Electricity and Magnetism Fundamentals

What is the diameter of an atom?

• About 10^-10 m
• About 10^-10 cm
• About 10^-10 mm
• About 10^-10 µm

The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages. This is known as

• Joule's Law
• Faraday's second law of electromagnetic induction
• Faraday's first law of electromagnetic induction
• Coulomb's Law

The force of attraction or repulsion between two magnetic poles is inversely proportional to the square of the distance between them. This is known as

• Newton's first law
• Faraday's first law of electromagnetic induction
• Coulomb's first law
• Coulomb's second law

The net electrical charge in an isolated system remains constant. This is known as

• Law of conservation of charge
• Coulomb's first law
• Coulomb's second law
• Law of conservation of energy

The point in a magnet where the intensity of magnetic lines of force is maximum

• Magnetic pole
• South pole
• North pole
• Unit pole

The emf induced in a coil due to the change of its own flux linked with it is called

• Mutually induced emf
• Dynamically induced emf
• Statically induced emf
• Self induced emf

If the solenoid is gripped by the right hand with the fingers pointing the direction of current flow, the outstretched thumb will then point the north pole. This is known as

• Right hand rule
• Helix rule
• End rule
• Cork screw rule

The phenomenon by which a subtracts pieces of iron

• Magnetism
• Electromagnetism
• Naturalism
• Materialism

A law that states that the current in a thermionic diode varies directly with the three-halves power of anode voltage and inversely with the square of the distance between the electrodes, provided operating conditions are such that the current is limited only by the space charge

• Hall's law
• Joule's law
• Child's law
• Coulomb's law

Who developed the electromagnetic theory of light in 1862?

• Heinrich Rudolf Hertz
• Wilhelm Rontgen
• James Clerk Maxwell
• Andre Ampere