List of top Physics Questions asked in JEE Main

A body of mass 10 kg is projected at an angle of 45° with the horizontal. The trajectory of the body is observed to pass through a point (20, 10). If T is the time of flight, then its momentum vector, at time t = T/√2, is _________.
[Take g = 10m/s²]

Two bodies of masses m₁ = 5 kg and m₂ = 3 kg are connected by a light string going over a smooth light pulley on a smooth inclined plane as shown in the figure. The system is at rest. The force exerted by the inclined plane on the body of mass m₁ will be
[Take g = 10 ms^–2]

Two bodies of masses m1 = 5 kg and m2 = 3 kg are connected by a light

If the charge on a capacitor is increased by 2 C, the energy stored in it increases by 44%. The original charge on the capacitor is (in C)

Two electric dipoles of dipole moments 1.2 × 10^–30 C-m and 2.4 × 10^–30 C-m are placed in two different uniform electric fields of strength 5 × 10⁴ NC^–1 and 15 × 10⁴NC^–1 respectively. The ratio of maximum torque experienced by the electric dipoles will be 1:x. The value of x is _______

A 1 m long wire is broken into two unequal parts X and Y. The X part of the wire is stretched into another wire W. Length of W is twice the length of X and the resistance of W is twice that of Y. Find the ratio of length of X and Y.

A ball of mass m is thrown vertically upward. Another ball of mass 2 m is thrown at an angle θ with the vertical. Both the balls stay in air for the same period of time. The ratio of the heights attained by the two balls respectively is 1/x. The value of x is _______.

Match List-I with List-II.

	List - I		List - II
A.	Moment of inertia of solid sphere of Radius R about any tangent	i.	$\frac{5}{3}MR^2$
B.	Moment of inertia of hollow sphere of radius (R) about any tangent	ii.	$\frac{7}{5}MR^2$
C.	Moment of inertia of circular ring of radius (R) about its diameter	iii.	$\frac{1}{4}MR^2$
D.	Moment of inertia of circular disc of radius (R) about any diameter	iv.	$\frac{1}{2}MR^2$

Choose the correct answer from the options given below.

A uniform electric field E = (8m/e) V/m is created between two parallel plates of length 1 m as shown in figure, (where m = mass of electron and e = charge of electron). An electron enters the field symmetrically between the plates with a speed of 2 m/s. The angle of the deviation (θ) of the path of the electron as it comes out of the field will be_______.

A block of mass 40 kg slides over a surface, when a mass of 4 kg is suspended through an inextensible massless string passing over a frictionless pulley as shown below.
The coefficient of kinetic friction between the surface and block is 0.02. The acceleration of the block is (Given g = 10 ms^–2)

Two vectors $\overrightarrow{A}+\overrightarrow{B}$ have equal magnitudes. If magnitude of $\overrightarrow{A}+\overrightarrow{B}$ is equal to two times the magnitude of $\overrightarrow{A}-\overrightarrow{B}$ then the angle between vec A and $\overrightarrow{B}$ will be

Consider a cylindrical tank of radius $1 m$ is filled with water. The top surface of water is at $15 m$ from the bottom of the cylinder. There is a hole on the wall of cylinder at a height of $5 m$ from the bottom. A force of $5 × 10^5 N$ is applied on the top surface of water using a piston. The speed of efflux from the hole will be:

(Given atmosphere pressure $P_A = 1.01 × 10^5 Pa$, density of water $ρ_w 1000 Kg/m^3$ and gravitational acceleration $g = 10 m/s^2$)

The magnetic field of a plane electromagnetic wave is given by:
$\vec B=2×10^{−8}sin⁡(0.5×10^3x+1.5×10^{11}t)\hat jT$.
The amplitude of the electric field would be

A block of mass 200 g is kept stationary on a smooth inclined plane by applying a minimum horizontal force $F=\sqrt xN$ as shown in figure.

The value of x = ______.

A charge of 4 μC is to be divided into two. The distance between the two divided charges is constant. The magnitude of the divided charges so that the force between them is maximum, will be:

A transformer operating at primary voltage 8 kV and secondary voltage 160 V serves a load of 80 kW. Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be

The refracting angle of prism is A and refractive index of material of prism is $\cot \frac{A}{2}$ The angle of minimum deviation is

Two coherent sources of light interfere. The intensity ratio of two sources is 1 : 4. For this interference pattern if the value of
$\frac{I_{max}+I_{min}}{I_{max}-I_{min}}$is equal to $\frac{2α+1}{β+3},$
then α/β will be

A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire Y of length 5 m. The wire Y carries a current of 3 A. The distance between two wires is 5 cm and currents flow in the same direction. The force acting on the wire Y is

A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire Y of length 5 m

The refracting angle of prism is A and refractive index of material of prism is $\cot \frac{A}{2}$ The angle of minimum deviation is

Water falls from a 40 m high dam at the rate of $9 \times 10^4$ kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydroelectric energy number of 100 W lamps, that can be lit, is: (Take g=10ms^-2)

A steel wire of length 3.2 m (Y_s = 2.0 × 10¹¹ Nm^-2) and a copper wire of length 4.4 m (Y_c = 1.1 × 10¹¹ Nm^-2), both of radius 1.4 mm are connected end to end. When stretched by a load, the net elongation is found to be 1.4 mm. The load applied, in Newton, will be:
$(Given: π = \frac{22}{7})$

A square aluminium (shear modulus is 25 × 10⁹ Nm^–2) slab of side 60 cm and thickness 15 cm is subjected to a shearing force (on its narrow face) of 18.0 × 10⁴ N. The lower edge is riveted to the floor. The displacement of the upper edge is ______μm.

A 1 m long copper wire carries a current of 1 A. If the cross section of the wire is 2.0 mm² and the resistivity of copper is 1.7 × 10^–8 Ω, the force experienced by moving electron in the wire is ___ × 10^–23N.
(Charge on electron = 1.6 × 10^–19C)

The logic performed by the circuit shown in the figure is equivalent to:

the logic operation performed by the given circuit

A compass needle of oscillation magnetometer oscillates 20 times per minute at a place P of dip 30°. The number of oscillations per minute become 10 at another place Q of 60° dip. The ratio of the total magnetic field at the two places (B_Q: B_P) is