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Q1. | Friction forces acts in a direction |

A. | opposite to that of velocity [Correct Answer] |

B. | same as that of velocity [Wrong Answer] |

C. | at right angle to that of velocity [Wrong Answer] |

D. | partly opposite and partly at right angle to the direction of velocity [Wrong Answer] |

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

⇒ A geostationary satellite is one which

hangs motionless in space about 36000 km about Earth

travels around the Earth in 24 hours

remains stationary above the Earth

appears stationary to everybody on Earth

⇒ While using Maxwell bridge, the Q factor of a coil is obtained as

1/ωCR

ωCR

ωC/R

R/ωC

⇒ The term 'Poisson's ratio' is connected with

strain gauge

LVDT

Bourden tube

capacitance transducer

⇒ In the graph shown in the figure, for the tree with branches

*b*,

*d*and

*f*the fundamental loops would inclu

*abf, def, bdea*

*bdc, def, fba*

*abde, def, cdb*

*cea, bdea, abbf*

⇒ Antenna reciprocity is put to use in

radar system

commercial broadcast

TV broadcast system

none of the above

⇒ Which of the following is/are not a property/properties power spectral density function S

*x*(ω)?

S

*x*(ω) is real function of ω

S

*x*(ω) is a even function of ω

S

*x*(ω) is non-positive function of ωS

*x*(ω) ≤ 0 for all ω

All of the above

⇒ The binary number 101100.110 in octal number will be

152.6

154.6

145.6

174.6

⇒ The two terms used to describe performance of a directional coupler are

coupling and directivity

gain and coupling

gain and directivity

gain and isolation

⇒ The circuit shown in the figure has 4 boxes each described by inputs P, Q, R and outputs Y, Z

4 bit adder giving P + Q

4 bit subtractor giving P - Q

4 bit subtractor giving Q - P

4 bit adder giving P + Q + R

⇒ When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

scattering

polarisation

absorption

dispersion

⇒

Match the following:

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

A. | Ternary | 1. | 0, 1, 3 |

B. | Quaternary | 2. | 0, 1, 2, 3, 4, 5, 6 7, 8, 9, A, B |

C. | Quinary | 3. | 0, 1, 2, 3, 4 |

D. | Duodecimal | 4. | 0, 1, 2 |

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

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

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

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

⇒ Which of the following codes is based on BCD format?

EBCDIC

ASCII

Hollerith

both (a) and (b)

⇒ A triangular Pulse of 10 V peak is applied to a capacitor of 0.4 F. The change of the capacitor and its wavefor

8 rectangular

8 triangular

4 triangular

4 rectangular

⇒ An RLC series circuit has Q = 100 and ω

_{0}= 20 rad/sec. The bandwidth is

0.2 rad/sec

2 rad/sec

20 rad/sec

2000 rad/sec

⇒ A '

*n*' bit sequence generator employing SR flip-flop has maximum length of the sequence as :

2

^{n}*n*

2

*- 1*

^{n}2

^{n}^{-1}

⇒

Match the following:

List I (Operator) | List II (Description) | ||
---|---|---|---|

A. | ! = | 1. | Left shift |

B. | = = | 2. | Right Shift |

C. | < < | 3. | Equal to |

D. | > > | 4. | Not equal to |

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

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

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

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

⇒ 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

⇒ Which of the following does not characterize a ferromagnetic material?

Coercivity

Permeability

Permittivity

Reluctance

⇒ In 8085 microprocessor, even after a Reset operation which of the following interrupts remains enabled?

INTR

RST 5.5

RST 7.5

TRAP

⇒ Three resistances of 15 Ω, 10 Ω and 3 Ω are connected in parallel. The overall resistance is

less than 3 Ω

between 15 and 10 Ω

between 10 and 3 Ω

more than 3 Ω

⇒ In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

60°

90°

120°

180°

⇒ Find V

_{x}V

_{y}V

_{zVx = -6 Vy = 3 Vz = -3Vx = -6 Vy = -3 Vz = 1Vx = 6 Vy = 3 Vz = 3Vx = 6 Vy = 1 Vz = 3}

⇒ Which of the following exhibits negative resistance in a portion of its characteristics?

Tunnel diode

Zener diode

JFET

MOSFET and tunnel diode

⇒ A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is

500

5

0.014

0.002

⇒ Frequencies in the UHF range propagate by means of

space wave

surface waves

sky waves

ground waves

⇒ A voltage tripler circuit uses

2 diodes and 2 capacitors

3 diodes and 3 capacitors

2 diodes and 3 capacitors

3 diodes and 2 capacitors

⇒ If the temperature of on extrinsic semiconductor is increased so that the intrinsic carrier concentration is doubled, then

the majority carrier density doubles

the minority carrier density doubles

the minority carrier density becomes 4 times the original value

both majority and minority carrier densities double

⇒ Resistivity of metals consists of two parts, one part constant and the other temperature dependent.

TRUE

FALSE

⇒ If a signal

*g*(

*t*) has energy E, then the energy of the signal

*g*(2

*t*) is equal to ...

E/2

E/4

*E*

2E

⇒ Two coupled coils lie in parallel planes such that 50% of magnetic flux produced by one links the other. The coefficient of coupling is

0.5

0.25

0.125

0.5