G and E fields

Question 1

Define gravitational field.

Answer 1

A region around a mass where another mass experiences a force of attraction.

Question 2

True or false: Gravitational fields are always attractive.

Answer 2

TRUE

Question 3

What is the unit of gravitational field strength?

Answer 3

Newtons per kilogram (N/kg).

Question 4

Fill in the blank: The gravitational field strength on Earth is approximately _______.

Answer 4

9.81 N/kg

Question 5

Define electric field.

Answer 5

A region around a charged particle where other charged particles experience a force.

Question 6

True or false: Electric fields can be both attractive and repulsive.

Answer 6

TRUE

Question 7

What is the unit of electric field strength?

Answer 7

Volts per meter (V/m).

Question 8

Fill in the blank: The electric field strength due to a point charge decreases with _______.

Answer 8

distance squared

Question 9

What is the formula for gravitational force?

Answer 9

F = G(m1*m2)/r^2, where G is the gravitational constant.

Question 10

Define gravitational potential energy.

Answer 10

The energy an object possesses due to its position in a gravitational field.

Question 11

Fill in the blank: Gravitational potential energy is given by the formula _______.

Answer 11

PE = mgh

Question 12

What does G represent in gravitational equations?

Answer 12

The universal gravitational constant, approximately 6.674 × 10^-11 N(m/kg)^2.

Question 13

True or false: The strength of a gravitational field depends on the distance from the mass.

Answer 13

TRUE

Question 14

What is electric potential?

Answer 14

The work done per unit charge in bringing a charge from infinity to a point.

Question 15

Fill in the blank: Electric potential is measured in _______.

Answer 15

Volts (V)

Question 16

Define equipotential surface.

Answer 16

A surface on which the electric potential is the same at every point.

Question 17

What is the relationship between electric field and electric potential?

Answer 17

The electric field is the negative gradient of electric potential.

Question 18

Fill in the blank: The gravitational field strength is equal to the gradient of _______.

Answer 18

gravitational potential

Question 19

What is the principle of superposition in electric fields?

Answer 19

The total electric field is the vector sum of individual fields.

Question 20

True or false: Electric field lines point away from negative charges.

Answer 20

FALSE

Question 21

Define Coulomb’s law.

Answer 21

The law stating that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 22

Fill in the blank: Coulomb’s law is given by F = k(q1*q2)/r^2, where k is the _______.

Answer 22

Coulomb’s constant

Question 23

What is the gravitational constant?

Answer 23

A constant used in the calculation of gravitational force, denoted as G.

Question 24

What does the term field lines refer to?

Answer 24

Imaginary lines representing the direction and strength of a field.

Question 25

True or false: Field lines can cross each other.

Answer 25

FALSE

Question 26

What is the effect of **mass** on gravitational field strength?

Answer 26

Greater mass results in a stronger gravitational field.

Question 27

What is the effect of **charge** on electric field strength?

Answer 27

Greater charge results in a stronger electric field.

Question 28

Fill in the blank: The **electric field** direction is defined as the direction a _______ charge would move.

Answer 28

positive

Question 29

Define **uniform electric field**.

Answer 29

An electric field with constant strength and direction throughout.

Question 30

What is the shape of **gravitational field lines** around a planet?

Answer 30

They radiate inward towards the center of the planet.

Question 31

Fill in the blank: The **electric field** between two parallel plates is _______.

Answer 31

uniform

Question 32

What happens to the gravitational field strength as distance increases?

Answer 32

It decreases with the square of the distance.

Question 33

True or false: The electric field strength is stronger closer to the charge.

Answer 33

TRUE

Question 34

What is the relationship between **work** and **electric potential energy**?

Answer 34

Work done on a charge changes its electric potential energy.

Question 35

Fill in the blank: The **gravitational potential** at infinity is _______.

Answer 35

zero

Question 36

What is the concept of **field strength**?

Answer 36

The force experienced by a unit charge or mass in a field.

Question 37

Define **polarization** in electric fields.

Answer 37

The separation of charges within an object due to an external electric field.

Question 38

What is the effect of **distance** on electric force?

Answer 38

Electric force decreases with the square of the distance between charges.

Question 39

Fill in the blank: The **electric field** is stronger near _______.

Answer 39

the charge