Question is ⇒ In an RL series circuit the inductance is 1H and current at an instant is 0.6 A. The energy stored in magnetic field is, Options are ⇒ (A) 0.36 J, (B) 0.18 J, (C) 0.09 J, (D) 0.03 J, (E) , Leave your comments or Download question paper.

Question is ⇒ In an RL series circuit the inductance is 1H and current at an instant is 0.6 A. The energy stored in magnetic field is, Options are ⇒ (A) 0.36 J, (B) 0.18 J, (C) 0.09 J, (D) 0.03 J, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	In an RL series circuit the inductance is 1H and current at an instant is 0.6 A. The energy stored in magnetic field is
A.	0.36 J [Wrong Answer]
B.	0.18 J [Correct Answer]
C.	0.09 J [Wrong Answer]
D.	0.03 J [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ For resonant long wire antenna 'n' half wavelength long in free space, if 'n' is increased then inclination of the major lobe with wire axis will __________ .
increases
decreases
remains same
none

⇒ Which of the following statements is not correct regarding modes of electromagnetic energy transmission?
In TE mode the direction of electric field is always and everywhere transverse to the direction of propagation
In TM mode the magnetic field pattern is always and everywhere transverse to the direction of propagation
The subscripts is TE and TM designations denote the number of half sine wave variations of the field components in x and y directions respectively.
TM₁₁ is called the dominant mode.

⇒ For the system of the given figure |G(jω)| = 0 dB at &omeg
0
1 rad/sec.
∞
2.38 rad/sec.

⇒ The manufacturing technique used to manufacture strip type transmission line is
photoetching technique
oxidation technique
cladding
epitaxial

⇒ Peak to peak value of a sine wave is equal to twice the peak value
TRUE
FALSE

⇒ In the basic series inverter circuit, the source current has
low harmonic content
high harmonic content
low or high harmonic content depending on firing angle
zero harmonic content

⇒ Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
Power can be measured by this method only for star connected loads
When two wattmeters have equal readings power factor is 0.5.
When power factor is 1, one of the wattmeters readings is zero
When the two wattmeter read equal and opposite, p.f. is zero.

⇒ The velocity of electromagnetic wave in a good conductor is
3 x 10⁸ m/s
more than 3 x 10⁸ m/s
very low
high

⇒ If J, I and a denote current density, current and area of cross section of a conductor, then
J = Ia
J = I/a²
J = I/a
J = Ia²

⇒ For the network in figure, the correct loop equation for loop
-I₁ + 4I₂ + 11I₃ = 0
I₁ + 4I₂ + 11I₃ = 0
-I₁ - 4I₂ + 11I₃ = 0
I₁ - 4I₂ + 6I₃ = 0

⇒ The household energy meter is
indicating instrument
recording instrument
integrating instrument
none of the above

⇒ Consider the following statements:

With increase in temperature Fermi-level tries to come in between the energy gap exactly at middle
Mobility of electron in GaAs is very high compared to mobility of hole
In LED, the light energy radiated due to recombination with the aid of traps.

Which of these statements are true?
1 and 2
1, 2 and 3
2 and 3
1 and 3

⇒ A Weinbridge oscillator is a
VHF oscillator
RF oscillator
microwave oscillator
audio frequency oscillator

⇒ If transmission path, in PCM, is very long then
repeater stations are used
pulse width may be increased
pulse amplitude is increased
pulse spacing is reduced

⇒ A 3-digit voltmeter having a resolution of 100 mV can be used to measure a maximum of
100 V
200 V
1000 V
5000 V

⇒ L[c₁f₁(t) + c₂f₂(t)] =
c₁ F₁ (jω) + c_₂ F₂(jω)
c₁ F₁ (jω) - c_₂ F₂(jω)
c₁ F₁ (jω) + c_₂ F₂(jω) + c₁c₂
c₁ F₁ (jω) + c_₂ F₂(jω) + c₁/c₂

⇒

Assertion (A): Gunn diode is a transferred electron device.

Reason (R): A Gunn oscillator uses the phenomenon of transferred electron effect.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct

⇒ The characteristic impedance of coaxial cable is about
1000 ohm
500 ohm
250 ohm
75 ohm

⇒ Which one of the following rules determines the mapping of s-plane to z-plane?
Right half of the s-plane maps into outside of the unit circle in z-plane
Left half of the s-plane maps into outside of the unit circle.
Imaginary axis in s-plane maps in to the circumference of the unit circle.
All of the above

⇒ A 120 V, 30 Hz source feeds a half wave rectifier circuit through a 4 : 1 step down transformer, the average output voltage is
30 V
13.5 V
10 V
7.07 V

⇒ Which circuit is called emitter follower?
CC
CE
CB
Both (a) and (b)

⇒ The effective length of antenna is different from actual length due to
top loading
end effects
both (a) and (b)
none of the above

⇒ A trigonometric function is synonyms to
orthogonal function
triangular function
singular function
none of the above

⇒ In a tape recorder the erase head is
engaged during playback but disengaged during recording
engaged both during recording and playback
disengaged both during recording and playback
engaged during recording but disengaged during playback

⇒ Which of the following are needed both for protection and metering?
Wattmeters
Instrument transformers
Energy meters
Power factor meters

⇒ Which of the following materials in not an insulator?
Diamond
Graphite
Bakelite
Lucite

⇒ Which of the following pulse modulation is analog?
PCM
Differential PCM
PWM
Delta

⇒ Which is correct for a vacuum triode?
μ = r_pg_m
r_p = μg_m
g_m = μr_p
r_pg_m

⇒ A periodic voltage has following value for equal time intervals changing suddenly from one value to next... 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. Then rms value of the waveform is
31 V
32 V
insufficient data
none of these

⇒ In 8085 microprocessor, if instruction RST is written in a program then the program will jump to location
0020 H
0024 H
0028 H
002 CH