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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
Explanation:-
Answer : ADiscuss 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 :**

⇒ In a CE amplifier, the output voltage is equal to product of

ac collector current and ac collector resistance

ac base current and ac collector resistance

ac emitter current and ac emitter resistance

ac collector current and source resistance

⇒ Which of the following microphones works on the piezoelectric effect?

Carbon

Condenser

Moving coil

Crystal

⇒ Let JCOKE = 98 and LPEPSI = 42 Consider the statement

106

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none of the above

⇒ The relative permeability is taken as unity for which of the following?

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⇒

Match the following:

List I (Operation in Basic) | List II (Priority) | ||
---|---|---|---|

A. | Exponentiation | 1. | 1 |

B. | Multiplication and division | 2. | 2 |

C. | Addition and subtraction | 3. | 3 |

D. | Expression within parenthesis | 4. | 4 |

A-1, B-2, C-3, D-4

A-2, B-3, C-1, D-4

A-4, B-3, C-2, D-1

A-2, B-3, C-4, D-1

⇒ Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

TRUE

FALSE

⇒ The current flowing in a certain P-N junction at room temperature is 2 x 10

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9 μA

10 μA

2 μA

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⇒ A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

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100

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⇒ During testing of an energy meter, the energy recorded by meter was 0.05 kWh and correct energy was found to be 0.09 kWh. The error and correction respectively are

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0.01 kWh and -0.01 kWh

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⇒ In a P-N-P transistor, with normal bias, the emitter junction

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⇒ A signal

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*t*) amplitude modulates a carrier A

*cos ω*

_{c}*. The final signal will be*

_{c}t[A

_{c}*m*(

*t*)] cos ω

*]*

_{c}tA

*. [1 +*

_{c}*m*(

*t*)] cos ω

_{c}tA

*+ [*

_{c}*m*(

*t*)] cos ω

_{c}tA

*cos ω*

_{c}*+*

_{c}t*m*(

*t*)

⇒ An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 Ω. The standing wave ratio will be

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⇒ Figure shows the terminals of a transistor in plastic package TO 18. T

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terminals 1, 2, 3 are emitter, base, collector respectively

terminals 1, 2, 3 are base, emitter collector, respectively

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⇒ Television transmission is by

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sky waves

space waves

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⇒ The number of logic or arithmetic operations with

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16

32

⇒ The effective refraction index of the ionosphere for radio wave is

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less than unity

equal to unity

either more or less than unity depending on the electron concentration

⇒ For an insulating material, dielectric strength and dielectric losses should be

high and high

low and high

high and low

low and low

⇒ The standard deviation of a set of observations is the rms value of the deviation from the arithmetic mean.

TRUE

FALSE

⇒ In figure, E = 1 V (rms value). The average power is 250 mW. Then phase angle between E and

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⇒ If a 'live' conductor of a public supply touches earth metal

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⇒ If operator '

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⇒ The merging of a hole and an electron is called

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⇒ The sum of 1110101

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⇒ An accelerometer has a seismic mass of 0.05 kg and spring constant of 3 x 10

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⇒ When performing numerical calculations in floating point arithmetic

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All

1 and 2 only

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⇒ A 1 μF capacitor is connected to 12 V battery. The energy stored in the capacitor is

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⇒ When temperature is more than ferromagnetic curie temperature, the behaviour of a ferromagnetic material is similar to that of paramagnetic material.

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⇒ PAM stands for

Pulse Analogue Modulation

Phase Analogue Modulation

Pulse Amplitude Modulation

Phase Amplitude Modulation