Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Mock Test Electric Charges and Fields AMBIPi. This CUET Physics Mock Test is of the Physics chapter Electric Charges and Fields. Before solving these CUET Physics questions, you must read CUET Physics Notes, which helps you to revise CUET Physics Syllabus and then you must need to solve CUET Previous Years Questions Papers.
CUET Physics Mock Test
CUET Physics Question No: 1
When the distance between the charged particles is halved, the force between them becomes.
Option A : One-fourth
Option B : Half
Option C : Double
Option D : Four times
Show/Hide Answer Key
Option D: Four times
Since f ∝ 1/d2, when r is halved the force becomes four times.
CUET Exam Physics Question No: 2
A charge q1 exerts some force on a second charge q2 . If third charge q3 is brought near, the force of q1 exerted on q2.
Option A : Decreases
Option B : Increases
Option C : Remains unchanged
Option D : Increases if q3 is of the same signs as q1 and decreases if q3 is of opposite sign.
Show/Hide Answer Key
Option C: Four times Remains unchanged
The force will still remain unchanged.
CUET UG Physics Question No: 3
The minimum charge on an object is
Option A : 1 coulomb
Option B : 1 stat coulomb
Option C : 1.6 × 10–19 coulomb
Option D : 3.2 × 10–19 coulomb
Show/Hide Answer Key
Option C: 1.6 × 10–19 coulomb
All other charges are its integral multiple. Minimum charge on an object = 1.6 × 10–19 coulomb.
CUET Domain Subject Physics Question No: 4
Three charges 4q, Q and q are in a straight line in the position of 0, 1/2 and 1 respectively. The resultant force on q will be zero, if Q =
Option A : -q
Option B : -2q
Option C : -q/2
Option D : 4q
Show/Hide Answer Key
Option A: -q
The force between 4q and q.
The force between Q and q
CUET BSc Physics Question No: 5
The number of electrons in 1.6 C charge will be
Option A : 1019
Option B : 1020
Option C : 1.1 × 1019
Option D : 1.1 × 102
Show/Hide Answer Key
Option A: 1019
CUET Entrance Exam Physics Question No: 6
The electric charge in uniform motion produces
Option A : An electric field only
Option B : A magnetic field only
Option C : Both electric and magnetic field
Option D : Neither electric nor magnetic field
Show/Hide Answer Key
Option C: Both electric and magnetic field
A movable charge produces electric field and magnetic field both
CUET Exam Question No: 7
Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are EA and EB respectively and if the displacement between A and B is r, then
Option A : EA > EB
Option B : EA < EB
Option C : EA = EB / r
Option D : EA = EB / r2
Show/Hide Answer Key
Option A: EA > EB
In non-uniform electric field. Intensity is more, where the lines are more denser.
CUET Physics Practice Questions No: 8
The electric field near a conducting surface having a uniform surface charge density is given by
Option A : σ/εo and is parallel to the surface
Option B : 2σ/εo and is parallel to the surface
Option C : σ/εo and is normal to the surface
Option D : 2σ/εo and is normal to the surface
Show/Hide Answer Key
Option C: σ/εo and is normal to the surface
Electric field near the conductor surface is given by σ/εo and it is perpendicular to surface.
CUET Physics Sample Paper Question No: 9
Deutron and -particle are put 1 Å apart in air. Magnitude of intensity of electric field due to deutron at -particle is
Option A : zero
Option B : 2.88 × 1011 N/C
Option C : 1.44 × 1011 N/C
Option D : 5.76 × 1011 N/C
Show/Hide Answer Key
Option C: 1.44 × 1011 N/C
Due to deutron, intensity of electric field at 1 Å distance.
CUET Physics Mock Test Question No: 10
An electric dipole when placed in a uniform electric field E will have minimum potential energy, if the positive direction of dipole moment makes the following angle with E
Option A : π
Option B : π/2
Option C : Zero
Option D : 3π/2
Show/Hide Answer Key
Option C: Zero
Potential energy = –pE cosθ
When θ = 0
Potential energy = –pE (minmum)
CUET Physics Question No: 11
The electric potential at a point on the axis of an electric dipole depends on the distance r of the point from the dipole as
Option A : ∝ 1/ r
Option B : ∝ 1/ r2
Option C : ∝ r
Option D : ∝ 1/ r3
Show/Hide Answer Key
Option B: ∝ 1/ r2
Electric potential due to dipole in it’s general position is given by
CUET Exam Physics Question No: 12
An electric dipole is kept in non-uniform electric field. It experiences
Option A : A force and a torque
Option B : A force but not a torque
Option C : A torque but not a force
Option D : Neither a force nor a torque
Show/Hide Answer Key
Option A: A force and a torque
As the dipole will feel two forces which are although opposite but not equal.
Thus, A net force will be there and as these forces act at different points of a body. A torque is also parent.
CUET UG Physics Question No: 13
The distance between the two charges +q and –q of a dipole is r. On the axial line at a distance d from the centre of dipole, the intensity is proportional to
Option A : q/d2
Option B : qr/d2
Option C : q/d3
Option D : qr/d3
Show/Hide Answer Key
Option D: qr/d3
Field along the axis of the dipole
CUET Domain Subject Physics Question No: 14
The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of 90° about its perpendicular axis, the electric field at the same point will be
Option A : E
Option B : E / 4
Option C : E / 2
Option D : 2E
Show/Hide Answer Key
Option C: E/2
When the dipole is rotated through at an angle of 90° about it’s perpendicular axis then given point comes out to be on equator. So field will become E / 2 at the given point.
CUET BSc Physics Question No: 15
An electric dipole of moment ρ placed in a uniform electric field E has minimum potential energy when the angle between ρ and E is
Option A : Zero
Option B : π/2
Option C : π
Option D : 3π/2
Show/Hide Answer Key
Option A: Zero
U = –PE cos θ. It has minimum value when θ= 0°. i.e. Umin = –PE cos0° = –PE
CUET Entrance Exam Physics Question No: 16
A Cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The total flux for the surface of the cylinder is given by
Option A : 2πR2E
Option B : πR2 / E
Option C : (πR2/ πR) / E
Option D : Zero
Show/Hide Answer Key
Option C: Both electric and magnetic field
Flux through surface A ΦA = E × πR2 and ΦB = E × πR2.
Flux through curved surface
Total flux through cylinder = ΦA + ΦB + ΦC = 0
CUET Exam Question No: 17
An electric charge q is placed at the centre of a cube of side a. The electric flux on one of its faces will be
Option A : q / 6εo
Option B : q / εoa2
Option C : q / 4πεoa2
Option D : q / εo
Show/Hide Answer Key
Option A: q / 6εo
By Gauss’s theorem, Electric flux φ = q / 6εo
CUET Physics Practice Questions No: 18
For a given surface the Gauss’s law is stated as ∮E.ds = 0. From this we can conclude that
Option A : E is necessarily zero on the surface
Option B : E is perpendicular to the surface at every point
Option C : The total flux through the surface is zero
Option D : The flux is only going out of the surface
Show/Hide Answer Key
Option C: The total flux through the surface is zero
The total flux through the surface is zero.
CUET Physics Sample Paper Question No: 19
Total electric flux coming out of a unit positive charge put in air is
Option A : εo
Option B : εo-1
Option C : (4ρεo)-1
Option D : 4πεo
Show/Hide Answer Key
Option B: εo-1
Total flux coming out from unit charge
CUET Physics Mock Test Question No: 20
A cube of side l is placed in a uniform field E, where E = Eiˆ. The net electric flux through the cube is
Option A : Zero
Option B : l2E
Option C : 4l2E
Option D : 6l2E
Show/Hide Answer Key
Option A: Zero
As there is no charge residing inside the cube, hence net flux is zero.
CUET Physics Question No: 21
A charge q is placed at the centre of the open end of cylindrical vessel. The flux of the electric field through the surface of the vessel is
Option A : Zero
Option B : q/εo
Option C : q/2εo
Option D : 2q/εo
Show/Hide Answer Key
Option D: Four times
To apply Gauss’s theorem it is essential that charge should be placed inside a closed surface. So, imagine another similar cylindrical vessel above it as shown in figure (dotted).
Required flux φ = q/2εo
CUET Exam Physics Question No: 22
According to Gauss’s Theorem, electric field of an infinitely long straight wire is proportional to
Option A : r
Option B : 1/r
Option C : 1/r3
Option D : 1/r
Show/Hide Answer Key
Option D: 1/r
CUET UG Physics Question No: 23
The S.I. unit of electric flux is
Option A : Weber
Option B : Newton per coulomb
Option C : Volt × meter
Option D : Joule per coulomb
Show/Hide Answer Key
Option C: Volt × meter
S.I. unit of electric flux is
CUET Domain Subject Physics Question No: 24
Gauss’s law is true only if force due to a charge varies as
Option A : r-1
Option B : r-2
Option C : r-3
Option D : r-4
Show/Hide Answer Key
Option B: r-2
Gauss’s law is true only if force due to a charge varies as r–2.
CUET BSc Physics Question No: 25
An electric dipole is put in north-south direction in a sphere filled with water. Which statement is correct
Option A : Electric flux is coming towards sphere
Option B : Electric flux is coming out of sphere
Option C : Electric flux entering into sphere and leaving the sphere are same
Option D : Water does not permit electric flux to enter into sphere.
Show/Hide Answer Key
Option C: Electric flux entering into sphere and leaving the sphere are same
In electric dipole the flux coming out from positive charge is equal to the flux coming in at negative charge i.e. total charge on sphere = 0. From Gauss law, total flux passing through the sphere = 0.
