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Recent questions tagged electromagnetic oscillations
+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
+1
vote
1
answer
An AC source rated 100V(rms) supplies a current of 10A(rms) to a circuit.
asked
Apr 1, 2019
in
JEE
by
kratos
electromagnetic induction
electromagnetic oscillations
jee
jee mains
alternating current
class-12
+1
vote
1
answer
A well designed transformer loses power under
asked
Mar 28, 2019
in
JEE
by
kratos
electromagnetic induction
electromagnetic oscillations
jee
jee mains
alternating current
class-12
+3
votes
1
answer
In a circuit an alternating current and a direct current are supplied together.
asked
Mar 25, 2019
in
Class 12
by
kratos
neet
electromagnetic oscillations
aiims
alternating current
class-12
+3
votes
1
answer
A resistor, an inductor, and a capacitor are connected in parallel to a sinusoidal source of emf.
asked
Mar 23, 2019
in
Class 12
by
kratos
alternating current
class-12
electromagnetic oscillations
electromagnetic induction
+1
vote
1
answer
In a purely inductive circuit, the current lags the voltage by: A. zero B. one-fourth of a cycle
asked
Mar 23, 2019
in
Mathematics
by
kratos
alternating current
electromagnetic oscillations
+1
vote
1
answer
The core of a transformer is laminated so that…… (a) Ratio of I/p & O/p voltage increases
asked
Mar 18, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
electromagnetic oscillations
jee
jee mains
alternating current
class-12
+1
vote
1
answer
An alternating voltage v(t) = 220 sin 100πt volt is applied to a purely resistive load of 50Ω. The time taken for the current
asked
Mar 14, 2019
in
JEE
by
kratos
electromagnetic oscillations
jee main 2021
jee
jee main
jee mains
alternating current
+2
votes
1
answer
The core of a transformer is made in a laminated form to:
asked
Mar 10, 2019
in
Class 12
by
kratos
alternating current
class-12
electromagnetic oscillations
electromagnetic induction
+2
votes
1
answer
The impedance of an RLC series circuit is definitely increased if:
asked
Mar 8, 2019
in
Mathematics
by
kratos
alternating current
electromagnetic oscillations
+2
votes
1
answer
Transformers are used (a) in DC circuits only
asked
Mar 3, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
electromagnetic oscillations
aiims
jee
jee mains
alternating current
class-12
+1
vote
1
answer
The primary of an ideal transformer has 100 turns and the secondary has 600 turns. Then:
asked
Mar 2, 2019
in
Mathematics
by
kratos
alternating current
electromagnetic oscillations
+1
vote
1
answer
For an ideal conductor, connected across a sinusoidal ac voltage source. State which one of the following quantity is zero :
asked
Mar 1, 2019
in
Class 12
by
kratos
electromagnetic oscillations
lcr series circuits
cbse
alternating current
class-12
+1
vote
1
answer
Graph shows variation of source emf V and current i in a series RLC circuit, with time.
asked
Feb 23, 2019
in
Class 12
by
kratos
electromagnetic induction
isc
electromagnetic oscillations
icse
alternating current
class-12
+1
vote
1
answer
The core of the transformer is laminated, because:
asked
Feb 23, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
electromagnetic oscillations
jee
jee mains
alternating current
class-12
+1
vote
1
answer
An RLC circuit has an inductance of 25 mH and a capacitance of 5.0 µF. The charge on the capacitor
asked
Feb 5, 2019
in
Mathematics
by
kratos
alternating current
electromagnetic oscillations
+1
vote
1
answer
A step-down transformer is used to: A. increase the power B. decrease the power
asked
Jan 19, 2019
in
Mathematics
by
kratos
alternating current
electromagnetic oscillations
+3
votes
1
answer
In the given circuit, the charge on 4 µF capacitor will be :
asked
Jan 17, 2019
in
JEE
by
kratos
electromagnetic oscillations
capacitance
electrostatics
jee
jee mains
alternating current
class-12
current electricity
+1
vote
1
answer
In an LCR circuit R = 100 ohm. When capacitance C is removed, the current lags behind the voltage by π / 3 .
asked
Jan 9, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
electromagnetic oscillations
aiims
alternating current
class-12
+2
votes
1
answer
In the following circuit, calculate (i) the capacitance 'C' of the capacitor, if the power factor of the circuit is unity, and
asked
Dec 12, 2018
in
JEE
by
kratos
electromagnetic induction
electromagnetic oscillations
jee
jee mains
alternating current
class-12
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