List of practice Questions

In an isothermal process
In a closed hall of volume \(5000\ \text{m}^3\), the total absorption of the interior surfaces is \(200\) metric sabin. The reverberation time is
If the volume of a room is doubled and the total absorption is halved, the reverberation time will
In acoustics, “Noise” is generally characterized by
A source of sound of frequency \(500\ \text{Hz}\) is moving towards an observer with velocity \(30\ \text{m/s}\). The speed of sound is \(330\ \text{m/s}\). The frequency heard by the observer will be
Two identical piano wires, when tuned to a fundamental frequency of \(400\ \text{Hz}\), produce no beats. One wire is then slightly tightened, and the beat frequency heard is \(2\ \text{Hz}\). What is the new fundamental frequency of the tightened wire?
A pump is used to deliver water at a certain rate from a given pipe. To obtain twice the volume of water from the same pipe in the same time, by what factor must the power of the motor pump be increased? Assume ideal conditions.
Power supplied to a particle of mass \(2\ \text{kg}\) varies with time as \[ P=\frac{3t^2}{2}\ \text{watt}, \] where \(t\) is in seconds. If velocity at \(t=0\) is zero, the velocity at \(t=2\ \text{s}\) is
The potential energy of a particle is given by \(U(x)=20+(x-2)^2\), where \(U\) is in joules and \(x\) is in meters. The minimum potential energy and the position where it occurs are
A body of mass \(1\ \text{kg}\) starts moving from rest under the action of a force which varies with displacement as \(F=2x+5\) in newtons. The work done by this force to displace the body from \(x=0\) to \(x=2\ \text{m}\) is
With what speed should a body be thrown upwards so that the distances covered in the \(5^{th}\) second and \(6^{th}\) second are equal?
A body falling from height \(H\) takes time \(T\) seconds to reach the ground. The time taken to cover the second half of height is
The magnitudes of three vectors \(\vec A,\vec B,\vec C\) are \(12,5\), and \(13\) units respectively and \(\vec A+\vec B=\vec C\). The angle between \(\vec A\) and \(\vec B\) is
The ratio between maximum and minimum values of two vectors \(\vec A\) and \(\vec B\), where \(A>B\), is \(4:1\). Then the ratio between the magnitudes of two vectors is
An aeroplane is moving in a circular path with a speed of \(450\ \text{kmph}\). What is the change in velocity in half revolution?
If \(|\vec A+\vec B|=|\vec A-\vec B|\), then the angle between the two vectors \(\vec A\) and \(\vec B\) is
If velocity \(V\), energy \(E\), and time \(T\) are chosen as fundamental quantities, then dimensional representation of surface tension in this system will be
If \(P=Fv\sin\beta t\), where \(F\) is force and \(v\) is velocity, then the dimensions of \(P\) and \(\beta\) are
Electronic configuration of copper can be represented as

Match the electromagnetic waves in Column I with their common applications in Column II. 

Column IColumn II
(A)Gamma rays(I)Radar communication
(B)X-rays(II)Cancer treatment
(C)Microwaves(III)Bone imaging
(D)Radio waves(IV)Broadcasting

Choose the correct answer from the options given below:

Match the following conservation strategies with their corresponding examples. 

Column IColumn II
(A)Ex-situ Conservation(I)Biosphere Reserve
(B)In-situ Conservation(II)Wildlife Sanctuary
(C)Gene Bank(III)Cryopreservation
(D)Botanical Garden(IV)Conservation outside natural habitat

Choose the correct answer from the options given below:

Match the structural genes of the Lac Operon in Column I with their functions in Column II. 

Column IColumn II
(A)lacZ(I)Permease
(B)lacY(II)Transacetylase
(C)lacA(III)\(\beta\)-galactosidase

Choose the correct answer from the options given below:

Match the electromagnetic waves in Column I with their common applications in Column II. 

Column IColumn II
(A)Gamma rays(I)Radar communication
(B)X-rays(II)Cancer treatment
(C)Microwaves(III)Bone imaging
(D)Radio waves(IV)Broadcasting

Choose the correct answer from the options given below:

Match the following media organizations with their primary functions. 

Column IColumn II
(A)Press Trust of India (PTI)(I)Public Service Broadcasting
(B)Prasar Bharati(II)News Agency
(C)All India Radio (AIR)(III)Radio Broadcasting
(D)Doordarshan(IV)Television Broadcasting

Choose the correct answer from the options given below:

Fill in the blank by choosing the correct option. 

The communication model proposed by Harold Lasswell is represented as:

\[ \text{Who} \rightarrow \text{Says What} \rightarrow \underline{\hspace{2cm}} \rightarrow \text{To Whom} \rightarrow \text{With What Effect} \]