NEET TEST SERIES 100 PHYSICS
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1. The number of electric lines of force that radiate outwards from one coulomb of charge in vacuum is
a) 1.13 × 10
11
b) 1.13 × 10
10
c) 0.61 × 10
11
d) 0.61 × 10
9
Deselect Answer
a)
b)
c)
d)
None
2. A unit charge moves on an equipotential surface from a point A to point B, then
a) V
A
-V
B
= +ve
b) V
A
-V
B
= 0
c) V
A
-V
B
=-ve
d) it is stationary
Deselect Answer
a)
b)
c)
d)
None
3. In a hollow spherical shell, potential (V) changes with respect to distance (s) from centre as
A) (a)
B) (b)
C) (c)
D) (d)
Deselect Answer
a)
b)
c)
d)
None
4. Three capacitors are connected in the arms of a triangle ABC as shown in figure 5 V is applied between A and B. The voltage between B and C is
a) 2 V
b) 1 V
c) 3 V
d) 1.5 V
Deselect Answer
a)
b)
c)
d)
None
5. The voltage V and current I graphs for a conductor at two different temperatures T
1
and T
2
are shown in the figure. The relation between T
1
and T
2
is
a) T
1
> T
2
b) T
1
< T
2
c) T
1
= T
2
a) T
1
> 1/T
2
Deselect Answer
a)
b)
c)
d)
None
6. The Balmer series for the H-atom can be observed
a) if we measure the frequencies of light emitted when an excited atom falls to the ground state
b) if we measure the frequencies of light emitted due to transitions between excited states and the first excited state
c) in any transition in a H-atom
d) None of these
Deselect Answer
a)
b)
c)
d)
None
7. Currents flowing in each of the circuits A and B respectively are
a) 1 A, 2A
b) 2A, 1A
c) 4A, 2A
d) 2A, 4A
Deselect Answer
a)
b)
c)
d)
None
28. The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct output waveform.
Output is:
A) (a)
B) (b)
C) (c)
D) (d)
Deselect Answer
a)
b)
c)
d)
None
9. In the circuit below, A and B represent two inputs and C represents the output.
The circuit represents
a) NOR gate
b) AND gate
c) NAND gate
d) OR gate
Deselect Answer
a)
b)
c)
d)
None
10. As the quantum number increases, the difference of energy between consecutive energy levels
a) remain the same
b) increases
c) decreases
d) sometimes increases and sometimes decreases.
Deselect Answer
a)
b)
c)
d)
None
11. For a constant force the work done in stretching if spring constant k1>k2 then energy stored in two wire related as
a) ω1>ω2
b) ω1=ω2
c) ω1<ω2
d) ω2=2ω1
Deselect Answer
a)
b)
c)
d)
None
12. The displacement of an elastic wave is given by the function y=3sinωt+4cosωt. where y is in cm and t is in second. Calculate the resultant amplitude.
a) 3 cm
b) 4 cm
c) 5 cm
d) 7 cm
Deselect Answer
a)
b)
c)
d)
None
13. When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary.
a) the surface tension of the liquid must be zero
b) the contact angle must be 90∘
c) the surface tension may be zero
d) the contact angle may be 90∘
Deselect Answer
a)
b)
c)
d)
None
14. A load of 3kg produces an extension of 1.5mm in a wire of length 3m and diameter 2mm. Young’s modulus of the material of the wire is
a) 1.87×10
10
Nm
−2
b) 3.5×10
10
Nm
−2
c) 15×10
10
Nm
−2
d) 2.5×10
10
Nm
−2
Deselect Answer
a)
b)
c)
d)
None
15. Young’s double slit experiment is first performed in air and then in a medium other than air. It is found than 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly
a) 1.25
b) 1.59
c) 1.69
d) 1.78
Deselect Answer
a)
b)
c)
d)
None
16. Two similar thin Equi-convex lenses, of focal f each, are kept coaxially in contact with each other such that the focal length of the combination is F1, When the space between the two lens is filled with glycerine (which has the same refractive index μ=1.5 as that of glass) then the equivalent focal length is F2, the ratio F1:F2 will be
a) 3:2
b) 2:1
c) 1:2
d) 2:3
Deselect Answer
a)
b)
c)
d)
None
17. A 2.5 m long straight wire having mass of 500 g is suspended in mid-air by a uniform horizontal magnetic field B. If a current of 4 A is passing through the wire, then the magnitude of the field is (Take g 10ms−2)
a) 0.5T
b) 0.6T
c) 0.25T
d) 0.8T
Deselect Answer
a)
b)
c)
d)
None
18. A current-carrying infinitely long wire is kept along the diameter of a circular wire loop, without touching it. The correct statement(s) is (are)
a) The emf induced in the loop is zero if the current is constant.
b) The emf induced in the loop is finite if the current is constant.
c) The emf induced in the loop is zero if the current decreases at a steady rate.
d) The emf induction in the loop is finite if the current decreases at a steady rate.
Deselect Answer
a)
b)
c)
d)
None
19. At resonant frequency the current amplitude in series LCR circuit is
a) maximum
b) minimum
c) zero
d) infinity
Deselect Answer
a)
b)
c)
d)
None
20. A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is.
a) blue
b) green
c) violet
d) red
Deselect Answer
a)
b)
c)
d)
None
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