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Recent questions tagged current
+2
votes
1
answer
For an ohmic substance, the resistivity depends on: A. the electric field
asked
Mar 17, 2019
in
Mathematics
by
kratos
current
resistance
+2
votes
1
answer
For an ohmic substance the resistivity is the proportionality constant for:
asked
Mar 14, 2019
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
In a conductor carrying a current we expect the electron drift speed to be:
asked
Mar 11, 2019
in
Mathematics
by
kratos
current
resistance
+1
vote
1
answer
Conduction electrons move to the right in a certain wire. This indicates that:
asked
Feb 1, 2019
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
The current is zero in a conductor when no potential difference is applied because:
asked
Jan 22, 2019
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
The proportionality constant
asked
Dec 13, 2018
in
Class 11
by
kratos
current
oscillations
class-11
nature of physical world and measurement
resistance
elasticity
equilibrium
+2
votes
1
answer
You wish to triple the rate of energy dissipation in a heating device. To do this you could triple:
asked
Dec 6, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
Two cylindrical resistors are made of the same material and have the same resistance.
asked
Nov 2, 2018
in
JEE
by
kratos
circuits
current
jee
resistance
class-9
jee mains
heat
+3
votes
1
answer
For an ohmic substance, the electron drift velocity is proportional to:
asked
Oct 19, 2018
in
Mathematics
by
kratos
current
resistance
+2
votes
1
answer
For an ohmic resistor, resistance is the proportionality constant for: A. potential difference and electric field
asked
Oct 19, 2018
in
Mathematics
by
kratos
current
resistance
+1
vote
1
answer
It is better to send 10, 000 kW of electric power long distances at 10, 000 V rather than at 220 V because:
asked
Oct 12, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
A cylindrical resistor of radius 2.5 mm and length 4.0 cm is made of a material that has a resistivity of 3.5 × 10^− 5Ω. m.
asked
Sep 23, 2018
in
JEE
by
kratos
circuits
current electricity
current
jee
resistance
jee mains
class-12
electric current in conductors
+3
votes
1
answer
A : For ohmic conductors, the resistance depends upon the potential difference and current flowing in it.
asked
Sep 21, 2018
in
Class 10
by
kratos
electricity
current
class-10
icse
resistance
+2
votes
1
answer
For a cylindrical resistor made of ohmic material, the resistance does NOT depend on:
asked
Sep 20, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
The current density is the same in two wires. Wire A has twice the free-electron concentration of wire B.
asked
Sep 12, 2018
in
Mathematics
by
kratos
current
resistance
+2
votes
1
answer
Two wires made of different materials have the same uniform current density. They carry the same current only if:
asked
Aug 29, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
Two substances are identical except that the electron mean free time for substance A is twice the electron mean free time for substance B.
asked
Jun 8, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
Current is a measure of: A. force that moves a charge past a point
asked
May 16, 2018
in
Mathematics
by
kratos
current
resistance
+3
votes
1
answer
A piece of wire is used as a heating element of a household heater. Its energy dissipation rate decreases 3.75% when the temperature
asked
May 2, 2018
in
Class 10
by
kratos
current
electricity
resistance
class-10
icse
current electricity
+1
vote
1
answer
If the potential difference across a resistor is doubled: A. only the current is doubled
asked
Apr 26, 2018
in
Mathematics
by
kratos
current
resistance
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