Exploring Electric Current

What is the magnetic effect of electric current?

• Electric current can only flow in a vacuum.

• Electric current produces a magnetic field.

• Electric current has no effect on magnetic fields.

• Electric current generates heat only.

How does a compass react to an electric current?

• A compass needle attracts to the electric current directly.

• A compass needle remains unaffected by electric currents.

• A compass needle spins randomly without any direction.

• A compass needle deflects due to the magnetic field generated by the electric current.

What is the principle behind electromagnets?

• Electromagnets can only function in a vacuum.

• Electromagnets are made from permanent magnets.

• Electromagnets work by generating a magnetic field through electric current.

• Electromagnets operate solely on magnetic fields without electricity.

Name one application of electric current in daily life.

• Lighting up street lamps

• Powering household appliances like refrigerators

• Heating water in kettles

• Charging mobile phones

How does electric current produce heat?

• Electric current produces heat through resistance in conductors, converting electrical energy into thermal energy.

• Electric current cools down materials by reducing their temperature.

• Electric current generates light without producing heat.

• Electric current creates sound waves instead of heat.

What is the role of electric current in electric motors?

• Electric current is used to store energy in batteries.

• Electric current cools the motor to prevent overheating.

• Electric current generates a magnetic field that produces torque to rotate the motor.

• Electric current powers the lights in the motor's control panel.

Explain how electric current can create a magnetic field.

• Electric current creates a magnetic field due to the movement of charged particles in the conductor.

• Magnetic fields are created by static electricity.

• Electric current can only flow in a vacuum.

• Electric current has no effect on magnetic fields.

What is the function of a solenoid?

• To store electrical energy for later use.

• The function of a solenoid is to convert electrical energy into linear mechanical motion.

• To convert mechanical energy into electrical energy.

• To regulate the flow of fluids in a system.

Describe how electric current is used in transformers.

• Electric current is used to power the transformer directly without inducing voltage.

• Electric current in transformers is only used for heating purposes.

• Electric current is irrelevant to the operation of transformers.

• Electric current in transformers is used to create a magnetic field that induces voltage in another coil.

What is the relationship between electric current and magnetism?

• Magnetism can only exist without electric current.

• Electric current creates a magnetic field, and a changing magnetic field can induce electric current.

• Electric current has no effect on magnetism.

• Electric current and magnetism are completely unrelated.