List of top Physics Questions asked in NEET (UG)

The half-life of a radioactive isotope is 3 h. If the initial mass of the isotope was 300 g, the mass which remained undecayed after 18 h would be
The potentiometer is best for measuring voltage,as:
Which species does not exhibits paramagnetism:
Two masses as shown in the figure are suspended from a massless pulley. The acceleration of the system when masses are left free is
A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be
Calculate the net resistance of the circuit between A and B :
Gravitational force is required for
A body of weight 72 N moves from the surface of earth at a height half of the radius of earth, then gravitational force exerted on it will be
For the adjoining diagram, a triangular lamina is shown the correct relation between \(I_1\), \(I_2\) & \(I_3\) is:
(\(I\) – moment of inertia)
triangular lamina
Electric field at centre O of semicircle of radius a having linear charge density $\lambda$ given as
A car battery of emf 12V and internal resistance 5×10–2Ω,receives a current of 60Å from external source,then terminal voltage of battery is:
If \(\vec F\)=(60\(\hat i\)+15\(\hat j\)-3\( \hat k\))N and \(\vec V\)=(2\(\hat i\)-4\(\hat j\)+5\( \hat k\))m/s, then instantaneous power is:
For the given reaction, the particle \(\text {X}\) is:
\(_6C^{11}→\ _5B^{11}+β^++X\)

For a plane convex lens \((µ = 1.5)\) has radius of curvature 10 cm. It is silvered on its plane surface. Find focal length after silvering:

From the following diode circuit. Which diode in forward biased condition:
The relation between  \(λ\) and \(T_\frac 12\)is: 
\((T_\frac 12 = half\  life, \ λ→decay\  constant)\)
Two spherical bob of masses \(M_A\) and \(M_B\) are hung vertically from two strings of length \(l_A\) and \(l_B\) respectively. They are executing SHM with frequency relation  \(f_A=2f_B\), Then:
Given truth table is correct for:
ABY
111
100
010
000
A string is cut into three parts, having fundamental frequencies n1, n2, and n3 respectively. Then original fundamental frequency ‘n’ related by the expression as:

A charge having \(q/m\) equal to \(10^8 \ c/kg\) and with velocity \(3×10^5 \ m/s \) enters into a uniform magnetic field \(B=0.3 \ tesla\) at an angle \(30º\) with direction of field. Then radius of curvature will be:

Nuclear–Fission is best explained by:

The equations of two waves given as \(x=acos\ (ωt + δ)\) and \(y=a cos\ (ωt+α)\), Where \(δ=α+\frac \pi 2\), then resultant wave represent:

Two stationary sources each emitting waves of wave length \(λ\). An observer moves from one source to other with velocity \(u\). Then number of beats heard by him:

The width of river is 1 km. The velocity of boat is 5 km/hr. The boat covered the width of river with shortest will possible path in 15 min. Then the velocity of river stream is:

Two projectiles of same mass and with same velocity are thrown at an angle \(60º\) & \(30º\) with the horizontal, then which quantity will remain same: