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Q1. | For a given voltage, four heating coils will produce maximum heat when connected |

A. | all in parallel [Correct Answer] |

B. | all in series [Wrong Answer] |

C. | with two parallel pairs in series [Wrong Answer] |

D. | one pair in parallel with the other two in series [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ E

_{G}for silicon is 1.12 eV and that for germanium is 0.72 eV. Therefore, it can be concluded that

the conductivity of silicon will be less than that of germanium at room temperature

the conductivity of silicon will be more than that of germanium at room temperature

the conductivity of two will be same at 60°C

the conductivity of two will be same at 100°C

⇒

**Assertion (A):** The trigger circuit of a CRO is excited by the same signal as Y plates.

**Reason (R):** The time base generator develops a saw tooth voltage.

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

⇒ For most metals, Fermi level E

_{F}is less than

0.1 eV

2 eV

5 eV

10 eV

⇒ A direct radiating cone type loudspeaker attenuates :

medium range frequencies

very low frequencies

high frequencies

very low and high frequencies

⇒ The permanent magnet field system of brushless dc servo- motor is generally on

stator

rotor

partly on stator and partly on rotor

either (a) or (b)

⇒ Antenna used for T.V. broadcasting is

long dipole

metal horn

crossed dipole

log periodic

⇒ Material which lack permanent magnetic dipoles are known as

paramagnetic

diamagnetic

ferromagnetic

ferrimagnetic

⇒ In CE approximately, the active region is where the collector curves are

almost horizontal

almost vertical

inclined at 45°

inclined at 60°

⇒ The expression A ** B / C + D is equivalent to

AB / C + D

AB / C + D

AB / (C + D)

None of the above

⇒ A divide by 78 counters can be realized by using

six mod-13 counters

thirteen mod-6 counters

one mod 13 counter followed by one mod-6 counter

thirteen mod-13 counters

⇒ Hysteresis curve is associated with motion of domain walls.

TRUE

FALSE

⇒ The value of capacitor C for dynamic equalising circuit of series connected thyristors is determined by

forward characteristics of thyristors

reverse recovery characteristics of thyristors

both forward and reverse recovery characteristics of thyristors

none of the above

⇒ For Disk partitioning th DOS command is

F DISK

H DISK

A DISK

D DISK

⇒ If

*p*is the probability of success and

*q*is the probability of failure, then the probability that there are

*r*successes in

*n*trails is

^{n}

*c*

_{r}

*p*

^{r}*q*

^{n}

^{-}

^{r}

^{n}*c*

_{r}

*p*

^{n -}

^{r}*q*

^{r}^{n}

*c*

_{r}

*p*

^{r}*q*

^{n}

^{+}

^{r}

^{n}*c*

_{r}*p*

^{n}*q*

^{n}^{- r}

⇒ If X(

*z*) = (1 -

*a*)

*z*

^{-1}/[(1 -

*z*

^{-1})(1 -

*az*)] and 1 < |

^{-1}*z*|, the final value of

*x*

*is*

_{k}0

1

∞

2

⇒ Radio broadcasting is a familiar example of

space multiplexing

time multiplexing

frequency multiplexing

none of the above

⇒ A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is

dc

sinusoidal

rectangular

none of the above

⇒ The main advantage of CC amplifier is

High input impedance and low output impedance

Low input impedance and high output impedance

High voltage gain

High current gain

⇒ When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is

1

199

99

9.9

⇒ Beam width of an antenna is expressed in

metres

degrees

ratio of two powers

ratio of two angles

⇒ In a reactance function

all poles are simple

all poles and zeros are simple

all poles and zeros are simple and lie on

*j*ω axis only

all poles and zeros lie on negative real axis

⇒ In a positive-edge-triggered JK flip-flop, a low J and a low K produce __________ state. A high __________ on the rising edge of the clock.

inactive, reset

active, reset

active, toggle

inactive, toggle

⇒ Figure shows the self bias circuit for CE amplifier and its equivalent circuit. V

_{BB}and R

_{B}respectively

10 V and 4 k ohm

5 V and 4 k ohm

2 V and 4 k ohm

2 V and 10 k ohm

⇒ A dc chopper V = 500 V feeds an electric fraction dc series motor. The chopping frequency is 400 Hz. The series inductance required to limit the maximum current swing to 10 A is

20 mH

about 31 mH

about 51 mH

about 92 mH

⇒ In a 3 phase bridge inverter with 180° mode of operation the numbers of thyristors conducting at one time are

1

2

3

4

⇒ For a single phase half wave converter feeding a resistive load, the firing angle a. The waveshape in below figure is

output voltage

input voltage

voltage drop across thyristor

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 V

_{A}= - 10 V and V

_{B}= - 15 V, VAB = 5 V.

TRUE

FALSE

⇒ Consider the following statements about Rhombic antenna

- It is non resonant
- It is a broad band antenna
- It is ideally suited for HF transmission

1, 2, 3

1, 3 only

2, 3 only

1 only

⇒ In a 3 phase full converter feeding a highly inductive load, the average load current is 150 A. The peak current through thyristor is

150 A

75 A

50 A

300 A