Chapter 14, 2nd year physics: MCQs | Electrodynamics Past Paper: mcqs, (2023 NEW)

Описание: Chapter 14 2nd year physics past board exam complete mcqs are given in this video.
MCQs cover following topics
Magnetic Field Due to Current in a Long Straight Wire:
Magnetic Force on Current Carrying Conductor:
Magnetic Flux and Magnetic Flux Density:
Ampere’s Law and Determination of Flux Density B:
Force on a Moving Charge In a Magnetic Field:
Motion of Charged Particle in Electric and Magnetic Field:
Determination of e/m of Electron:
Galvanometer: (Ammeter and Voltmeter)
Torque on a Carrying Coil:
Cathode Ray Oscilloscope:
Avo Meter: (Multimeter)

Magnetic field lines due to long straight current carrying conductor are
Elliptical
Square
Circular
Rectangular




Magnetic field lines direction due to long straight current carrying conductor can be found by using
Right hand rule
Left hand rule
Fleming rule
None of the above




Magnetic field lines due to long straight current carrying will be counter clockwise if current is
Out of plane
Into plane
Zero
Changing direction with time





Two parallel straight wires carrying current in the same direction:
Attract each other
Repel each other
Neither attract nor repel
Sometimes attract sometimes repel



Two parallel straight wires carrying current in opposite direction
Attract each other
Repel each other
Neither attract nor repel
Sometimes attract sometimes repel

The SI unit of magnetic induction is
Tesla
Weber
〖NC〗^(-1)
None of the above

Magnetic flux density at a point due to current carrying coil is determined by
Ampere’s law
Gauss’s law
Faraday’s law
Newton’s law
If the number of turns become double but length remain same, then magnetic field in the solenoid become
Half
Remain same
Double
Four times



If 100 turns of wire are wound on 10cm length, then number of turns per unit length is
10
100
1000
None of the above
The magnetic field inside a long solenoid, when the current "I" passed through it will be
µ_0 nI
µ_0 NI
µ_0 NlI
Both a and c

Force on a moving charge in pure uniform magnetic field is given by:
F ⃗=qB ⃗×v ⃗
F ⃗=qv ⃗×B ⃗
F ⃗=qv ⃗+B ⃗
F ⃗=qE ⃗+qv ⃗×B ⃗
The magnetic force is simply a
Retarding force
Non conservative force
Deflecting force
Zero force


If a charge is at rest in a magnetic field then force on charges is
Maximum
Zero
Minimum but non zero
Constant but non zero
The charges moving perpendicular to magnetic field experience force
Maximum
Zero
Minimum but non zero
Constant but non zero
Force on a moving charge in uniform magnetic field will be maximum when the angle between v and B is
0^0
〖30〗^0
〖60〗^0
〖90〗^0
A magnetic force acts on a charged particle so as to change its
Speed
Direction
Kinetic Energy
Potential Energy
Magnetic force on a moving on charged particle is perpendicular to
Velocity only
Magnetic field only
Both a and b
None of the above
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