List of top Physics Questions asked in JIPMER

A uniform wire of resistance R and length L is cut into four equal parts, each of length $L/4$, which are then connected in parallel combination. The effective resistance of the combination will be
A body cools from 50?C to 49?C in 5 seconds. How long will it take to cool from 40?C to 39?C? (Assume temperature of surrounding to be 30?C and Newton?s law of cooling is valid).
The frequency of a light wave in a material is $2 \times 10^{14} Hz$ and wavelength is $5000\, ?$. The refractive index of material will be
A block $B$ is pushed momentarily along a horizontal surface with an initial velocity $v$ . If $\mu$ is the coefficient of sliding friction between $B$ and the surface, block $B$ will come to rest after a time
In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential $V$ and then made to describe semicircular paths of radius $R$ using a magnetic field $B$. If $V$ and $B$ are kept constant, the ratio $\left(\frac{\text { charge on the ion }}{\text { mass of the ion }}\right)$ will be proportional to
Two radioactive substances $A$ and $B$ have decay constants $5\, \lambda$ and $\lambda$ respectively. At $t=0$ they have the same number of nuclei. The ratio of number of nuclei of $A$ to those of $B$ will be $\left(\frac{1}{e}\right)^{2}$ after a time interval
Three resistances $P, Q, R$ each of $2\, \Omega$ and an unknown resistance $S$ form the four arms of a Wheatstone's bridge circuit. When a resistance of $6\, \Omega$ is connected in parallel to $S$ the bridge gets balanced. What is the value of $S$ ?
If energy E, velocity v and time T are taken as fundamental quantities, the dimensional formula for surface tension is
A charged particle (charge $q$ ) is moving in a circle of radius $R$ with uniform speed $v$. The associated magnetic moment $\mu$ is given by
A galvanometer having a coil resistance of $ 60O $ shows full scale deflection when a current of 1.0 A passes through it. It can be converted unto an ammeter to read currents upto 5.0 A by
A steady current of $1.5\, A$ flows through a copper voltameter for 10 min. If the electrochemical equivalent of copper is $30 \times 10^{-5}\, g\, C ^{-1}$, the mass of copper deposited on the electrode will be
A particle executes simple harmonic oscillation with an amplitude $a$. The period of oscillation is $T$ . The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is
Two spherical conductors $B$ and $C$ having equal radii and carrying equal charges in them repel each other with a force $F$ when kept apart at some distance. A third spherical conductor having same radius as that of $B$ but uncharged, is brought in contact with $B$, then brought in contact with $C$ and finally removed away from both. The new force of repulsion between $B$ and $C$ is
Diwali rocket is ejecting $50\, g$ of gasses at a velocity of $400 \,m/s$ . The accelerating force on the rocket will be
A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is $4\,D$ , the power of a cut lens will be
In radioactive decay process, the negatively charged emitted $\beta-$ particles are
A transformer is used to light a $100\, W$ and $110\, V$ lamp from a $220\, V$ mains. If the main current is $0.5\, A$, the efficiency of the transformer is approximately
A car moves from $X$ to $Y$ with a uniform speed $v_{u}$ and returns to $Y$ with a uniform speed $v_{d}$. The average speed for this round trip is
Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius $R$ with constant speed $v$ . The time period of the motion
When power is drawn from the secondary coil of the transformer, the dynamic resistance
The area of the acceleration-displacement curve of a body gives
Two glass plates are separated by water. If surface tension of water is $75$ dyne/cm and area of each plate wetted by water is $8\, cm ^{2}$ and the distance between the plates is $0.12 \,mm$, then the force applied to separate the two plates is
What is X in the following nuclear reaction? ${ }_{7} N ^{14}+{ }_{1} H ^{1} \longrightarrow{ }_{8} O ^{15}+X$
Which one of the following statements is true?
What is not true for equipotential surface for uniform electric field?