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Q1. | How much r.m.s. current does a 300 W, 200 V bulb take from the 200V, 50 Hz power line? |

A. | 0.5 A [Wrong Answer] |

B. | 1.5 A [Correct Answer] |

C. | 0.0833333333333333 [Wrong Answer] |

D. | 0.125 [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ What is the decimal equivalent of the binary number shown in fourth row?

79

97

117

127

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | shift Register | 1. | Frequency division |

B. | Counter | 2. | Addressing in memory chips |

C. | Decoder | 3. | Serial to parallel Data conversion |

A-3, B-2, C-1

A-3, B-1, C-2

A-2, B-1, C-3

A-1, B-2, C-2

⇒ The slew rate of an ideal op-amp is

very slow

slow

fast

infinitely fast

⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform

all three are used in continuous time domain

all three are used in both continuous time domain and discrete time domain

Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain

Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain

⇒ Modulation system used for video-modulation in television broadcast is

SSB AM with carrier

SSB with carrier suppressed

DSB AM with carrier

a modified form of SSB with carrier called vestigial sideband

⇒ A TTL circuit with totem pole output has

high output impedance

low output impedance

very high output impedance

none of the above

⇒ The spectral component of noise associated with

*k*

^{th}frequency is given, in the limit as Δ

*f*→ 0 by

*n*(

_{k}*t*) written as

*n*(

_{k}*t*) = C

_{k}cos (2p

*k*Δ

*ft*+ θ

_{k1, 2 only1, 3 only1, 2, 32, 3 only}

⇒ The effective modulation index is:

0.91287

0.8306

1

none of these

⇒ 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)

⇒

Match the following:

List I (Bits operator in C) | List II (Meaning) | ||
---|---|---|---|

A. | ˜ | 1. | Bitwise XOR |

B. | & | 2. | Bitwise AND |

C. | | | 3. | Bitwise OR |

D. | U | 4. | One's complement |

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

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

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

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

⇒ A 4 bit transistor register has output voltage of high-low-high-low. The binary number stored and its decimal equivalent are

0101 and 5

0101 and 10

1010 and 5

1010 and 10

⇒ In a 3 phase full converter, the firing angle is less than 60°. The instantaneous output voltage

will have positive part only

will have both positive and negative parts

may have both positive and negative parts

will have negative part if load is inductive

⇒ A coil has resistance R and inductance L. At ω = ∞ the phase angle between voltage and current is

0°

180°

45°

90°

⇒ An electrodynamometer instrument has the advantage of

freedom from hysteresis and eddy currents because air cored coils are used

freedom from hysteresis and eddy currents because cores of coils have special ferromagnetic material

high torque/weight ratio

low cost

⇒ Wave guides are pressurised above normal atmospheric pressure for

increasing the power handling capacity

improving conductivity of walls

preventing higher modes from propagation

varying the wave impedance

⇒ In a class C operation V

_{CC}= 40 V and V

_{CE(sat)}= 0.4 V. The efficiency is

0.9

0.495

0.01

0.005

⇒ Select the correct relation

∇(AB) = A ∇ B + B ∇ A

∇ . (AB) = ∇ A . B + A ∇ B

∇ x (AB) = ∇ A x B + A ∇ B

All of the above

⇒ In an

*n*channel JFET, V

_{GS}= V

_{GS(off)}. Then

I

_{D}is zero

I

_{D}may be zero or positive

I

_{D}is positive

I

_{D}may be zero or negative

⇒ The response shown in figur

over damped

critically damped

under damped

either (a) or (c)

⇒ Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.

TRUE

FALSE

⇒ Maximum rectification efficiency for a half wave rectifier is

1

0.88

0.5

0.406

⇒ The effect of lead resistance is important in measurement of

resistance of shunt

resistance of shunt winding

resistance of ammeter

both (a) and (c)

⇒ The phase difference (

*j*ω -

*p*

_{1}) means

phasor drawn from

*p*

_{1}to

*j*ω

phasor drawn from origin to

*p*

_{1}

phasor directed from origin to

*j*ω point

phasor directed from

*j*ω to

*p*

_{1}

⇒ The commonly employed filter in SSB generation is

high pass filter

RC filter

LC filter

mechanical filter

⇒ An ideal op-amp requires

zero input offset voltage

low input offset voltage

high input offset voltage

infinite input offset voltage

⇒ The ac motor used in servo applications is

single phase induction motor

two phase induction motor

3 phase induction motor

synchronous motor

⇒ The contents of stack location 2109 H after the call operation wil

1111

1010101

100000

100010

⇒ In asynchronous TDM, for

*n*signal sources, each frame contains

*m*slots, where

*m*is usually

Less than

*n*

2

*n*

*n*

greater than 2

*n*

⇒ A signum function is

zero for

*t*greater than zero

zero for

*t*less than zero

unity for

*t*greater than zero

2∪(

*t*) - 1

⇒ As the temperature increases the mobility of electrons __________ .

decreases because the number of carries increases with increased collisions

increases because the number of carries decreases with decreased collisions

remains same

none of the above