List of top Physics Questions asked in KEAM

An ammeter, voltmeter and a resistor are connected in series to a cell and the readings are noted as $I$ and $V$ . If another resistor $R$ is connected in parallel with voltmeter, then
In a closed circuit, the current $ I $ (in ampere) at an instant of time $t$ (in second) is given by $ I=4-0.08t $ . The number of electrons flowing in $ 50\, s $ through the cross-section of the conductor is
In a potentiometer experiment, when three cells $A, B$ and $C$ are connected in series the balancing length is found to be $740\, cm$. If $A$ and $B$ are connected in series balancing length is $440\, cm$ and for $B$ and $C$ connected in series that is $540 \,cm$. Then the emf of $ {{E}_{A}},{{E}_{B}} $ and $ {{E}_{C}} $ are respectively (in volts)
In a potentiometer of wire length $l$, a cell of emf $V$ is balanced at a length $\frac{l}{3}$ from the positive end of the wire. For another cell of emf $1.5\,V$, the balancing length becomes
In the figure shown below, the terminal voltage across $ {{E}_{2}} $ is
Nichrome is used as electrical heating element because of its
When two resistances $ {{R}_{1}} $ and $ {{R}_{2}} $ are connected in series, they consume $ 12 \,W $ power. When they are connected in parallel, they consume $ 50\, W $ power. What the ratio of the powers of $ {{R}_{1}} $ and $ {{R}_{2}} $ ?
Two resistors of resistances $ 200\,k\Omega $ and $ 1\,M\Omega $ respectively form a potential divider with outer junctions maintained at potentials of $ +3V $ and $ -15V $ . Then, the potential at the junction between the resistors is
If the length of seconds pendulum is increased by 2%, then in a day the pendulum
The motion which is not simple harmonic is
If the differential equation for a simple harmonic motion is $\frac{d^2 y}{dt^2} + 2 y = 0$, the time-period of the motion is
The total energy of the particle executing simple harmonic motion of amplitude $A$ is $100 \,J$. At a distance of $0.707\, A$ from the mean position, its kinetic energy is
A massless spring of length $l$ and spring constant $k$ is placed vertically on a table. A all of mass m is just kept on top of the spring. The maximum velocity of the ball is
In the given diagram S$_1$ and S$_2$ are identical springs. The frequency of oscillation of the mass III is.f If one of the springs is removed. the frequency will be
If x, v and a denote the displacement, the velocity and the acceleration of a particle executing simple harmonic motion of time period T, then which of the following do not change with time?
For a simple pendulum, the graph between $ {{T}^{2}} $ and $ L $ is
Which of the following is not characteristics of simple harmonic oscillation?
An uncharged parallel plate capacitor filled with a dielectric of dielectric constant $K$ is connected to an air filled identical parallel capacitor charged to potential $V_1$. If the common potential is $V_2$, the value of $K$ is
A solenoid has core of a material with relative permeability $500$ and its windings carry a current of $1\, A$. The number of turns of the solenoid is $ 500\text{ }{{m}^{-1}} $ . The magnetization of the material is nearly
The vertical component of velocity of a projectile at its maximum height ($u =$ velocity of projection, $\theta =$ angle of projection) is
Two taps supply water to a container, one at the temperature of $20^{\circ}C$ at the rate of $2 \,$kg/minute and another at $80^{\circ}C$ at the rate of $1$ kg/minute. If the container gets water from the two taps simultaneously for $10$ minutes, then the temperature of water in the container is
The control rods used in a nuclear reactor can be made up of
The angle of dip at a place is $ {{37}^{o}} $ and the vertical component of the earths magnetic field is $ 6\times {{10}^{-5}}T. $ The earths magnetic field at this place is $ (tan\text{ }{{37}^{o}}=3/4) $
Which of the following statements is not a property of nuclear force?
What is the escape velocity for a body on the surface of a planet on which the acceleration due to gravity is $(3.1)^2 ms^{-2}$ and whose radius is 8100 km?