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Recent questions tagged electric current
+3
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1
answer
In the circuit shown in figure, calculate the following : (i) Potential difference between points‘a’ and ‘b’ when switch ‘*’is open.
asked
Apr 7, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
jee mains
ohms law
+2
votes
1
answer
A homogeneous proton beam accelerated by a potential difference V = 600 kV has a round cross-section of radius r = 5.0 mm.
asked
Apr 6, 2019
in
JEE
by
kratos
magnetic fields
irodov
electrodynamics
electric current
jee
jee mains
+3
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0
answers
In a circular parallel plate capacitor radius of each plate is 5 cm and they are separated by a distance of 2 mm.
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Apr 6, 2019
in
JEE
by
kratos
irodov
electrodynamics
capacitance
electrostatics
electric current
jee
electrostatic potential
jee mains
class-12
+1
vote
1
answer
The potential difference, VC, across a 3 Farad parallel-plate capacitor whose plates have radius R = 2 cm varies with time and
asked
Apr 5, 2019
in
Class 12
by
kratos
irodov
neet
electrodynamics
electric capacitance
cbse
electromagnetic waves
jee main 2021
electric current
jee
aiims
jee mains
jee main
class-12
+3
votes
1
answer
The filament of a 240V metal-filament lamp is to be constructed from a wire having a diameter of 0.02mm
asked
Apr 3, 2019
in
Mathematics
by
kratos
electric current
ohms law
+3
votes
1
answer
What will be the value of charge when an electric current flows through a conductor?
asked
Apr 2, 2019
in
Class 12
by
kratos
class-12
electric current
ohms law
+2
votes
1
answer
The voltage-current (V-I) graph of a metallic conductor at two different temperatures T, and T, is shown below.
asked
Apr 1, 2019
in
JEE
by
kratos
electricity current
electric current
electricity
jee
class-10
jee mains
class-12
current electricity
+1
vote
1
answer
What will be the change in the resistance of a circuit consisting of five identical conductors
asked
Apr 1, 2019
in
JEE
by
kratos
electricity
electric current
jee
class-7
icse
jee mains
magnetism
current electricity
+3
votes
1
answer
The air between two closely located plates is uniformly ionized by ultraviolet radiation. The air volume between the plates is equal
asked
Mar 31, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
jee mains
+3
votes
1
answer
Two sources of current of equal emf are connected in series and have different internal resistances R1 and R2 (R2 > R1).
asked
Mar 29, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
jee mains
+1
vote
1
answer
Calculate the resistance of 1 km long cable composed of 19 stands of similar copper conductors.
asked
Mar 26, 2019
in
Mathematics
by
kratos
electric current
ohms law
+3
votes
1
answer
Grid cables are 15 km long with a resistance of 0.20 Ω km^-1 , powers wasted as heat in these cables are
asked
Mar 23, 2019
in
Mathematics
by
kratos
electric current
resistance
potential difference
+1
vote
1
answer
A person decides to use his bath tub water to generate electric power to run a 40 watt bulb. The bath tube is located at a height of 10 m
asked
Mar 21, 2019
in
JEE
by
kratos
current laws
electric current
jee
jee mains
current electricity
+1
vote
1
answer
There is an infinite wire grid with square cells (Fig. 3.38). The resistance of each wire between neighbouring
asked
Mar 21, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
jee mains
+2
votes
1
answer
Find the current flowing through the resistance R in the circuit shown in Fig. 3.46. The internal resistances
asked
Mar 18, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
jee mains
+3
votes
1
answer
The current I though a rod of a certain metallic oxide is given by I = 2V^5/2, where V is the potential difference across it.
asked
Mar 17, 2019
in
JEE
by
kratos
electrostatics
electric current
jee
jee mains
current electricity
+3
votes
1
answer
A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C.
asked
Mar 16, 2019
in
JEE
by
kratos
polytropic process
current laws
electric current
jee
thermodynamics
jee mains
current electricity
ohms law
+1
vote
1
answer
A small cylindrical magnet M (Fig. 3.95) is placed in the centre of a thin coil of radius a consisting of N turns.
asked
Mar 16, 2019
in
JEE
by
kratos
irodov
electromagnetic induction
electrodynamics
electric current
jee
jee mains
+1
vote
1
answer
How can a galvanometer be converted into an Ammeter ?
asked
Mar 14, 2019
in
JEE
by
kratos
irodov
electrodynamics
electric current
jee
resistance
jee mains
potential difference
+3
votes
1
answer
Drift velocity of electrons and derive ohms law from drift velocity
asked
Mar 10, 2019
in
Class 12
by
kratos
current electricity
class-12
cbse
electric current
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