Gravitational and Electric Fields Concepts

The video tutorial explains the concepts of gravitational and electric fields, highlighting their similarities and differences. It covers field strength, constants, and the inverse square law. The tutorial delves into potential energy, work, and the equations governing these fields. It also discusses satellite motion, Kepler's third law, escape velocity, and the concept of closest approach. Finally, it explores uniform electric fields and their properties.

What is the main difference between gravitational and electric fields?

• Gravitational fields affect only charged objects.

• Electric fields affect all objects.

• Gravitational fields affect all objects, while electric fields affect only charged objects.

• Electric fields are stronger than gravitational fields.

What is the unit of gravitational field strength?

• Newtons per Coulomb

• Newtons per kilogram

• Joules per kilogram

• Volts per meter

What constant is used in the equation for gravitational field strength?

• Planck's constant

• Coulomb's constant

• Universal gravitational constant

• Boltzmann constant

How is electric field strength represented symbolically?

• G

• E

• K

• F

What is the relationship between gravitational potential energy and distance in a uniform field?

• It is directly proportional to the distance.

• It is independent of the distance.

• It is inversely proportional to the distance.

• It is directly proportional to the square of the distance.

What is the definition of potential in a field?

• The work required to move a unit mass from infinity to a point.

• The force experienced by a unit charge at a point.

• The energy stored in a field.

• The acceleration due to gravity at a point.

What does Kepler's Third Law state about the time period of a satellite?

• It is proportional to the cube of the radius.

• It is proportional to the square of the radius.

• It is inversely proportional to the square of the radius.

• It is inversely proportional to the cube of the radius.

What is the escape velocity of an object dependent on?

• The mass of the object only.

• The radius of the planet only.

• Both the mass of the planet and the radius of the planet.

• The distance from the center of the planet only.

In a uniform electric field, what is the trajectory of a charged particle entering at a right angle?

• Parabolic

• Elliptical

• Linear

• Circular

What happens to a positively charged particle moving towards another positive charge?

• It is repelled and decelerates.

• It moves in a circular path around it.

• It is attracted and accelerates towards it.

• It remains stationary.