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Recent questions tagged alternating current
+2
votes
1
answer
Two coils have a mutual inductance 0.005 H. The current changes in the first coil according to equation
asked
Apr 7, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
jee
aiims
jee mains
magnetism
alternating current
class-12
+2
votes
1
answer
In transformer, alternating current is induced in
asked
Apr 7, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
alternating current
class-12
+3
votes
1
answer
A conducting square loop having edges of length 2.0cm is rotated through 180° about a diagonal in 0.20s.
asked
Apr 7, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
magnetism
alternating current
class-12
+3
votes
1
answer
Which of the following shows electrical conduction?
asked
Apr 6, 2019
in
Class 12
by
kratos
neet
class-8
aiims
class-12
alternating current
metals and non-metals
materials
p-block element
+3
votes
1
answer
If E=6V ,r=2ohm ,then maximum power dissipated through R is
asked
Apr 6, 2019
in
JEE
by
kratos
generators
alternating current
jee
jee mains
+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
(i) Figure shows the variation of resistance and reactance versus angular frequency.
asked
Apr 5, 2019
in
Class 12
by
kratos
alternating current
class-12
lcr series circuits
cbse
+3
votes
1
answer
A 20 Henry inductor and coil is connected to a 10 ohm resistance in series as shown in figure. The time at which rated
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
cbse
jee
jee mains 2019
jee mains
alternating current
class-12
+2
votes
1
answer
A series LCR circuit with L = 4.0H, C = 100μF and R = 60Ω is connected to a variable frequency 240V source as shown in
asked
Apr 5, 2019
in
Class 12
by
kratos
alternating current
class-12
cbse
+2
votes
1
answer
The figure shows a series LCR circuit connected to a variable frequency of 200 V source with L = 50 mH, C = 80 μF and R = 40Ω find
asked
Apr 5, 2019
in
Class 12
by
kratos
alternating current
class-12
lcr series circuits
cbse
+2
votes
1
answer
Describe the term : Alternating Current.
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+1
vote
1
answer
Consider the situation shown in figure (38-E13). The wire PQ has mass m,
asked
Apr 5, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
alternating current
class-12
+2
votes
1
answer
In the transmission of a.c. power through transmission lines, when the voltage is stepped up n times,
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
class-10
icse
alternating current
class-12
+3
votes
1
answer
What are Eddy currents? Give its two uses.
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+3
votes
1
answer
Hence obtain the expression for the energy density of magnetic field B produced in the inductor.
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
cbse
alternating current
class-12
+2
votes
1
answer
Why the core of a transformer is laminated ?
asked
Apr 3, 2019
in
Class 12
by
kratos
electromagnetic induction
isc
electro magnetic induction
icse
bseb model set
alternating current
class-12
+1
vote
1
answer
What is motional emf?
asked
Apr 3, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+3
votes
1
answer
The equivalent inductance of the network shown here is
asked
Apr 3, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
magnetism
alternating current
+3
votes
1
answer
The r.m.*. current in an ac circuit is 2 A. If the wattless current be √3 A , what is the power factor
asked
Apr 2, 2019
in
JEE
by
kratos
electromagnetic induction
transformer
cbse
jee
jee mains
alternating current
class-12
generator
+2
votes
1
answer
The core of any transformer is laminate so as to
asked
Apr 2, 2019
in
JEE
by
kratos
electromagnetic induction
electromagnetic oscillations
jee
jee mains
alternating current
class-12
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