List of top Physics Questions asked in AIIMS

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : A spherical equipotential surface is not possible for a point charge.

Reason (R) : A spherical equipotential surface is possible inside a spherical capacitor.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : A wire bent into an irregular shape with the points \(P\) and \(Q\) fixed. If a current \(I\) passed through the wire, then the area enclosed by the irregular portion of the wire increases. 

Reason (R) : Opposite currents carrying wires repel each other.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : An astronaut in an orbiting space station above the earth experience weightlessness.

Reason (R) : An object moving around the earth under the influence of earth's gravitational force is in a state of 'free fall'.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : In a meter bridge experiment, null point for an unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance. 

Reason (R) : Resistance of metal increases with increase in temperature.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion \((A)\) : In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision.

Reason \((R)\) : In an elastic collision, the linear momentum of the system is conserved.

In the light of the above statements, choose the correct answer from the options given below
 

The half-life of radium is $1600$ years. What is the fraction of sample undecayed after $6400$ years?
Young?? modulus for a steel wire is $2 \times 10^{11}\, Pa$ and its elastic limit is $2.5 \times 10^8\, Pa$. By how much can a steel wire 3 m long and $2 \,mm$ in diameter be stretched before the elastic limit is exceeded?
The near point and far point of a person are $40\, cm$ and $250 \,cm$ respectively. Determine the power of the lens he/she should use while reading a book kept at distance $25 \,cm$ from the eye.
The current gain for a transistor working as common-base amplifier is $0.96$. If the emitter current is $7.2\, mA$, then base current is
The angles of dip at the poles and the equator respectively are
Photoelectric effect supports quantum nature of light because
Photoelectric effect supports quantum nature of light because
Mutual inductance of two coils can be increased by
Use of ball bearings between two moving parts of a machine is a common practice. Ball bearings reduce vibrations and provide good stability
The speedometer of an automobile measures the average speed of the automobile. Average velocity is equal to total distance divided by total time taken.
In a common emitter transistor amplifier, the input current is much less than the output current than output impedance. The common emitter transistor amplifier has higher input impedance than output impedance
A secondary rainbow have inverted colours than the primary rainbow. The secondary rainbow is formed by single total internal reflection.
A string $0.5\, m$ long is used to whirl a $1\,kg$ stone in a vertical circle at a uniform velocity of $5 \,m \,s^{-1}$. What is the tension in the string when the stone is at the top of the circle?
The angles of dip at the poles and the equator respectively are
A hemispherical bowl of radius $r$ is set rotating about its axis of symmetry in vertical. A small block kept in the bowl rotates with the bowl without slipping on its surface. If the surface of the bowl is smooth and the angle made by the radius through the block with the vertical is $\theta$, then find the angular speed at which the ball is rotating.
In terms of basic units of mass $(M)$, length $(L)$, time $(T) $ and charge $(Q)$, the dimensions of magnetic permeability of vacuum $(\mu_0)$ would be
A semiconductor having electron and hole mobilities $\mu_{n}$ and $\mu_{p}$ respectively. if its intrinsic carrier density is $n_{i}$, then what will be the value of hole concentration $P$ for which the conductivity will be minimum at a given temperature?
A massless rod $S$ having length $2 l$ has equal point masses attached to its two ends as shown in figure. The rod is rotating about an axis passing through its centre and making angle $\alpha$ with the axis. The magnitude of change of momentum of rod i.e. $\left|\frac{d L}{d t}\right|$ equals
Two spherical nuclei have mass numbers $216$ and $64$ with their radii $R_{1}$ and $R_{2}$ respectively. The ratio, $\frac{R_{1}}{R_{2}}$ is equal to
The Boolean expression $P+\bar{P} Q$, where $P$ and $Q$ are the inputs of the logic circuit, represents