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Recent questions tagged resistivity
+2
votes
1
answer
Define relaxation time of the free electrons drifting in a conductor. How is it related to the drift velocity
asked
Mar 30, 2019
in
Class 12
by
kratos
class-12
current electricity
resistivity
cbse
+3
votes
1
answer
Mobility of free electrons in a conductor is (1) directly proportional to relaxation time. (2) inversely proportional to relaxation time.
asked
Mar 5, 2019
in
Class 12
by
kratos
class-12
resistivity
current electricity
cbse
+3
votes
1
answer
If temperature is decreased, then relaxation of electrons in metals will (a) Increase (b) Decrease
asked
Feb 25, 2019
in
Class 12
by
kratos
class-12
resistivity
current electricity
cbse
+2
votes
1
answer
The number density of free electrons in a copper conductor estimated is 8.5 × 10^28 m^–3.
asked
Feb 17, 2019
in
JEE
by
kratos
resistivity
cbse
jee
jee mains 2019
jee mains
class-12
current electricity
+1
vote
1
answer
Resistance of a particular wire depends upon A. size and shape B. shape and length only
asked
Feb 14, 2019
in
Mathematics
by
kratos
resistivity
resistance
+2
votes
1
answer
Write the expression for resistivity in terms of number density and relaxation time.
asked
Feb 4, 2019
in
Class 12
by
kratos
class-12
resistivity
current electricity
cbse
+3
votes
1
answer
If in a conductor, number density of electrons is 8.5 x 10^28, average relaxation time 25 femtosecond mass
asked
Dec 14, 2018
in
Class 12
by
kratos
resistivity
cbse
kcet
class-12
current electricity
+3
votes
1
answer
Component which obeys ohm'* law is called A. resistive component B. efficient component
asked
Dec 10, 2018
in
Mathematics
by
kratos
resistivity
resistance
+1
vote
1
answer
Threshold voltage at which LED emits light is
asked
Nov 29, 2018
in
Mathematics
by
kratos
resistivity
resistance
+3
votes
1
answer
Find the new resistance of the cable:
asked
Nov 6, 2018
in
Physics
by
kratos
physics
resistivity
electricity
resistance
class-10
icse
electric circuits
class-12
dc circuit
ohms law
+2
votes
1
answer
Current and voltage are A. directly related B. inversely related C. not related
asked
Nov 5, 2018
in
Mathematics
by
kratos
resistivity
resistance
+1
vote
1
answer
Resistance of metal is affected by A. presence of impurities B. temperature C. both A and B
asked
Nov 1, 2018
in
Mathematics
by
kratos
resistivity
resistance
+2
votes
1
answer
At threshold voltage, resistance of diode A. decreases B. increases C. ******* constant
asked
Oct 23, 2018
in
Mathematics
by
kratos
resistivity
resistance
+2
votes
1
answer
Resistivity of lead is A. 22.5 × 10^-8 Ω m
asked
Oct 17, 2018
in
Mathematics
by
kratos
resistivity
resistance
+3
votes
1
answer
Give the name of materials which contain lots of free electrons.
asked
Oct 12, 2018
in
Class 12
by
kratos
cbse
class-12
current electricity
resistivity
+3
votes
1
answer
Using the concept of free electrons in a conductor, derive the expression for the conductivity of a wire in terms of number density
asked
Sep 22, 2018
in
Class 12
by
kratos
class-12
current electricity
resistivity
cbse
+3
votes
1
answer
What is the effect of relaxation time of electrons in a metal?
asked
Sep 12, 2018
in
Class 12
by
kratos
current electricity
cbse
class-12
resistivity
+3
votes
1
answer
A component that allows unidirectional current to pass through it is
asked
Sep 10, 2018
in
Mathematics
by
kratos
resistivity
resistance
+3
votes
1
answer
Frequency and time ****** are A. directly related B. not related C. inversely related
asked
Sep 4, 2018
by
kratos
waves
resistivity
capacitance
resistance
class-7
kcet
direct and inverse proportion
+3
votes
1
answer
A rectifier converts A. DC to AC B. AC to DC C. voltage in to current
asked
Sep 3, 2018
in
Mathematics
by
kratos
resistivity
resistance
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