maximum when the angle between the
perpendicular to the surface and the direction of the
field is ____
ANS: zero
Question 13
The relation
where S is the surface area and the other symbols have
their usual meaning is an expression of ____' law
ANS: gauss
Question 14
"The ____ at a point in an electric field can be defined
as the work done per unit charge moving from infinity
to the point"
ANS: electric potential
Question 15
The unit 'joule per coulomb $ (JC^{-1})$ is also called
the _____
ANS: volts
Question 1

If the work per unit charge to bring a unit positive test-
charge from infinity to any point on a surface is

constant, then the surface may be referred to as _____
ANS: equipotential surface
Question 2

The work done by an external agent to move a test-
charge from place to place in a direction perpendicular

to the field is _____
ANS: electric potential
Question 3
The gradient of a scalar potential is a ____ quantity
ANS: vector
Question 4
The negative gradient of an electric potential equals
ANS: electric field
Question 5
An electrical insulator is also known as a ___
ANS: dielectric
Question 6
"If E is the field strength (assumed uniform) and V is the
p.d. between two parallel plates which are at a distance
d apart, then If E is the field strength (assumed
uniform) and V is the p.d. between the plates which are
at a distance d apart, then V=____"
ANS: ed
Question 7
"A pair of equal and opposite charges, $\pm{q}$,
separated by a vector distance $\vec\{a}$ is called an
electric ____ called"
ANS: dipole
Question 8
In the equation C = Q/V, where the symbols have their
usual meaning, the unit of C is called _______
ANS: farad
Question 9
The quantity $\frac{1}{2}\epsilon_{o}E^{2}$ represents
the electric ______

ANS: energy density
Question 10
Two 2-$\mu{F}$ capacitors in series are in parallel with
a 1-$\mu{F}$. The equivalent capacitance of the
capacitors is ______ $\mu{F}$
ANS: 2
Question 11
"The maximum electric field a material can withstand
without the occurrence of breakdown is called _____"
ANS: dielectric strength
Question 12
The unit of the quantity, $ 1/2 CV^{2}$, is _____
ANS: joules
Question 13
"Inserting an dielectric between the plates of a
capacitor ______ its capacitance
ANS: increases
Question 14
The figure shown is called _________
Question 15
The $\frac{1}{2} CV^{2}$ =\fracc{1}{2}\frac{Q^{2}}{C}$
represents the _______ stored in a capacitor
ANS: energy
Question 1
"When no other magnet is near, a freely suspended
magnet sets so that the line joining its poles (i.e its
magnet axis) is approximately parallel to the earth's
_____ axis"
ANS: north-south
Question 2
In the right-handed screw (grip) rule, the thump (screw)
points in the direction of the current while the fingers
(rotation of the screw) circle in the direction of the
______ lines
ANS: field
Question 3

The equation
where the symbols have their usual meaning, is a
statement of _____ law
ANS: Biot-savart
Question 4
For two wires carrying current in the same direction,
the magnetic force exerted on each other is ______
ANS: attractive
Question 5
CRO is the short form of ______
ANS: cathode ray oscilloscope
Question 6
In the equation $F = q\vec{E} + q
\vec{v}\times{\vec{B}$, F is called the _____ force
ANS: Lorentz force
Question 7
In the equation $\vec{H}=\frac{\vce{B}}{\mu_{o}}-
\vec{M}$, where the symbols have their usual meaning,
the quantity $\vec{M}$ is the ______
ANS: magnetization
Question 8
The induced e.m.f is directly proportional to the rate of
change of flux linkage. This is the statement of _____'s
ANS: faraday
Question 9
Lenz's law is an expression of the principle of
conservation of _____
ANS: energy
NOTE: LENZ’S LAW STATES THAT The direction of the
induced e.m.f. is such that it tends to oppose the
flux-change causing it, and does oppose it if induced
current flows.
Question 10
Electricity is transmitted at high voltages to avoid loss
of power but are distributed at low voltages for
domestic use using _____ transformers
ANS: step-down


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