Galvanometer Quiz

What is the principle behind electromagnetic induction?

• The interaction between electric charges and magnetic fields

• The generation of an electric current by changing magnetic fields

• The attraction and repulsion between magnets

• The conversion of electrical energy into mechanical energy

How does a galvanometer work?

• It uses a magnetic field to deflect a needle proportional to the current

• It measures the voltage across a component

• It converts electrical energy into light

• It stores electrical energy

What happens to the magnetic field inside a solenoid when the current is increased?

• The magnetic field decreases

• The magnetic field remains the same

• The magnetic field increases

• The magnetic field disappears

Which of the following is true about the interaction between current and magnetic fields?

• A current-carrying conductor in a magnetic field experiences a torque

• A magnetic field can only exist in the presence of a current

• Current and magnetic fields do not interact

• A magnetic field repels a current-carrying conductor

In a galvanometer, what is the role of the coil?

• To provide resistance

• To generate a magnetic field

• To deflect the needle

• To store charge

What is the effect of increasing the number of turns in a solenoid on the magnetic field strength?

• The magnetic field strength decreases

• The magnetic field strength remains constant

• The magnetic field strength increases

• The magnetic field strength becomes zero

Which of the following best describes the relationship between current and magnetic fields in a solenoid?

• The magnetic field is inversely proportional to the current

• The magnetic field is directly proportional to the current

• The magnetic field is independent of the current

• The magnetic field is inversely proportional to the square of the current

What happens to the direction of the magnetic field in a solenoid if the direction of the current is reversed?

• The magnetic field strength doubles

• The magnetic field direction reverses

• The magnetic field strength is halved

• The magnetic field disappears

Why is an iron core often placed inside a solenoid?

• To reduce the solenoid's magnetic field

• To change the magnetic field so it is in a radial direction

• To increase the solenoid’s magnetic field strength

• To convert magnetic energy into thermal energy

Which rule helps determine the direction of the magnetic field around a current-carrying wire?

• Fleming’s Left-Hand Rule

• Right-Hand Rule

• Left-Hand Rule for Induced Current

• Faraday’s Law of Induction