List of top Physics Questions

Two parallel plates are separated by $2\,cm$. If the potential difference between them be $20\,V$, then electric field between them is :
Two parallel conducting plates of area $A = 2 .5 \,m^{2}$ each are placed $6\, mm$ apart and are both earthed. A third plate, identical with the first two, is placed at a distance of $2\, mm$ from one of the earthed plates and is given a charge of $1\, C$. The potential of the central plate is
Two non-ideal batteries are connected in parallel. Consider the following statements. (i) The equivalent emf is smaller than either of the two emfs. (ii) The equivalent internal resistance is smaller than either of the two internal resistance.
Two parallel and opposite forces each $5000\, N $ are applied tangentially to the upper and lower faces of a cubical metal block of side $25 \,cm$. The angle of shear is (The shear modulus of the metal is $80 \,GPa$.)
Two moles of helium gas undergo a cyclic process as shown in figure. Assuming the gas to be ideal, the net work done by the gas is
Two masses $'m_1'\,and\,'m_2'(m_1>m_2)$ connected to the ends of a light inextensible string which passes over the surface of a smooth fixed pulley. If the system is released from rest, the acceleration of the center of mass of the system will be (g =acceleration due to gravity)
Two masses of $10\,kg$ and $5\,kg$ are suspended from a rigid support as shown in figure. The system is pulled down with a force of $150\, N$ attached to the lower mass. The string attached to the support breaks and the system accelerates downwards. If the downward force continues to act, the acceleration of the system is
Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude $16 \times 10^{-22}\, C\, m^{-2}$. The electric field between the plates is
Two lenses of power- 15 D and +5D are in contact with each other. The focal length of.the combination is
Two light strings of length 4 cm and 3 cm are tied to a bob of weight 500gm The free ends if the strings are tied to pegs in the same horizontal One and separated by 5cm. The ratio of tension the longer string to that in the shorter string is.
Two inductance coils made of different metal wires are having the same inductance . But their time constants are in the ratio 1 : 2. Then the ratio of their resistances is
Two inductors $ L_1$ and $L_2$ are connected in parallel and a time varying current flows as shown in figure. Then the ratio of currents $ i_1/i_2$ at any time t is
Two insulated charged spheres of radii $20\,cm$ and $25\,cm$ respectively and having an equal charge $Q$ are connected by a copper wire and then they are separated
Two inclined frictionless tracks, one gradual and the other steep meet at $A$ from where two stones are allowed to slide down from rest, one on each track as shown in figure. Which of the following statements is correct?
Two identical metallic spheres A and B of exactly equal masses are given equal positive and negative charges respectively.Then
Two identical charged particles enter a uniform magnetic field with same speed but at angles 30$^\circ$ and 60$^\circ$ with field. Let a , b and c be the ratio of their time periods, radii and pitches of the helical paths then:
Two identical cells connected in series send $10\,A$ current through a $5\Omega$ resistor. When they are connected in parallel, they send $8\,A$ current through the same resistance, the internal resistance of each cell is
Two identical metal spheres A and B are supported on insulating stands and placed in contact. What kind of charges will A and B develop when a negatively charged ebonite rod is brought near A?
Two identical capacitors are joined in parallel, charged to a potential $V$ , separated and then connected in series, the positive plate of one is connected to the negative of the other. Which of the following is true?
Two identical ball bearings in contact with each other and resting on a frictionless table are hit headon by another ball bearing of the same mass moving initially with a speed $V$ as shown in figure.
If the collision is elastic, which of the following is a possible result after collision?
Two identical balls $A$ and $B$ are released from the positions shown in the figure. They collide elastically on horizontal portion $MN$. The ratio of heights attained by $A$ and $B$ after collision will be (neglect friction)
Two identical bar magnets each of dipole moment $p_m$ and length l are perpendicular to each other as shown in the figure. The dipole moment of the combination is
Two forces whose magnitudes are in the ratio 3:5 give a resultant of 35N. If the angle between them is $60^\circ$, the magnitude of each force is.
Two $H$ atoms in the ground state collide inelastically. The maximum amount by which their combined kinetic energy is reduced is
Two heater wires of equal length are first connected in series and then in parallel. The ratio of heat produced in the two cases is