List of top Physics Questions

Two forces of equal magnitude $F$ act at a point. If the angle between them is $?$, then the magnitude of the resultant force is
Two exactly similar wires o f steel $(y=20 \times 10^{11}\, dyne/cm^2)$ and copper $(y=12 \times 10^{11}\, dyne/cm^2)$are stretched by equal forces. If the total elongation is 1cm, elongation of copper wire is
Two equally charged identical metal spheres A and B repel each other with a force F. Another identical uncharged sphere C is touched to A and then placed midway between A and B. The net force on C is in the direction
Two electric bulbs, one of $200\, V$, $40\, W$ and other of $200\,V$, $100 \,W$ are connected in a domestic circuit. Then
Two discs have same mass and thickness. Their materials have densities $d_1$ and $d_2$, then their MOl about central axis will be
Two discs of moments of inertia $I_1$ and $I_2$ about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed $\omega_1$ and $\omega_2$ are brought into contact face to face with their axes of rotation coinciding with each other. What is the loss in kinetic energy of the system in the process?
Two curs 1 & 2 starting from rest are moving With speeds $V_1$ and $V_2 \,m/s (V_1 > V_2)$ Car 2 is ahead of car '1' by s meter when the driver of the car 1 sees car '2'. What minimum retardation should be given to car '1' to avoid collision
Two coplanar concentric circular coils have radii and Both have the same number of turns ''n''. The smaller coil carries a clock wise current ''i'', while the larger coil carries an anticlockwise current ''2i''. The magnetic field induction at the centre is
Two circular, similar, coaxial loops carry equal currents in the same direction. If the loops are brought nearer, what will happen?
Two coils of inductances $L_1$, and $L_2$ are linked such that their mutual inductance is M
Two coils are at fixed locations. When coil 1 has no current and the current in coil 2 increases at the rate of 15.0 A/s, the emf in coil 1 is 25.0 mV, when coil 2 has no current and coll 1 has a current of 3.6 A, the flux linkage in coil 2 is
Two charges $q$ and $-3q$ are fixed on $x$-axis separated by distance $d$. Where should a third charge $2q$ be placed from $A$ such that it will not experience any force?
Two circular loops of radius $R$ and $nR$ are made from same curve. The moment of inertia about an axis passing through centre and normal to plane of large loop is $8$ times that of smaller loop. The value of $n$ is
Two charges of magnitude $5\, nC$ and $-2\, nC$, one placed at points $(2\, cm, 0,\, 0)$ and $(x \,cm, 0, 0)$ in a region of space, where there is no other external field. If the electrostatic potential energy of the system is $-0.5 \, \mu J$. The value of $x$ is
Two capillaries of same length and radii in the ratio $1 : 2$ are connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is $1 \,m$ of water, the pressure difference across first capillary is
Two cars are travelling towards each other on a straight road at Velocities 15 m/s and 16 m/s respectively. When they are 150m apart, both the drivers apply the brakes and the cars decelerate at $3 m/s^2\, and \,4 m/s^2$ Until they stop. Separation between the cars when they come to rest is
Two charged conducting spheres of radii $a$ and $b$ are connected to each other by a wire. The ratio of electric fields at the surfaces of two spheres is
Two capacitors of capacitances $C_1$ and $C_2$ are connected across $200 \,V$ power supply. The potential drop across $C_1$ is $120\, V. A$ capacitor of capacitance $2\,\mu F$ is connected in parallel with $C_1$ and the potential drop across $C_2$ becomes $160\, V$. What are the values of $C_1$ and $C_2$ in $\mu F$ ?
Two bulbs marked 60 W, 220 V and 100 W, 220 V are connected in series and the series combination is now connected across a 220 V main supply. The power dissipiated in the circuit is
Two bodies with kinetic energies in the ratio $4 : 1$ are moving with same linear momenta. The ratio of their masses is
Two bodies of different masses $m_a \, and \, m_b$ are allowed to fall from different heights $a$ and $b$. The ratio of time taken by the two to cover these distances are
Two bodies begin to fall freely from the same height. The second one begins to fall $\tau$ s after the first. The time after which the 1st body begins to fall, the distance between the bodies equals to $l$ is
Two blocks each of mass $m$ is connected to the spring of spring constant $k$ as shown In the figure.
If the blocks are displaced slightly In opposite directions and released, they will execute simple harmonic motion. The time period of oscillation is
Two balls are projected simultaneously with the same velocity u from the top of a tower, one vertically upwards and the other vertically downwards. Their respective times of the journeys are $t_1 $ and $ t_2$ . At the time of reaching the ground, the ratio of their final velocities is
Two absolute scale $A$ and $B$ have triple points of water defined to be at $200 \,A$ and $350\, B$. The relation between $T_A$ and $T_B$ is