Quiz about 4.2 Electrostatic and gravitational fields

Question 1

There are two types of electric charges....

Accepted Answer

positive

Accepted Answer

negative

Answer

up

Answer

down

Answer

neutral

Question 2

Which diagram(s) show the correct electric field around a charge?

Accepted Answer

Accepted Answer

Question 3

At which point is the electric field the strongest?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 4

Which graph best represents the relationship between the strength of an electric field and distance from a point charge?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 5

What does it mean when the electric field lines are close together?

Accepted Answer

The field is strong

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the field is positive

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the field is negative

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the field is weak

Question 6

In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?

Accepted Answer

Left

Answer

Right

Answer

Up

Answer

Down

Question 7

Which of the following statements is false about electric field lines

Accepted Answer

electric field lines are always straight lines

Answer

electric field lines cannot cross

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electric field lines point away from positive charge

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electric field lines show how a proton would move in an electric field

Question 8

Which definition is correct?

Accepted Answer

Electric potential energy is the energy of an object due to its position in a Electric field.

Answer

Electric potential energy is the acceleration of an object due to its position in a Electric field.

Answer

Electric potential energy is the energy of an object due to its position in a magnetic field.

Answer

Electric potential energy is the energy of an object due to its position in the field.

Question 9

As shown above, two particles, each of charge +Q, are fixedat opposite corners of a square that lies in the plane of the page. A positive test charge +q is placed at a third corner. What is the direction of the force on the test charge due to the other two charges>

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 10

What is the definition of Electric Field Strength?

Accepted Answer

Electric Field Strength is the force experienced by a unit charge placed in an electric field.

Answer

Electric Field Strength is the temperature of an electric field.

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Electric Field Strength is the speed of an electric field.

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The force experience per unit mass of a test charge

Question 11

What is the missing term?

$$E\ =\ \frac{F}{?}$$

Accepted Answer

q

Answer

E

Answer

m

Answer

F

Question 12

What is the missing term?

$$g\ =\ \frac{F}{?}$$

Accepted Answer

m

Answer

E

Answer

q

Answer

F

Question 13

The correct units of Electric field strength are?

(2 answers)

Accepted Answer

$$Vm^{-1}$$

Accepted Answer

$$NC^{-1}$$

Answer

$$NC$$

Answer

$$N$$

Question 14

The correct units of gravitational field strength are?

(2 answers)

Accepted Answer

$$ms^{-2}$$

Accepted Answer

$$Nkg^{-1}$$

Answer

$$NC$$

Answer

$$N$$

Question 15

The constant $$\frac{1}{4\pi\epsilon_0}$$ can be shorted to what value?

Accepted Answer

$$9\ imes10^9$$

Answer

$$8.85 imes10^{-12}$$

Answer

$$9 imes10^{-9}$$

Answer

$$1.60\ imes10^{-19}$$

Question 16

What is the definition of Gravitational Field Strength?

Accepted Answer

Gravitational Field Strength is the force experienced by a unit mass placed in a gravitational field.

Answer

Gravitational Field Strength is the temperature of an gravitational field.

Answer

Gravitational Field Strength is the speed of an electric field.

Answer

The force experienced per unit charge of a test mass

Question 17

Mass is always...?

Accepted Answer

Positive

Answer

negative

Answer

heavy

Answer

neutral

Question 18

You may see gravitational field equations written with a minus sign in front of them. Why is this?

Accepted Answer

To show that gravity is always an attractive force

Answer

Because the person writing it is a silly billy.

Answer

To show that gravity is always a repulsive force

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To show that mass is always negative

Question 19

Which definition is correct?

Accepted Answer

Gravitational potential energy is the energy of an object due to its position in a gravitational field.

Answer

Gravitational potential energy is the energy of an object due to its position in a magnetic field.

Answer

Gravitational potential energy is the energy of an object due to its position in the field.

Answer

Gravitational potential energy is the acceleration of an object due to its position in a gravitational field.

Question 20

The gravitational potential energy is zero at

Accepted Answer

infinity

Answer

just above the surface

Answer

the surface

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just before infinity

Question 21

Which equation shows the gravitational potential, V?

Accepted Answer

$$V\ =\ -\ \frac{G\ M}{r}$$

Answer

$$V\ =\ -\ \frac{G\ M}{r^2}$$

Answer

$$V\ =\ \frac{G\ M}{r^2}$$

Answer

$$V\ =\ \ \frac{G\ M}{r}$$

Question 22

What does 'Potential' (V) mean?

Accepted Answer

Potential is the energy PER UNIT MASS/CHARGE.

You can find the potential at point in a field.

Answer

Potential is the TOTAL ENERGY between two charges/masses.

There has to be at least two charges/masses

Answer

Potential is the energy PER UNIT MASS/CHARGE.

There has to be at least two charges/masses

Answer

Potential is the TOTAL ENERGY between two charges/masses.

You can find the potential at point in a field.

4.2 Electrostatic and gravitational fields

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