is thatthe
conductor
provided
of
dimensions
through
current
of
flow
the
for
conductor
the
conductor?
by
offered
the
of
section
cross
with
area
of
cross
of
area
length.
conductor?
with
directly
the
adjusting
is electric
and
circuit.
for
its
to
used
the
proportional its
of
to
commonly
lengthproportional
conductor
varies
inversely
varies
the
graph
gives?
-V
of
device.slope
the
resistance
does
resistor?
devicean
conductor
is
is rheostat? in
conductor
conductor
current
resistance
resistance
of
the
resistance?
conditions-temperature,
potential
the the
electric
current
pressure
difference
flowing
its
acrossand
EXAMINATION a
ends
through
PRACTICAL
FOR
QUESTIONS
OHM'S
LAW
remain
same.
proportional
thatto
quantity
a opposition
of
VIVA-VOCE
electric variable
of
of
the
of
states
function
the
unit
resistance
resistance
variable
01.State
Ohm's
law.
physical
of
of
a
Conduc
physical
SI
law
of rheostat
a
Resistance
Conductor
Resistance
EXPERIMENT
O1:
ohm
the
the (2)
strength is
the
directly
conductor?
It
a
Ohm's
section.
04.How
the
the
is is
is
is
is
the
02.What
the Yes. 08.Which
It it. 03.What
05.How 06.What
It
07.Is
gives?
graph
vary
with
it?
through
current
the
it. with
across
does it.
through
key?
conductor
of
slope
open
potential current
vary
conductor
does
difference
the
is
It
the
Infinite.
the
isIt is
11.How 12.What
does
an
the
the
of
quantity
of
of of of resistance
independent
independent
resistance
resistance
10.How
across
the it?
Resistance.
physical
09.Which
"
07.What 06.Define
05.What
04.Which
03.Do
02.Why
ÉXPERIMENT
O5:
01.What
Page 9
current.
unit
per
on
the
division
one
of
galvanometer?
middle.
the
in
circuits.
current
in
No.
It
galvanometer
scale.
It
The
you The
It
div
t
h
e
is is
A
is
is do
is
is
di
v
part
pointer
A( the
current
coil
have
the
the the
galvanometer
device a a
you
galvanometer?
(ampere
of of
on
number
Sl
positive
current mean
SI
t
h
e
t
h
e
can
unit
unit sensitivity
used
FIGURE
galvanometer
galvanometer
deflect
by
per
of per
of of
and
for
required
current
fiqure
division
fiqure
has
division).
).
detecting
OF
negative
of
on zero
a
MERIT
of
of
either
galvanometer.
sitivity?
deflection
tomerit
merit?
centered
scale?
offers offers
produce
terminal
very
OF
side
of
resistance.
resistance?
GALVANOMETER
small
a
of
produced
qalvanometer?
a
in zero
electric
deflection
the
08.What
09.How the current sensitivity and fiqure of merit of qalvanometer related to each
other?
They are reciprocal to each other.
10.Why the divisions of galvanometer scale are equally spaced?
current.
Because, the deflection of the needle is directly proportional to the
is called half
11.Why the method of finding the resistance of galvanometer
deflection method?
It is because the deflection is made half by using ashunt resistance.
EXPERIMENT O6:
GALVANOMETER INTO VOLTMETER
01.What is a voltmeter?
two
A voltwmeter is adevice used for measuring potential difference between
points in acircuit.
02.How is a voltmeter to be connected in a circuit?
the
It is to be connected in parallel with circuit elemnent across which
potential difference is to be measured.
03.Why is a voltmeter used in parallel in a circuit?
of
The potential difference to be measured is maintained at the terminals
the voltmeter.
04.What should be the resistance of the voltmeter?
Avoltmeter should have a very large resistance (infinite, if possible).
05.Why should a voltmeter have a very large resistance?
10
Page
It should not draw much current from the circuit when connected.
the given
06.How do you convert
A galvanometer can
galvanometerinto avoltmeter?
be converted into a voltmeter by connecting a hial
galvanometer.
the
with
series
resistance in
resistance connected in series denende2
high
of
value
the
factors
07.On what
resistance of +
On the range of the required voltmeter and
It depends
galvanometer.
ideal voltmeter?
08.What is the resistance of an
resistance.
ldeal voltmeter has lnfinite
EXPERIMENT 10:
SEMICONDUCTOR DIODE
01.What is a Diode?
It is a junction between p-type and n-type semiconductor.
02.What is biasing of a junction?
Applying an external potential difference more than potential barrier on the
faces of the junction, is called biasing of the junction.
03.Name the two types of the biasing.
Forward biasing and reverse biasing.
04.Why is forward bias so called?
Because it makes free charge carriers to move forward towards
junction.
05.Why is reverse bias so called?
Because it makes free charge carriers to move reverse
away from junction.
06.Define a hole.
A place vacated by an electron, is called a hole.
It is
positive charge.
associated with a
07.Define an intrinsic semiconductor.
It is a pure
semniconductor in which number of
of holes.
electrons is equal to
number
08.Which materials are commonly used as
semiconductors?
Silicon and germanium are commonly used as
09.Define
an extrinsic
semiconductors.
semiconductor.
It is an impure
semiconductor in which
number of holes.
number
of
electrons
is not eaual to
10.Why is n-type semiconductor so called?
In n- type
semiconductor, electrons are the majority charge carriers which
are negative.
11.Why
is
p-type semiconductor so called?
In p- type
positive.
sewmiconductor, holes
are the majority charge carriers which are
12.What is junction potential barrier?
It is the potential
difference across the junction.
13.Why is junction potential barrier so
called?
Because it prevents free charge carriers frowm
enterin the depletion lag
themselves.
14.How does the bias affect the
thickness
of the
Forward bias decreases the thickness of
depletion layer?
depletion layer.
Reverse bias increases the thickness of
depletion layer.
15.How does the bias affect the junction resistance?
The forward bias makes junction resistance less.
The reverse bias makes junction resistance more.
16.Define characterstic of a junction diode.
A graph of current versus bias voltage is called characteristics of the diode.
It reveals the character (way of behavior) of the junction diode.
17.What is the order of resistance of diode in forward bias condition?
" It is of the order of 5-10 2.
18.What is the order of resistance of diode in reverse bias condition?
It is of the order of 10000 .
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