A body is said to be under forced vibrations, when

Statement: Resonance is a special case of forced vibration in which the nature and frequency of vibration of the body are the same as the impressed frequency and the amplitude of forced vibration, is maximum. Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force.

A

Both statement and reason are true and the reason is the correct explanation of the statement

B

Both statement and reason are true but the reason is not the correct explanation of the statement

C

Statement is true, but the reason is false

D

Statement and reason are false

In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.

A

Equal to

B

Directly proportional to

C

Inversely proportional to

D

Independent of

In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient.

A

equal to

B

directly proportional to

C

inversely proportional to

D

independent of

True breeding Drosophila flies with curved wings and dark bodies were mated with true breeding short wings and tan body Drosophila, The F₁ progeny was observed to be with curved wings and tan body. The F₁ progeny was again allowed to breed and produced flies of the following phenotype, 45 curved wings tan body, 15 short wings tan body, 16 curved wings dark body and, 6 short wings dark body. The mode of inheritance is

A

Typical Mendelian with curved wings and tan body being dominant

B

Typical non-Mendelian with curved wings and tan body not following any pattern

C

Mendelian with suppression of phenotypes

D

Mendelian with single crossover

The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body and $$\delta $$ = Static deflection of the body)

A

$$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{s}}}{{\text{m}}}} $$

B

$$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{g}}}{\delta }} $$

C

$$\frac{{0.4985}}{{\sqrt \delta }}$$

D

Any one of these

The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

A

More than

B

Less than

C

Same as

D

None of these

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of thesentences to form a coherent paragraph.
P- A sensitive mind easily absorbs the vibrations emanating from the thought of the people it associates with.
Q- We often say that a person is known by the company he keeps.
R- The violent can be made calm by exuding thought of love and compassion.
S- Visits to holy places are considered good because the good thoughts of the holy people gathered there and the ensuing vibrations definitely
affect one in a positive fashion.

A

RQPS

B

QRSP

C

PQRS

D

SRQP

X, a blacksmith, is seized by a gang of dacoits and forced, by threat of instant death to take his tools and forced him to open the door of Y's house. The dacoits then looted Y's money and jewels and also killed Y's son Z. What offence, among the following offences under Indian Penal Code, 1860 has been committed by X?

A

Dacoity with murder

B

Abetment of dacoity and murder

C

No offence

D

Preparation to commit dacoity

E

None of the above

In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as

A

Critical damping ratio

B

Damping factor

C

Logarithmic decrement

D

Magnification factor

In FEM, the forced vibrations equation after Finite Element discretization of a structure can be expressed as which option?

A

Mẍ+Kẋ=F

B

Mẍ+Kẋ=0

C

Mẍ+Kx=F

D

Mẍ+Kx=0

A body is said to be under forced vibrations, when

Related Questions