Electric Current and Magnetic Fields Quiz for Class 10 Students

Electric Current and Magnetic Effect

• Electric current produces a magnetic field around the current-carrying wire.
• The strength of the magnetic field depends on the amount of electric current flowing through the wire.

Magnetic Field Strength

• When the current in a wire is increased, the strength of the magnetic field around the wire also increases.
• Conversely, decreasing the current reduces the magnetic field strength.

Magnetic Field Direction

• The direction of the magnetic field around a current-carrying wire is reversed when the direction of the current is reversed.
• The direction of the magnetic field can be determined using the right-hand rule.

Right-Hand Rule

• The right-hand rule is used to determine the direction of the magnetic field around a current-carrying wire.
• To apply the rule, point the thumb of your right hand in the direction of the current, and your fingers will curl in the direction of the magnetic field.

Solenoid and Magnetic Field Strength

• When a current-carrying wire is coiled into a solenoid, the strength of the magnetic field within the solenoid is increased.
• The magnetic field is strongest inside the solenoid and weakest outside.

Electromagnet and Iron Core

• The iron core in an electromagnet serves to increase the magnetic field strength.
• The iron core becomes magnetized when current flows through the coil, increasing the magnetic field strength and creating a stronger electromagnet.