Question is ⇒ The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is, Options are ⇒ (A) 20 mH, (B) 10 mH, (C) 5 mH, (D) 2.5 mH, (E) , Leave your comments or Download question paper.

Question is ⇒ The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is, Options are ⇒ (A) 20 mH, (B) 10 mH, (C) 5 mH, (D) 2.5 mH, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is
A.	20 mH [Wrong Answer]
B.	10 mH [Wrong Answer]
C.	5 mH [Correct Answer]
D.	2.5 mH [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : C 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 :

⇒ TTL logic is preferred to DRL logic because
greater fan-out is possible
greater logic levels are possible
greater fan-in is possible
less power consumption is achieve

⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance
decreases
increases
remains constant
may increases or decreases

⇒ For what positive value of K does the polynomial s⁴ + 8s³ + 24s² + 32s + K have roots with zero real parts?
10
20
40
80

⇒ The maximum usable frequency for the 'E' layer is 10 MHz.
TRUE
FALSE

⇒ If N bits are lumped together to get an N-bit symbol, the possible number of symbols is
2^N
2^{N - 1}
2^{N - 2}
2^{N - 4}

⇒ Which one of the following is an indirect way of generating FM?
Armstrong modulator
Varactor diode modulator
Reactance FET modulator
Reactance bipolar transistor modulator

⇒ The total electrical energy emitted overall space from an electron of charge e and radius r is
e/ε₀r²
e²/ε₀r
e²/4pε₀r²
e²/8pε₀r

⇒ The slope of log magnitude curve changes by - 40 dB/decade at a certain frequency and the error between asymptote and actual curve is positive. This means that
a double pole is present
a pair of complex conjugate poles is present
either (a) or (b)
neither (a) nor (b)

⇒ For the logic circuit shown in figure, the simplified Boolean expression for the output
A + B + C
AB
B
C

⇒ Which of the following modes in circular waveguides are circularly symmetric?
TE₀₁
TE₀₂
both (a) and (b)
neither (a) nor (b)

⇒ The phase angle curve of G(jω) H(jω) is drawn by adding the phase angles of individual factors.
TRUE
FALSE

⇒ How many roots with positive real parts do the equation s³ + s² - s + 1 = 0 have?
Zero
One
Two
Three

⇒ Which of the following are included in the architecture of a computer?

Addressing modes, CPU
Instruction set, data formats
Secondary memory, operating system

Select the correct answer from the codes given below:
1 and 2
1 and 3
2 and 3
3 only

⇒ Which of the following real variable names is not valid in Fortran?
BETA
ALPHA
A
AB * 2

⇒ In brushless excitation system of modern alternators, the main exciter is
dc generator
ac generator
either dc or ac generator
induction generator

⇒

Assertion (A): The main use of positive feedback is in oscillator circuits.

Reason (R): In an oscillator the loop gain Aβ is kept slightly more than unity

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

⇒ One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
improved efficiency
better linearity
high power output per transistor
the lower modulating power requirement

⇒ Which of the following statements about the matched filter in a communication receiver are correct?

Its impulse response depends on the signed shape
It maximizes the SNR at the detection shape.
It produces ISI.
It may produce phase error if synchronization is improper.

Select the correct answer from the codes given below:
1 and 4 only
1 and 2 only
2, 3 and 4
1, 2 and 4

⇒

Assertion (A): In C a character constant is either a single alphabet or digit or special symbol enclosed within single inverted commas.

Reason (R): In C the maximum length of a character constant can be 2 characters.

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 R is wrong
A is wrong R is correct

⇒ A carrier signal at frequency 100 MHz is frequency modulated with modulation index 2 by a signal at 2 kHz. At what frequencies are the sidebands produced?
102 MHz and 98 Mhz
100 MHz + 2 kHz, 100 MHz - 2 kHz
100 MHz ± Δf_d where f_d is frequency deviation
100 MHz ± 3n kHz, where n is 1, 2, ... S integer

⇒ A duplexer is used to
couple two antennas to a transmitter
isolate the antenna from the local oscillator
prevent interference between two antennas connected to receiver
use an antenna for reception or transmission without interference

⇒ Symbol shown in figure represen
P-channel DEMOSFET
N-channel DEMOSFET
UJT with N-type base
UJT with P-type base

⇒ Which one of the following can be used for amplification of microwave energy?
TWT
Magnetron
Reflex klystron
Gunn diode

⇒ 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

⇒ For 200V r.m.s. value triangular wave, the peak voltage will be
200 V
222 V
280 V
346 V

⇒ The number of valence electrons in a donor atom is
2
3
4
5

⇒ Which of the following is the digital system?
PWM
PAM
PPM
PCM

⇒ Using 4-bit numbers (n = 4) if k = 0011₂, how is k expressed in 2's complement?
1011₂
1101₂
1100₂
0101₂

⇒ I-PD controlled system has
I, P and D actions in forward path
I, P and D actions in feedback path
I action in forward path but P and D action in feedback path
I action in feedback path but P and D actioins in forward path

⇒ A voltage V(t) is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt². If it is measured by a dc meter. The reading will be
0
4
2
2