List of top Questions asked in NEET (UG)

An infinitely long straight conductor carries a current of 5 A as shown. An electron is moving with a speed of 10⁵ m/s parallel to the conductor. The perpendicular distance between the electron and the conductor is 20 cm at an instant. Calculate the magnitude of the force experienced by the electron at that instant

The Adenosine deaminase deficiency results into

Which of these is not an important component of initiation of parturition in humans

Following are the statements about prostomium of earthworm.
(a) It serves as a covering for mouth.
(b) It helps to open cracks in the soil into which it can crawl.
(c) It is one of the sensory structures.
(d) It is the first body segment.
Choose the correct answer from the options given below

The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be

The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them

Consider the following statements (A) and (B) and identify the correct answer. 
(A) A zener diode is connected in reverse bias when used as a voltage regulator. 
(B) The potential barrier of the p-n junction lies between 0.1 V to 0.3 V.

Column - I gives certain physical terms associated with the flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations 

Two charged spherical conductors of radius R₁ and R₂ are connected by a wire. Then the ratio of surface charge densities of the spheres (σ₁ /σ₂ ) is

Which one of the following statements about Histones is wrong

A small block slides down on a smooth inclined plane, starting from rest at time t=0. Let Sn be the distance traveled by the block in the interval t=n−1 to t=n. Then, the ratio \(\frac{S_n}{S_{(n+1)}}\)

A radioactive nucleus \(_{Z}^{A}\textrm{X}\) undergoes spontaneous decay in the sequence \(_{Z}^{A}\textrm{X}\)\(\rightarrow\)_Z-1B\(\rightarrow\)_Z-3C\(\rightarrow\)_Z-2D, where Z is the atomic number of element X. The possible decay particles in the sequence are

A body is executing simple harmonic motion with frequency ‘n’, the frequency of its potential energy is

For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y?

Match List - I with List - II.

List - I List - II Choose the correct answer from the options given below

A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at the 40 cm mark. A mass of 2 kg is suspended from the rod at 20 cm and another unknown mass ‘m’ is suspended from the rod at the 160 cm mark as shown in the figure. Find the value of ‘m’ such that the rod is in equilibrium. (g=10 m/s²)

Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop

A particle of mass ‘m’ is projected with a velocity v=kV_e(k < 1) from the surface of the earth. (V_e=escape velocity) The maximum height above the surface reached by the particle is

A car starts from rest and accelerates at 5 m/s² . At t=4 s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t=6 s? (Take g=10 m/s²)

A series LCR circuit containing a 5.0 H inductor, 80 µF capacitor and 40 Ω resistor is connected to a 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be

Match List - I with List - II

List - I List - II Choose the correct answer from the options given below.

Following are the statements with reference to ‘lipids’. 
(a) Lipids having only single bonds are called unsaturated fatty acids.
(b) Lecithin is a phospholipid. 
(c) Trihydroxy propane is glycerol.
(d) Palmitic acid has 20 carbon atoms including carboxyl carbon. 
(e) Arachidonic acid has 16 carbon atoms. 
Choose the correct answer from the options given below.

Which of the following secretes the hormone, relaxin, during the later phase of pregnancy