NCST Mock Test Season I Physics
NCST Mock Test I Physics
1] A ray of light incident on liquid air interface from liquid side. If angle of incidence is 60° and refractive index of liquid is √3 then, total deviation in ray will be
A. 120°B. 30°
C. 60°
D. None of these
2] Which mirror can form virtual image of real object?
A. Plain mirror onlyB. Concave mirror only
C. Convex mirror only
D. All of the above
3] Speed of light in a liquid is 1.5 × 108 m/s. Then, Refractive Index of air with respect to given liquid is:
(Speed of light in air = 3 × 108 m/s).
B. 1/2
C. 1
D. 3/2
4] An object is moving towards plane mirror with velocity 2 m/s, if mirror is also moving with velocity 1 m/s towards object then velocity of image with respect to ground is
A. 2 m/sB. 3 m/s
C. 4 m/s
D. 5 m/s
5] An object of height 1 mm is kept 60 cm away from a concave lens of focal length 40 cm. Then, height of image will be
A. 0.4 mmB. 2.4 mm
C. 0.5 mm
D. 0.6 mm
6] In the circuit shown calculate the reading of the ammeter.
A. 1 A
B. 0.5 A
C. 1.5 A
D. 2 A
7] In the circuit shown, calculate the value of the current I.
A. 5 A, away from junction point
B. 3 A, away from junction point
C. 5 A, toward junction point
D. 3 A, toward junction point
8] What is the equivalent resistance between A and B? (Each Resistor has resistance R).
A. 4R/3
B. 5R/3
C. 4R/5
D. 3R/4
9] A helium ion and a hydrogen ion are accelerated from rest through a potential difference of V to velocities of VHe and VH ,respectively. Then, what will be the ratio of VHe to VH?
A. 1/4B. 1/√2
C. √2
D. 2
10] Calculate the magnetic field induction 'B' at the centre of circular coil having 500 turns, radius π cm and carrying 10 A of current.
A. 0.1 TB. 0.005 T
C. 0.5 T
D. 0.05 T
11] An electron moving with constant velocity give
A. Magnetic field onlyB. Electric field only
C. Both electric field and magnetic field
D. Neither electric field nor magnetic field<
12] Two parallel wires carries current of 10 Ampere in same direction and the separation between them is 2 metre. Then, the force per unit length is
A. 10-7 N/mB. 10-5 N/m
C. 10-6 N/m
D. 10-4 N/m
13] A straight long horizontal wire carries current from east to west. An electron is moving below the wire from west to east, then the electron will experience
A. AttractionB. Repulsion
C. Both (i) and (ii)
D. None of these
14] The masses of the 3 wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio of 5:3:1. Then, the ratio of their electrical resistance is
A. 1:3:5B. 5:3:1
C. 1:15:125
D. 125:15:1
15] A ray of light is making an angle of 15° with plane mirror. Then, deviation produced in ray is
A. 50°B. 130°
C. 150°
D. 30°
16] Two plane mirrors are at an angle of 36° with each other. Then, total number of different images formed by mirrors will be
A. 10B. 9
C. 8
D. 11
17] If a concave lens of focal length 25 cm and convex lens of focal length 50 cm are in contact, then, power of their combination is
A. 6 DB. -6 D
C. 2 D
D. -2 D
18] Two heaters of power rating (100 W and 200 V) and (50 W and 200 V) are connected across 300 V battery in series. Then, the total power consumed by them is
A. 150 WB. 400 W
C. 50 W
D. 75 W
19] A wire of resistance 15 Ω is stretched to such a length that its radius became half. Then, its new resistance is
A. 140 ΩB. 240 Ω
C. 60 Ω
D. 120 Ω
20] A convex lens A of focal length 50 cm and a concave lens B of focal length 10 cm are kept along the same axis with a distance 'd' between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the value of 'd' is
A. 10 cmB. 40 cm
C. 20 cm
D. 0 cm
21] A vertical wire carries a current in upward direction. A proton beam sent horizontally towards the wire will be deflected ____.
A. towards rightB. towards left
C. upwards
D. downwards
22] A spherical mirror and a thin spherical lens have power 2 D. The mirror and lens are likely to be
A. Both ConcaveB. Both Convex
C. The mirror is Concave and the lens is Convex
D. The mirror is Convex and the lens is Concave
23] The resistance of each side of a regular hexagon ABCDEF is 10 Ω. The points B and F are connected by a wire of resistance 10 Ω. The resistance between points A and D is
A. 15 ΩB. 14 Ω
C. 7 Ω
D. None of these
24] Two resistances of value 12 Ω and 36 Ω are connected in parallel. This combination is connected in series to a resistance of 16 Ω and a cell of resistance 1 Ω. If the power developed in 16 Ω resistance is 100 W, then the e.m.f of the cell is
A. 35 VB. 55 V
C. 65 V
D. None of these
25] A uniform wire is bent in form of a square. If the effective resistance across one of the side of the square is 9 Ω, then, the resistance of the original wire is
A. 36 ΩB. 24 Ω
C. 48 Ω
D. 27 Ω
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