Quiz 1

What was Michael Faraday's most significant contribution to science?

• The development of the periodic table

• The discovery of electromagnetic induction

• The invention of the steam engine

• The formulation of the laws of motion

• None of the above

How did Michael Faraday acquire his scientific knowledge?

• He studied at a prestigious university

• He was taught by his scientist parents

• He was self-taught and mentored by Humphry Davy

• He learned through trial and error without guidance

• None of the above

When does a galvanometer show a deflection in an experiment involving electromagnetic induction?

• When the magnet is at rest

• When the magnet moves towards the coil

• When the magnet is held stationary near the coil

• When the magnet is held stationary away from the coil

• None of the above

What does magnetic flux measure?

• The strength of an electric current

• The total magnetic field passing through a surface

• The resistance of a conductor

• The voltage in a circuit

• None of the above

Which of the following best describes electromotive force (EMF)?

• The total amount of magnetic field in a given area

• The force that causes an electric charge to move in a circuit

• The opposition to current flow in a circuit

• The rate at which electrical energy is consumed

• None of the above

According to electromagnetic induction, how does a coil respond to an approaching North pole of a magnet?

• It generates a South pole to attract the magnet

• It generates a North pole to oppose the magnet

• It does not generate any magnetic field

• It induces a current but does not affect the magnet

• None of the above

A loop of wire is placed in a magnetic field. Over a period of 0.2 seconds, the magnetic flux through the loop decreases from 0.5 Weber to 0.1 Weber. What is the induced emf in the loop?

• 0.8 V

• 1.0 V

• 1.5 V

• 2.0 V

• None of the above

The magnetic flux through a coil changes by 0.04 Weber in 50 milliseconds. What is the induced emf in the coil?

• 0.0008 V

• 0.08 V

• 0.8 V

• 8 V

• None of the above

An induced emf is observed in a coil when the magnetic flux through it changes by 0.6 Weber over a time interval of 0.05 seconds. What is the induced emf?

• 0.12 V

• 3.0 V

• 12 V

• 30 V

• None of the above

A magnetic field passes perpendicularly through a loop of area 0.05 m². The magnetic field strength decreases uniformly from 2.0 T to 0.5 T over a time interval of 0.1 seconds. What is the induced emf in the loop?

• 0.25 V

• 0.50 V

• 0.75 V

• 1.0 V

• None of the above