NEET Physics Chapter Wise Mock Test – Mock Test 3
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is
(a) 3 V/m
(b) 6 V/m
The value of resistance is 10.85452 Q and the value of current is 3.23 A. The potential difference is 35.02935 V. Its value in significant number would be
(a) 3.8 V
(b) 35.0 V
(c) 35.03 V
(d) 35.029 V
A body initially at rest is accelerate at the rate of 2 ms-2 for 5s. If the body continues with uniform velocity for next 10 s, the total distance covered by the body is
(a) 50 m
(c) 165 m
(d) 225 m
Velocity-time graph of motion of a body is shown below
(a) at B, force is zero
(b) at B, there is a force but towards motion
(c) at 6, there is a force which opposes the motion
(d) None of the above
A metal disc of radius r floats on the surface of water. The water layer goes down and makes an angle 0 with the vertical edge of the disc. If it displaces a weight w of water and the surface tension of water is T, then weight of the disc is
If at the same temperature and pressure, the densities of two diatomic gases are and d2, respectively. The ratio of mean kinetic-energy per molecule of gases will be
If the refractive index of water is 4/3 and that of given slab of glass immersed in it is 5/3, what is the critical angle for a ray of light tending to go from glass to water?
Two polaroids are crossed. If now one of them is rotated through 30° and unpolarised light of intensity l0 is incident on the first Polaroid, then the intensity of transmitted light will be
In Young’s experiment, light of wavelength 4000 A is used to produce bright fringes of width 0.6 mm, at a distance of 2 m. If the whole apparatus is dipped in a liquid of refractive index 1.5, then the fringe width will be
(a) 0.2 mm
(b) 0.3 mm
(c) 0.4 mm
(d) 1.2 mm
White light is used to illuminate the two slits in a Young’s double slit experiment. The separation between slits is b and the screen is at a distance d(>>b) from the slits. At a point on the screen directly infront of one of the slits, certain wavelengths are missing. One of the missing wavelengths is (a) X = b2ld
A charge q is distributed over two concentric hollow conducting sphere of radii r and R (> r), such that their surface charge densities are equal. The potential at their common centre is
When resonance is produced in a series L-C-R circuit, then which of the following is not correct?
(a) Current in the circuit is in phase with the applied voltage
(b) Inductive and capacitive reactances are equal
(c) If R is reduced, the voltage across capacitor will increase
(d) Impedance of the circuit is maximum
In a meter bridge with a standard resistance of 5 Ω in the left gap, the ratio of balancing lengths on the meter bridge wire is 2 : 3. The unknown resistance is
(a) 2 H
(b) 5 H
(c) 10 H
(d) 20 H
An ideal choke of 10 H is joined in series with resistance of 5 Ω and a battery of 5V. The current in the circuit in 2 s after joining in ampere, will be
A series L-R circuit is connected to an AC source of frequency oo and the inductive reactance is equal to 2R. A capacitance of capacitive reactance equal to R is added in series with L and R. The ratio of the new power factor to the old one is
The total binding energy of a nucleus is defined as the product of mass defect (in kg) and a constant. The value of constant
A radioactive element X with a half-life of 2 h decays giving a stable element Y. After a time of t hours, the ratio of Xto Yatoms is 1:7. Then, is
(c) in between 4 and 6
Generally, semiconductor can be used safely between the temperatures
(a) – 75°C and 200°C
(b) 0°C and 75°C
(c) – 25°C and 300°C
(d) – 40°C and 1000°C
Assuming that the silicon diode (having negligible resistance), the current through the diode is (knee voltage of silicon diode is 0.7 V)
(b) 7 mA
(c) 2.3 mA
(d) 23 mA
A ray falls on a prism ABC (AB = BC) and travels as shown in figure. The minimum refractive index of the prism material should be
In an experiment on photoelectric effect, a student plots stopping potential V0 against reciprocal of the wavelength X of the incident light for two different metals A and B. These are shown in the figure.
Looking at the graphs, you can most appropriately say that .
(a) Work function of metal 6 is greater than that of metal A
(b) Work function of metal A is greater than that of metal B
(c) Data is not sufficient
(d) None of the above
A gas undergoes a cyclic process ABCDA as shown in figure. The part ABC of process is semi-circular. The work done by the gas is
In a given process on an ideal gas, dW = 0 and dQ < 0, then for the gas
(a) the temperature will decrease
(b) the volume will increase
(c) the pressure will remain constant
(d) the temperature will increase
A cell of emf £ and internal resistance r is connected with external resistance R. The graph between terminal voltage and current is
The output of a two input OR gate is 1, if
(a) both inputs are zero
(b) either or both inputs are 1
(c) only both inputs are 1
(d) either input is zero
(A x B) . (A x B) is equal to
Direction (Q Nos. 41-45) In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
(b) If both Assertion and Reason are true but the Reason is not correct explanation of the Assertion
(c) If Assertion is true but Reason is false
(d) If both Assertion and Reason are false
Assertion (A) Angle between i + j and i is 45°.
Reason (R) i + j is equally include to both i and j and the angle between i and j is 90°.
Assertion (A) Velocity-time graph for an object in a uniform motion along a straight line is, parallel to the time axis.
Reason (R) In uniform motion of an object, velocity increases as the square of time elapsed.
Assertion (A) Inertia and moment of inertia are same quantities.
Reason (R) Moment of inertia represents the capacity of a body to oppose its state of motion.
Assertion (A) To obtain same change in the value of g, depth d below the surface of earth must be equal to twice the height h above the surface of the earth.
Reason (R) g changes less with depth than with height.
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