Question is ⇒ A coil has a designed for high Q performance at a rated voltage and a specified frequency. If the frequency of operation is doubled, and the coil is operated at the same rated voltage, then the Q factor and the active power P consumed by the coil will be affected as follows., Options are ⇒ (A) P is doubled, Q is halved, (B) P is halved, Q is doubled, (C) P remains constant, Q is doubled, (D) P decreases 4 times, Q is doubled, (E) , Leave your comments or Download question paper.

Question is ⇒ A coil has a designed for high Q performance at a rated voltage and a specified frequency. If the frequency of operation is doubled, and the coil is operated at the same rated voltage, then the Q factor and the active power P consumed by the coil will be affected as follows., Options are ⇒ (A) P is doubled, Q is halved, (B) P is halved, Q is doubled, (C) P remains constant, Q is doubled, (D) P decreases 4 times, Q is doubled, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A coil has a designed for high Q performance at a rated voltage and a specified frequency. If the frequency of operation is doubled, and the coil is operated at the same rated voltage, then the Q factor and the active power P consumed by the coil will be affected as follows.
A.	P is doubled, Q is halved [Wrong Answer]
B.	P is halved, Q is doubled [Wrong Answer]
C.	P remains constant, Q is doubled [Wrong Answer]
D.	P decreases 4 times, Q is doubled [Correct Answer]
View Answer 1 -2 Explanation:- Answer : D 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 :

⇒ In Bode diagrams an octave is a frequency band from
ω₁ to 10 ω₁
ω₁ to 8 ω₁
ω₁ to 4 ω₁
ω₁ to 2 ω₁

⇒ If load impedance Z_L >> Z₀, then
Z₀ = Z_L (VSWR)
Z_L = Z₀ (VSWR)
Z_L = Z₀ (VSWR - 1)
Z_L = Z₀ VSWR

⇒ For most static RAM the write pulse width should be at least
10 ns
60 ns
300 ns
1 μs

⇒

Assertion (A): δ(t - b) is an impulse occuring at t = b

Reason (R): Intergal of unit impulse gives unit step function.

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 true, R is false
A is false, R is true

⇒ Which two rows represent identical binary numbers?
A second and fourth
Fifth and eight
Third and seventh
Second and third

⇒ Assume that op-amp in figure is ideal. If input V_i is triangular, the output V₀ wil
square wave
sine wave
triangular wave
parabolic wave

⇒ A counter has 4 flip flops. It divides the input frequency by
4
2
8
16

⇒ When one operand is real and one integer in Pascal, which of the following operations are not allowed?
+ and -
*
/
Div and Mod

⇒ Loss of charge method is suitable for medium resistances.
TRUE
FALSE

⇒ The relative permeability of a ferromagnetic material is
1
less than 1
about 10
1000 or more

⇒ What is typical bandwidths of a 2-wire telephone line?
300 Hz to 3.4 kHz
20 Hz to 4 kHz
dc to 4 kHz
20 Hz to 20 kHz

⇒ Which of the following is used to generate PDM?
Free running multi-vibrator
Monostable multi-vibrator
JK flip-flop
Schmitt trigger

⇒ In the below figure, the load is highly inductive. The firing angle is a for each of the thyristors. The periods of conduction of Th₁ and Th₂ respectively
0 to p and p to 2p
a to p and p + a to 2p
a to p + a and p + p to 2p + a
a to p - a and p + a to 2p - a

⇒ The direction in a Yagi Uda antenna
is longer than the radiating element
is shorter than the radiating element
can be longer or shorter than the radiating element
does not exist

⇒ In the given figure shows a periodic triangular wave. The Fourier series will
all cosine terms
all sine terms
odd cosine terms
odd sine terms

⇒ Find V_o(t) for the following circ
0 V
5 V
3 V
2 V

⇒ A coaxial line has L = 500 nH/m and C = 50 pF/m. The characteristic impedance is
500 Ω
250 Ω
100 Ω
50 Ω

⇒ What does the B register contain after the first MOV B, A has been executed?
40 H
60 H
80 H
80 D

⇒ It is desired to evaluate the expression F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)
F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]
F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)
X = COS(Y)



⇒ An SCR is triggered at 80° in the positive half cycle, only. The rms anode current is 25 A. If the firing angle is changed to 160°, the rms current is likely to be
25 A
12.5 A
less than 25 A
less than 12.5 A

⇒ Two voltages are 50 ∠0 V and 75 ∠ - 60° V. The sum of these voltages is
109 ∠ - 60° V
109 ∠ - 25° V
109 ∠ - 36.6° V
100 ∠ - 50.1° V

⇒ A rectangular waveguide having TE₁₀ mode as dominant mode is having a cut off frequency of 18 GHz for the TE₃₀ mode. The inner broad wall dimension of the rectangular waveguide is
5/3 cm
5 cm
5/2 cm
10 cm

⇒ In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is
0.0416666666666667
1.25 A
0.25
6.25 A

⇒ DeMorgan's first theorem shows the equivalence of
OR gate and Exclusive OR gate
NOR gate and Bubbled AND gate
NOR gate and NAND gate
NAND gate and NOT gate

⇒ Assertion (A): Operator has a value 1 ∠ - 90° or 1 ∠ 90°.
Reason (R): Operator 'a' has a value 1 ∠ 120°.

Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true

⇒ In open circuit impedance parameters, the independent variables are
I₁ and I₂
V₁ and V₂
V₁ and I₁
V₂ and I₂

⇒ Which of the following flip-flop is used as a latch?
J K flip-flop
R S flip-flop
T flip-flop
D flip-flop

⇒ If the differential voltage gain and the common mode voltage gain of a differential amplifier are 48 dB and 2 dB respectively, then its common mode rejection ratio is
23 dB
25 dB
46 dB
50 dB

⇒ Which of the following capabilities are available in a Universal Shift Register? Shift left
Shift right
Parallel load
Serial add
 Select the correct answer from the codes given below:
2 and 4 only
1, 2 and 3
1, 2 and 4
1, 3 and 4

⇒ The effective refraction index of the ionosphere for radio wave is
more than unity
less than unity
equal to unity
either more or less than unity depending on the electron concentration









Users Also Read
Previous Papers
Aptitude
Reasoning
Gen.Knowledge
Speak English
English / Verbal
Online / Mock Test
Vedic Math







    
	
	




    
	StudySite.org is world's best free online study content provider, Copyright © 2024 by 
StudySite.org All Rights Reserved