Free Printable Electric, Magnetic, and Gravitational Fields

Worksheets

Electric, Magnetic, and Gravitational Fields

Total questions: 22

Worksheet time: 43mins

Name

Class

Date

Which of the following does not create a force field?

gravitational force

centrifugal force

electric force

magnetic force

The definition of gravitational field strength is:

The region of space surrounding a body where other bodies will feel an attractive force due to it.

The region of space surrounding a body where other bodies will feel an repulsive force due to it.

The region of space surrounding a charge where other charges will feel an attractive force due to it.

The region of space surrounding a charge where other charges will feel an repulsive force due to it.

Which statement about a uniform gravitational field is true?

Its magnitude is the same in all directions.

The gravitational potential has the same value at all points within it.

Its direction is opposite to the direction of motion of a test mass released in it.

Its field strength is the same at all points within it.

The closer together the gravitational field lines.....

the weaker the gravitational field strength

the stronger the gravitational field strength

the more repulsive the gravitational field strength

How far out from a mass should the gravitational field lines go....

to where the gravitational field becomes negligable

to twice the diameter of the mass

infinitely far

to four times the diameter of the mass

If you double the mass of both m1 and m2, by what factor will the gravitational force change?

F/4

16F

F/16

Saturn has a surface field strength of 10.4 N kg⁻¹ and a radius of 6.03 × 10⁴ km. What is the mass of Saturn?

4.7 × 10¹⁸ kg

5.7 × 10²⁰ kg

4.7 × 10²⁴ kg

5.7 × 10²⁶ kg

If the radius of an orbit were doubled, what effect would it have on its period of orbit?

no effect

would increase

would decrease

need more information

What happens to the gravitational and electric force if you triple the distance of separation?

1/9

1/3

10.

What is an electric field?

A region in space in which a mass experiences a force due to the earth's mass

A region in space through which electromagnetic radiation is passing

a region in space in which a compass needle experiences a force

A region in space in which an electric charge experiences a force

11.

If the distance between two positive charges increases by a factor of 2, what happens to the force between those charges?

It decreases by a factor of 2.

It does not change.

It increases by a factor of 4.

It decreases by a factor of 4.

12.

What is the strength of the electric force between two charges, each of charge +1 μC, separated by 1 cm?

Asked: Electric force Fe on charges
Given: Distance r between charges = 1 cm = 0.01 m,

charge q1,2 = 1 μC = 1×10 ^-6 C,

Coulomb constant ke = 9 × 10 ^ 9 N m2/C2

$Fe\ =\ \frac{k_eq1q2}{r^2}$

4 lines

13.

In the figure, what is the sign of the charges Q1 and Q2, respectively?

The arrows point towards Q1, so it must be a negative charge, and away from Q2, so it must be a positive charge.

positive and positive

positive and negative

negative and positive

negative and negative

14.

Four charges are placed on the corners of a rectangle as shown. If a positive charge is placed exactly at the center of the rectangle, what would happen to it?

It will move upward.

It will not move.

It will move diagonally to the lower right corner.

It will move to the right.

15.

Magnetic poles that are unlike ________and magnetic poles that are alike ___________.

run; stay

attract; repel

stay; repel

repel; attract

16.

When a magnetic field is applied on a stationary electron, it

remains stationary

spins about its own axis

moves in the direction of the field

moves perpendicular to the direction of the field

17.

An electron and a proton are both initially moving with the same speed and in the same direction at 90˚ to the same uniform magnetic field. They experience magnetic forces, which are initially:

identical

equal in magnitude but opposite in direction

in the same direction and differing in magnitude by a factor of 1840

in opposite directions and differing in magnitude by a factor of 1840

18.

A straight wire carrying a 9.0 A current is in a uniform magnetic field oriented at right angles to the wire. When 75 cm of wire is in the field, the force on the wire is 1.2 N. What is the strength of the magnetic field (B)? HINT: F=I.L.B

= 0.18 N

= 0.18 T

= 0.18 Cm

= 0.18

19.

A straight wire of length 70 cm carries a current of

50 A and makes an angle of 60° with a uniform

magnetic field. If the force on the wire is 1.0 N what is

the magnitude of B?

20mT

22mT

30mT

33mT

20.

A beam of electrons travels at 6.0×10⁶ m/s through a uniform magnetic field of 6.5×10⁻¹ T at right angles to the field. How strong is the force acting on each electron?

= 6.25×10⁻¹³ N

= −6.25×10⁻¹³ N

= −6.25×10⁻¹⁰ N

= −6.25×10⁻¹³ M

21.

Describe the path of a charge moving at right angles in a magnetic field

straight (unchanged)

parabola

circular

sinusoidal

22.

An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is:

zero

north

south

100 %

Electric, Magnetic, and Gravitational Fields

Total questions: 22

Worksheet time: 43mins

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