Question is ⇒ A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be, Options are ⇒ (A) 2.5 mH, (B) 5 mH, (C) 20 mH, (D) 40 mH, (E) , Leave your comments or Download question paper.

Question is ⇒ A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be, Options are ⇒ (A) 2.5 mH, (B) 5 mH, (C) 20 mH, (D) 40 mH, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be
A.	2.5 mH [Wrong Answer]
B.	5 mH [Wrong Answer]
C.	20 mH [Wrong Answer]
D.	40 mH [Correct Answer]
View Answer 1 -1 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 :

⇒ If operator 'a' = 1 ∠120° then (1 + a + a²) =
-a
-a²
1
0

⇒ In high power radars, which of the following are used for switching?
Power diode
Power BJT
Power MOSFET
Thyristor

⇒ The household radio receiver uses
synchronous
envelope detector
radio detector
none of the above

⇒ Logarithmic amplifiers are used in
adders
dividers
multipliers
all of the above

⇒ The maximum range of a transmitter depends on
its frequency
its power
both its frequency and power
none of the above

⇒ Choose correct option for a stable system :

Roots of the characteristic equation of the system are real and negative
Area within the impulse response is finite

I is true, II is true
I is true, II is false
I is false, II is true
I is false, II is false

⇒ The density of dynamic RAM is
the same as static RAM
less than that of static RAM
more than that of static RAM
either equal or less than that of static RAM

⇒ Common emitter transistor has
high current and high voltage gain
low current gain and low voltage gain
high current gain and low voltage gain
low current and voltage gain

⇒ If L [f(t)] = F(s), Lf(t - T)
e^sTF(s)
e^-sTF(s)
F(s) - e^-sT
F(s) + e^-sT

⇒ In an hydrogen atom, an electron moves in the field of a proton. The stability of orbit requires equilibrium between coulomb's force and centrifugal force.
TRUE
FALSE

⇒ Which of the wave remains unaffected whether it is a day or night?
Sky wave
Ground wave
Tropospheric wave
Space wave

⇒ Tropospheric scatter propagation is not subject to any fading.
TRUE
FALSE

⇒ Read the following statements about time and space requirements of microprocessors

Space requirement is also known as memory requirement.
Space requirement is expressed in terms of bytes.
Time requirement is expressed in terms of states.
Time requirement is expressed in terms of μ- s.

Which of the above statements are correct?
1, 2 and 3 only
1, 2 and 4 only
2 and 3 only
1 and 4 only

⇒ A single phase semiconverter is feeding a highly inductive load. The circuit has a freewheeling diode across the load and firing angle is a. During one cycle of input voltage, the total duration of conduction of freewheeling diode is
a
2 a
4 a
0.5 a

⇒

Assertion (A): The velocity factor of a line is the ratio of wave velocity on the line to speed of light.

Reason (R): If the conductors of a line are immersed in a non magnetic insulating liquid, the wave velocity increases.

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

⇒ In level clocking the output can change
on rising edge of clock cycle
on falling edge of clock cycle
during entire half cycle of the clock
none of the above

⇒ The total lumens emitted by a source of 1 candle are
0.4 p
4 p
2 p
8 p

⇒ If word length is 16 bits the decimal equivalent of largest number which can be stored is
32767
32766
16383
16384

⇒ A constant k low pass filter has f_c = 1000 Hz. At f = 500 Hz, the phase shift is
p
zero
more than p
less than p

⇒ Binary number 11011.01 when converted to its 2's complement will become
101.11
1111.1
1100.1
100.11

⇒ Radar antennas are usually
dipoles
yagi antennas
parabolic dishes
none of the above

⇒ A resistance of 5 ohms is connected in one branch of a network. The current in this branch is 2.2. A. If the resistance is increased to 7.5 Ω, the remaining circuit being the same, the current in this branch will be
2.2 A
less than 2.2 A
2.2 A or less than 2.2 A
2.2 A or less or more than 2.2 A

⇒ In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of
1 H
2 H
3 H
4 H

⇒ The pole zero plot of the given figure is
non-minimum phase function
minimum phase function
all pass function
either (b) or (c)

⇒ Two capacitors of 2 μF and 4 μF capacitance are connected in series across a 30 V dc battery. After the capacitors have been charged, the voltage across them will be
15 V each
10 V and 20 V
20 V and 10 V
30 V each

⇒ If a small amount of Cu is added to Ni conductor, then
resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni
residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres
resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects
resistivity of Ni remains the same

⇒ In which device does the extent of light controls the conduction
photovoltaic cell
photo electric relay
LED
photo sensitive device

⇒ In a series RLC circuit excited by e = E_m sin ωt is seen that LC < 1/ω². Then
I lags E
I leads E
I leads E are in phase
voltage across L and C are equal

⇒ Analysis of EM wave in waveguide based on
circuit theory
field theory
optical theory
both (a) and (b)

⇒ In a transistor which of the following region is very lightly doped and is very thin?
Emitter
Base
Collector
None of the above