Magnetic Effects of Electric Current
Physics ⇒ Electricity and Magnetism
Magnetic Effects of Electric Current starts at 9 and continues till grade 12.
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See sample questions for grade 12
A beam of electrons is moving horizontally from west to east. If the magnetic field is vertically upwards, what is the direction of the force on the electrons?
A charged particle enters a magnetic field at an angle of 0° with respect to the field direction. What is the force acting on it?
A current of 3 A flows through a straight conductor. What will be the direction of the magnetic field at a point above the conductor if the current flows from south to north?
A proton moves perpendicular to a uniform magnetic field. What is the shape of its path?
A rectangular coil of area 0.02 m² and 100 turns carries a current of 1 A. It is placed in a uniform magnetic field of 0.5 T. Calculate the maximum torque acting on the coil.
A wire of length 0.5 m carrying a current of 2 A is placed perpendicular to a magnetic field of 0.2 T. Calculate the force on the wire.
Calculate the magnetic field at a distance of 2 cm from a long straight wire carrying a current of 5 A. (μ₀ = 4π × 10⁻⁷ T·m/A)
Describe the working principle of an electric motor.
Explain why the core of an electromagnet is made of soft iron.
Explain why two parallel wires carrying currents in the same direction attract each other.
State Ampère’s circuital law.
State Fleming’s right-hand rule.
State the formula for the force on a charged particle moving in a magnetic field.
State the right-hand thumb rule for determining the direction of the magnetic field around a current-carrying conductor.
Who discovered the magnetic effect of electric current?
