NEET Physics Chapter Wise Mock Test – Mock Test 1
The method of dimensional analysis can be used to derive, which of the following relations?
The angle between A = i + j and B = i – j is
A body starts from rest and moves with constant acceleration. The ratio of distance covered by the body in nth second to that covered in n second, is
A passenger in a train drops a ball from the window of a train running at an acceleration a. A pedestrian on the ground by the side of the rails observes the ball falling along
Two blocks of masses 3 kg and 2 kg are placed side by side on an incline as shown in the figure.
A force F = 20N is acting on 2 kg block along the incline.
The coefficient of friction between the block and the incline in same and equal to 0.1. Find the normal contact force exerted by 2 kg block on 3 kg block.
(a) 18 N
(b) 30 N
(d) 27.6 N
Figure shows the orientations of two vectors u and v in the XYplane. If u = ai + bj and v = pi + q j Which of the following is correct?
(a)a and p are positive while b and q are negative
(b)a, p and b are positive while q is negative
(c)a, q and b are positive while p is negative
(d)a, b, p and q are all positive
A body is projected from A at an angle of 90° with the plane AB. It again touches the plane at B after time 7. Then, what is the length AB?
A rigid body rotates about a fixed axis with variable angular velocity equal to a – pt at time f, where a and P are constants. Find the angle through which it rotates before it comes to stop.
Satellites orbiting the earth have finite life and sometimes debris of satellites fall to the earth. This is because
(a)the solar cells and batteries in satellites out
(b)the laws of gravitation predict a trajectory spiralling inwards
(c)of various forces causing the speed of satellite and hence height to gradually decrease
(d)of collisions with other satellites
A particle performs simple harmonic motion with amplitude A and period T. The mean velocity of the particle over the time interval during which it travels a distance of A/2 starting from extreme position is
The total kinetic energy of all the molecules of helium having a volume V exerting a pressure p is 1500 J. The total KE in joule of all the molecules of N2 having the same volume V and exerting a pressure 2 p, is
500 g of water and 100g of ice at 0°C are in a calorimeter whose water equivalent is 40 g. 10g of steam at 100°C is added to it. Then, water in the calorimeter is
(Latent heat of ice = 80 cal/g, Latent heat of steam = 540 cal/g)
(a) 578 g
(b) 590 g
(c) 600 g
(d) 610 g
A metal ball of surface area 200 cm2 and at temperature 527°C, is surrounded by a vessel at 27°C. If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is approximately
A point source emits sound equally in all directions, in a non-absorbing medium. Two points Pand Q are at a distance of 9 m and 25 m, respectively from the source. The ratio of the amplitude of the waves at P and Q is
(a) 3/5 (b)5/3 (c) 9/25 (d)25/9
If the critical angle for the medium of a prism is C and the angle of prism is A, then there will be no emergent ray, when
Two points separated by a distance of 0.1 mm can just be inspected in a microscope, when a light of wavelength 6000 A is used. If light of wavelength 4800 A is used, this limit of resolution will become
(a) 0.8 mm
(b) 0.12 mm
(c) 0.10 mm
(d) 0.08 mm
In the shown circuit the reading of ammeter is same when both the switches are open, and when both the switches are closed. Assume the ammeter to be ideal, the value of Ft satisfying above condition is
The power and voltage rating of a heater is 1000 W and 100 V, respectively. What should be the value of R in the given circuit, so that heater operates with power of 62.5 W?
It takes 16 min to boil some water in an electric kettle. Due to some defect, it becomes necessary to remove 10% turns of the heating coil of the kettle. After repairs, how much time will it take to boil the same mass of water?
(a) 17.7 min
(b) 14.4 min
(c) 20.9 min
(d) 13.7 min
A long wire carries a current of 20 A along the axis of solenoid. The field due to the solenoid is 4 mT. The resultant field at a point 3 mm from the solenoid axis inside solenoid is
(a) 1.33 mT
(b) 4.2 mT
(c) 5.33 mT
(d) 2.87 mT
A mass of 50g of water in a closed vessel, with surroundings at a constant temperature takes 2 min to cool from 30°C to 25°C. A mass of 100g of another liquid in an identical vessel with identical surroundings takes the same time to cool from 30°C to 25°C. The specific heat of the liquid is (The water equivalent of the vessel is 30 g)
(a) 2.0 kcal/kg
(b) 4 kcal/kg
(c) 3 kcal/kg
(d) 0.5 kcal/kg
A 50 Hz, AC current of crest value 2 A flows through the primary of a transformer. If the mutual inductance between the primary and secondary is 0.25 H, the crest voltage induced in the secondary is
(a) 50 V
(b) 100 V
(c) 200 V
(d) 300 V
In an L-R circuit, the AC source has voltage 220 V. The potential difference across the inductance is 176 V. The potential difference across the resistance will be
Select the correct statement from the following.
(a) Electromagnetic waves cannot travel in vacuum
(b) Electromagnetic waves are longitudinal waves
(c) Electromagnetic waves are produced by charges moving with uniform velocity
(d) Electromagnetic waves carry both energy and momentum as they propagate through space
In the network shown,
(a) the potential difference across D2 is 5 V
(b) current through resistor equals 1.25 A
(c) current through diode D, and resistance is 1.25 A
(d) current through diode Dz and resistance is 1.25 A
It is found that|A + B| = |A|.This necessarily implies
Two rings of the same radius and mass are placed, such that their centres are at a common point and their planes are perpendicular to each other. The moment of inertia of the system about an axis passing through the centre and perpendicular to the plane of one of the rings is
(mass of ring = m and radius = r)
The ratio of the kinetic energy required to be given to the satellite to escape the earth’s gravitational field to the kinetic energy required to be given, so that the satellite moves in circular orbit just above earth’s atmosphere, is
The frequency of a note emitted by a source changes by 20% as it approaches an observer. As it recedes away from him, the apparent.frequency will differ from the actual frequency by
A spherical droplet having a potential of 2.5 V is obtained as a result of merging of 125 identical droplets, Find the potential of constituent droplet.
(a) 0.4 V
(b) 0.5 V
(c) 0.2 V
A piece of wire is cut into four equal parts and the pieces are bundled together side by side to form a thick wire. Compared with that of the original wire, the resistance of the bundle is
(a) the same
A system of four gates is set up as shown. The ‘truth table’ corresponding to this system is
Two magnets, the magnetic moment of one being twice that of other, oscillate in a magnetic field first with like poles tied together and then with unlike poles tied together. The ratio of the time periods in the two cases, is