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Q1. | In VHS format diameter of head drum is about |

A. | 1 m [Wrong Answer] |

B. | 20 cm [Wrong Answer] |

C. | 6 cm [Correct Answer] |

D. | 1 cm [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Which one of the following circuits is used for converting a sine wave into a square wave?

Astable multivibration

Monostable multivibration

Bistable multivibration

Schmitt trigger

⇒ The system of the given fi

is unstable for all values of K

is stable for all values of K

can be stable for some values of K

data is insufficient to determine stability

⇒ For measuring mutual inductance we can use

Anderson bridge

Maxwell's bridge

Heaviside bridge

Either (a) or (b)

⇒ In a 741 OP-amp, there is 20 dB/decade fall-off starting at a relatively low frequency. This is due to

applied load

internal compensation

impedance of the source

power dissipation in the chip

⇒ Which of these has 3 layers?

PIN diode

Zener diode

Schottky diode

Photo diode

⇒ In figure, the switch is closed at

*t*= 0. At

*t*= 0

^{+},

*di*/

*dt*= 4 A/s. Then

10 V

20 V

40 V

80 V

⇒ In a CE amplifier, the collector resistance is 6 kΩ and load resistance is 3 kΩ. The ac load resistance is

9 kΩ

6 kΩ

3 kΩ

2 kΩ

⇒ Consider the common emitter amplifier shown below with the following circuit parameters: β = 100,

*g*= 0.3861 A/V,

_{m}*r*

_{0}= ∞

*r*= 259 Ω, R

_{p}_{s}= 1 kΩ, R

_{B}= 93 kΩ, R

_{C}= 250 Ω, R

_{L}= 1 kW, C

_{1}= ∞ and C

_{2}= 4.

33.9 Hz

27.1 Hz

13.6 Hz

16.9 Hz

⇒ In figure, V

_{1}= 40 V when R = 10 Ω, if R = 0, V

_{2}wil

40 V

30 V

20 V

10 V

⇒ For pole-zero plot shown, the system is ________

minimum phase

maximum phase

mixed phase

none of these

⇒ Three point tracking is achieved with

double conversion

padder capacitor

double spotting

variable selectivity

⇒ Two passive elements are connected in series and a dc voltage is applied to the circuit. The time variation of the current is shown in figure. The two elements

one resistance and the other inductance

both resistances

one inductance and the other capacitance

one resistance and the other capacitance

⇒ Under low level injection assumption, the infected minority carrier current for an extrinsic semiconductor is essentially the

diffusion current

drift current

recombination current

induced current

⇒ As B is increased from zero to about 2T, μ

_{r}, of a ferromagnetic material

increase

decrease

first increases then decreases

remains the same

⇒

**Assertion (A):** If an atom of polarizability a is placed in homogeneous field E, the energy stored is 0.5 aE^{2}.

**Reason (R):** Capacitance of an isolated conducting sphere R in vacuum is 4 p∈_{0} R farads.

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 but R is false

A is false but R is true

⇒ In position control system the device used for providing rate feedback voltage is

potentiometer

synchro-transmitter

synchro-transformer

tacho generator

⇒ In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on the 60W lin

1

1.64

2.5

3

⇒ In the circuit shown, the power supplied by the voltage so

0 W

5 W

10 W

100 W

⇒ For a periodic waveform, the power spectral density and correlation function form

a Laplace transform pair

a Fourier transform pair

either (a) or (b)

neither (a) nor (b)

⇒ An ideal rectifier should have

100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor

100% efficiency, zero tipple factor, zero harmonic factor and zero displacement factor

100% efficiency, zero ripple factor, unity harmonic factor and unity displacement factor

100% efficiency, unity ripple factor, zero harmonic factor and unity displacement factor

⇒ An air gap provided in the iron core of an inductor prevents

flux leakage

hysteresis loss

core saturation

heat generation

⇒ A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be

0.5 A

more than 0.5 A

less than 0.5 A

0.5 A or less

⇒ Which of the following has the highest input impedance?

CE

CB

CC

Push pull

⇒ Binary number 11011.01 when converted to its 2's complement will become

101.11

1111.1

1100.1

100.11

⇒ The primary constants of a transmission line are

R and L

R, L and C

R and C

R, L, G and C

⇒ In the above case, what will be the value of capacitor to obtain 100 kHz frequency?

0.0065 pF

0.0130 pF

0.0260 pF

0.520 pF

⇒ The velocity of sound waves in air

is constant at all temperatures

varies directly as temperature

varies inversely as absolute temperature

varies directly as square root of absolute temperature

⇒ A rectangular waveguide (2.29 x 1.02) cm operates at a freq. of 11 GHz in TE

_{10}mode. If the maximum potential gradient of the signal is 5 kV/cm, then the maximum power handling capacity of the waveguide will be

31.11 mW

31.11 W

31.11 kW

31.11 MW

⇒

**Assertion (A):** When reverse voltage across a *p*-*n* junction is increased, the junction capacitance decreases.

**Reason (R):** Capacitance of any layer is inversely proportional to thickness.

Both A and R are true and R is correct explanation of A

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

A is true but R is false

A is false but R is true

⇒ The transfer function V

_{2}/V

_{1}for figure

a zero at origin

a zero at infinity

no zero

a zero at

*j*1