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Recent questions tagged current electricity
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1
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A capacitor C, of capacitance 1μF and a capacitor C2 of capacitance 2μF are separately charged by a common battery for a long time.
asked
Apr 7, 2019
in
JEE
by
kratos
current electricity
cbse
jee
jee mains
class-12
electric current in conductors
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1
answer
The electrochemical equivalent of a metal is 3.3 × 10^–7kg per coulomb. The mass of the metal liberated at the cathode
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Apr 7, 2019
in
Chemistry
by
kratos
thermal and chemical effects of current
electrochemistry
class-11
jee
physical chemistry
jee mains
class-12
current electricity
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1
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The length of a wire of a potentiometer is 100 cm and the emf of its stand and cell is E volt. It is employed to measure the emf of a battery
asked
Apr 6, 2019
in
JEE
by
kratos
jee
current electricity
jee mains
+3
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1
answer
Three 2 ohm resitors are connected as shown in figure below.
asked
Apr 6, 2019
in
Class 12
by
kratos
neet
cbse
jee
jee mains
class-12
current electricity
+2
votes
1
answer
Ten identical cells each of potential E and internal resistance r are connected in series to form a closed circuit.
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Apr 6, 2019
in
Class 12
by
kratos
jee
neet
current electricity
jee mains
+2
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1
answer
An electric bulb has a rating of 500 W, 100 V. It is used in a circuit having a 200 V supply.
asked
Apr 6, 2019
in
Class 12
by
kratos
neet
current electricity
aiims
series ac circuits
ntse
road safety education
class-10
class-12
electric current in conductors
+2
votes
1
answer
Assertion: When the radius of a copper wire is doubled, its specific resistance gets increased.
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Apr 6, 2019
in
JEE
by
kratos
jee
current electricity
jee mains
jee main
+2
votes
1
answer
Redraw the circuit of Question 1, putting in an ammeter to measure the current through the resistors
asked
Apr 6, 2019
in
Class 10
by
kratos
class-10
electricity
current electricity
cbse
+3
votes
1
answer
(a) For a given a.c., i = imsinωt, show that the average power dissipated in a resistor R over a complete cycle is 1/2i^2m R.
asked
Apr 6, 2019
in
Class 12
by
kratos
neet
cbse
jee
class-10
jee mains
alternating current
current electricity
+1
vote
1
answer
How does the resistance of a wire vary with its area of cross-section?
asked
Apr 5, 2019
in
Class 10
by
kratos
cbse
electricity
class-10
icse
current electricity
+3
votes
1
answer
Five resistances are combined according to the figure. The equivalent resistance between the point X and Y will be
asked
Apr 5, 2019
in
Class 12
by
kratos
class-12
current electricity
neet
+1
vote
1
answer
Two lamps of resistance 30Ω and 20Ω respectively are connected in series in a 110V circuit.
asked
Apr 5, 2019
in
JEE
by
kratos
electricity
jee
electric power
class-10
icse
jee mains
house hold circuits
current electricity
+2
votes
1
answer
Find the resistor in which maximum heat will be produced.
asked
Apr 5, 2019
in
JEE
by
kratos
jee
current electricity
jee mains
+2
votes
1
answer
Why rheostat is used in the circuit ?
asked
Apr 5, 2019
in
JEE
by
kratos
current laws
electricity
jee
class-10
electrical maintenance
jee mains
class-12
current electricity
+2
votes
1
answer
A wire carries a current of 1.2 A, when a potential difference of 1.8 V is applied across it. What is
asked
Apr 5, 2019
in
JEE
by
kratos
jee
current electricity
jee mains
+3
votes
1
answer
A wire of resistance 12 Ω is elongated to double its length. Find the new resistance.
asked
Apr 5, 2019
in
JEE
by
kratos
jee main 2021
jee
jee mains 2019
class-10
icse
jee main
class-12
current electricity
+1
vote
1
answer
In the network shown in the figure each of resistance is equal to 2Ω. The resistance between A and B is
asked
Apr 4, 2019
in
JEE
by
kratos
electrostatics
jee
jee mains
class-12
current electricity
+3
votes
1
answer
What are the Relation between current and drift velocity ?
asked
Apr 4, 2019
in
Class 12
by
kratos
class-12
current electricity
cbse
+3
votes
1
answer
Consider two identical positive charges which are fixed on the y- axis, at (0,a) and (0, - a). Let a particle having a negative
asked
Apr 4, 2019
in
JEE
by
kratos
jee
electrostatics
current electricity
jee mains
+3
votes
1
answer
A micrometre has a resistance of 100 Ω and a full scale range of 50µA. It can be used as a voltmeter or a higher range ammeter
asked
Apr 4, 2019
in
JEE
by
kratos
jee
electrostatics
current electricity
jee mains
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