Question is ⇒ In a tape recorder, Options are ⇒ (A) both record and erase heads have high permeability core, (B) the record head has high permeability core but the erase head has low permeability core, (C) the record head has low permeability core but the erase head has high permeability core, (D) both record and erase heads have low permeability core, (E) , Leave your comments or Download question paper.

Question is ⇒ In a tape recorder, Options are ⇒ (A) both record and erase heads have high permeability core, (B) the record head has high permeability core but the erase head has low permeability core, (C) the record head has low permeability core but the erase head has high permeability core, (D) both record and erase heads have low permeability core, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	In a tape recorder
A.	both record and erase heads have high permeability core [Correct Answer]
B.	the record head has high permeability core but the erase head has low permeability core [Wrong Answer]
C.	the record head has low permeability core but the erase head has high permeability core [Wrong Answer]
D.	both record and erase heads have low permeability core [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : A 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 a depletion type NMOS, V_p = - 4 volts. For V_GS = 0, 1_D = 16 mA in the pinch off region of V_DS. For V_GS = - 2, the value of I_D in the pinch off region of V_DS is given by
64 mA
32 mA
16 mA
4 mA

⇒ A 3 phase bridge inverter is fed by 400 V battery. The load is star connected and has a resistance of 10 Ω per phase. The peak value of load current is
40 A
20 A
0.416666666666667
0.208333333333333

⇒ The total number of leads in SCR, DIAC and TRIAC respectively are
3, 2, 3
2, 3, 3
3, 3, 2
3, 2, 4

⇒ If f=0
X_L = 0 and X_C = 0
X_L = ∞, X_C = ∞
X_L = 0 and X_C = ∞
X_L = ∞ and X_C = 0

⇒ A single phase energy meter operates on induction principle.
TRUE
FALSE

⇒ Narrow band FM signal can be represented as
A cos (2pf_ct) - βA sin (2pf_ct) sin (2pf_mt)
A cos (2pf_mt) - βA sin (2pf_ct) sin (2pf_mt)
A cos (2pf_ct) + βA sin (2pf_ct) sin (2pf_mt)
A cos (2pf_mt) + βA sin (2pf_mt) sin (2pf_ct)

⇒ A voltmeter using thermocouples measures
rms value
peak value
average value
peak to peak value

⇒ When transistor is used as a switch __________ is defined as the interval which elapses between the transition of input waveform and the time when to transition to 90% of I_c(sat).
storage time
fall time
turn-on time
turn-off time

⇒ The characteristic equation for the next state (Q_n+1) of a J-K flip-flop is
Q_n+1 = JQ_n + KQ_n
Q_n+1 = JQ_n + KQ_n
Q_n+1 = JQ_n + KQ_n
Q_n+1 = JQ_n + KQ_n

⇒ One of a loss-less transmission line having the characteristic impedance of 75 Ω and length of 1cm is short-circuit. At 3 GHz, the input impedance at the other end of the transmission line is
0
resistive
capacitance
inductive

⇒ Armstrong modulator generates
AM signals
FM signals
PM signals
both (b) and (c)

⇒ In a minimum function
the degree of numerator and denominator are equal
the degree of numerator and denominator are unequal
the degree of numerator is one more than degree of denominator
the degree of numerator is one less than degree of denominator

⇒ Which of the following is not an interrupt line in 8085?
TRAP
RST 5.5
RST 7.5
RST 9.5

⇒ How many maximum number of functions can be defined with two symbols which are Boolean in nature:
4
8
2
16

⇒ Ionospheric storm causes an abnormal decrease in the critical frequency.
TRUE
FALSE

⇒ The accumulator drives the ALU.
TRUE
FALSE

⇒ In Z_RC(s) has a pole at s = 0, the first element in second Foster realization is
R
C
R and C in series
R and C in parallel

⇒ In a transistor operating in forward active mode
depletion layer between emitter and base is thin and that between base and collector is also thin
both depletion regions are thick
depletion layer between emitter and base is thin and that between base and collector is thick
depletion layer between emitter and base is thick and that between base and collector is thin

⇒ The resistance of the aluminium conductor (r = 2.83 x 10^-8 Ωm) in figur
0.001 Ω
less than 0.001 Ω
more than 0.001 Ω
more than 0.002 Ω

⇒ For measurement of surface temperature of solids the elements of RTD is usually in the shape of
bar
coil
flat grid
either (a) or (b)

⇒ A magnetron requires an external magnetic field with flux lines parallel to axis of cathode
TRUE
FALSE

⇒ The function δ (t - b) is a
unit impulse
unit step
unit doublet
none of the above

⇒

Assertion (A): Electrodynamic instrument is not used as ammeter or voltmeter.

Reason (R): Electrodynamic instrument is more costly than PMMC and moving iron instrument.

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

⇒ In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately be increased __________ times.
8
16
3
32

⇒ The work done in moving a charge Q on an equipotential line for a distance d will be
V/d
QV/d
Q.d
zero

⇒ Speech amplifiers are usually operated as
class A
classes AB
class B
class C

⇒ A thyristor has internal power dissipation of 40W and is operated at an ambient temperature of 20°C. If thermal resistance is 1.6° C/W, the junction temperature is
114°C
164°C
94° C
84° C

⇒ The resistance of a metallic wire would
increase as f increase
decrease as f increase
remains the same at all frequencies
increase with f up to a certain frequency and then decrease

⇒ Which one of the following is not a characteristic of a ferroelectric material?
High dielectric constant
No hysteresis
Ferroelectric characteristic only above the curie point
Electric dipole moment

⇒ Consider the following line 15
line 25
line 35
any of the lines 15 or 25, 35