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Select Lessons (39)
Dynamics: Newton’s Laws of Motion
ELECTRICITY: Current
ELECTRICITY: Current
ELECTRICITY: Resistance
Elasticity
Electric fields
Electromagnetism
Electromagnetism
Energy: Application And Uses
Experimental physics
Forces
Gravitational fields
Heat
Kinematics in Two Dimensions: Vectors, projectiles
Kinematics in one dimension
Linear Momentum
MOTION
MOTION
MOTION
MOTION
MOTION
MOTION: Circular
MOTION: Collision
MOTION: Inclined plane
MOTION: Simple harmonic motion (SHM)
Magnetism
Optics
PLASTICS
PRESSURE
Radioactivity
TEMPERATURE
The Laws of Thermodynamics
Units System
Units System
Units, dimensions and homogeneity
WAVES: Electromagnetic
WAVES: Electromagnetic
WAVES: Sound
5/30 MCQs for:
Magnetism
The force on a current-carrying wire in a magnetic field is the strongest when:
The current is parallel to the field lines.
The current is at a 30e angle with respect to the field lines.
The current is at a 60e angle with respect to the field lines.
The current is perpendicular to the field lines.
At double the distance from a long current-carrying wire, the strength of the magnetic field produced by that wire decreases to:
1/2 of its original value.
None is correct.
1/4 of its original value.
1/8 of its original value.
The magnetic field produced by a long straight current-carrying wire is:
Proportional to the current in the wire and inversely proportional to the distance from the wire.
Inversely proportional to the current in the wire and proportional to the distance from the wire.
Inversely proportional to both the current in the wire and the distance from the wire.
Proportional to both the current in the wire and the distance from the wire.
A charged particle moves with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves:
Straight upward.
Upward at an angle of 45e above the horizontal.
In a plane parallel to the Earth's surface.
Straight downward.
1 T is equivalent to:
1 Nm/A.
1 NA/m.
Vm/A.
N/Am.
