[PDF] Coast Guard Science Questions and Practice Set for Navik GD Exam

[PDF] Coast Guard Science Questions and Practice Set for Navik GD Exam | Science Section of ICG

Science Section of Indian Coast Guard GD Practice Paper and Sample Paper pdf, Science for GD Exam

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Sample Questions of Science Section for Coast Guard Exam

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Photoelectrons are being obtained by irradiating zinc by a radiation of 3100 Å. In order to increase the kinetic energy of ejected photoelectrons.
I.   The intensity of radiation should be increased.
II.   The wave length of radiation should be increased.
III.   The wavelength of radiation should be decreased.
IV.   Both wavelength and intensity of radiation should be increased.
Correct Answers: III
Mirage is a phenomenon due to
I.   refraction of light
II.   reflection of light
III.   total internal reflection of light
IV.   Diffraction of light.
Correct Answers: III
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will
I.   Become zero
II.   Become infinite
III.   Become small, but non-zero
IV.   Remain unchanged
Correct Answer: II
The primary origin(s) of magnetism lies in
I.   Pauli Exclusion Principle.
II.   Polar nature of molecules.
III.   Intrinsic spin of electron.
IV.   None of these.
Correct Answer: B
Which of the following statements is not true about Gauss’s law
I.   Gauss’s law is true for any closed surface.
II.   The term q on the right side of Gauss’s law includes the sum of all charges enclosed by the surface.
III.   Gauss’s law is not much useful in calculating electrostatic field when the system has some symmetry.
IV.   Gauss’s law is based on the inverse square dependence on distance contained in coulomb’s law
Correct Answer: iii
A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the Centre is directed..
I.   Perpendicularly to the diameter
II.   Parallel to the diameter
III.   At an angle tilted towards the diameter
IV.   At an angle tilted away from the diameter
Correct Answer: i
The quantization of charge implies
I.   charge can't be destroyed
II.   charge exists on particles
III.   there is a minimum permissible charge on a particle
IV.   charge, which is a fraction of coulomb on a particle

Correct Answer: IV
The unit of electric dipole moment is
I.   Newton
II.   Coulomb
III.   Farad
IV.   Debye
Correct Answer: IV
An electric dipole of moment 𝑝⃗ is placed in a uniform electric field 𝐸⃗ . Then
(a) The torque on the dipole is 𝑝⃗ ×E→
(b) The potential energy of the system is 𝑝⃗ .E→
(c) The resultant force on the dipole is zero. Choose the correct option.
I.   (a), (b) and (c) are correct
II.   (a) and (c) are correct and (b) is wrong
III.   only (i) is correct
IV.   (a) and (b) are correct and (c) is wrong
Correct option is II
Two spherical conductors each of capacity C are charged to potential V and -V. These are then connected by means of a fine wire. The loss of energy is
I.   zero
II.   ½ CV²
III.   CV²
IV.   2 CV²
Correct Answer iii
In a region, potential is represented by V(x,y,z)= 6x - 8xy - 8y + 6yz, where V is in volts and x,y,z are in meters. The electric force experienced by a charge of 2 coulomb situated at the point (1,1,1) is-
I.   6√5 N
II.   30 N
III.   24 N
IV.   4√35 N
Correct Answers: IV

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[PDF] Coast Guard Science Questions and Practice Set for Navik GD Exam | Science Section of ICG