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Farradays Law

Total questions: 13

Worksheet time: 29mins

Name
Class
Date
1.
___ Law defines the magnetic field generated by a long straight wire
a)
Lenz'
b)
Faraday's
c)
Ampere's
2.
___ Law says that the Induced current is proportional to the change of magnetic flux 
a)
Lenz'
b)
Faraday's
c)
Ampere's
3.
___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in flux
a)
Lenz'
b)
Faraday's
c)
Ampere's
4.
If you wrap more coils around an electromagnet, it will become...
a)
brighter
b)
stronger
c)
weaker
d)
invisible
5.
Find the direction of the magnetic force.
a)
Into the screen
b)
Out of the screen
c)
Right
d)
Left
6.
Find the direction of the magnetic force.
a)
Down
b)
Into the screen
c)
Out of the screen
d)
Up
7.
A 4.0 m long cord is lying perpendicular to Earth's magnetic field of 5.6X10-5 T. If the cord is carrying a current of 11.0 A, what magnetic force is acting on the cord?
a)
2.03X10-5 N
b)
0.002464 N
c)
2.46X107 N
d)
7.86X105 N
8.
13.7 Based on this picture, which side will have a higher voltage?
a)
Secondary
b)
Primary
c)
Both sides have the same voltage
d)
Cannot be determined
9.

Der magnetische Fluss durch eine Leiterschleife ist umso grösser je

a)

grösser die Windungszahl der Leiterschleife ist

b)

je grösser die magnetische Feldstärke ist

c)

je kleiner der Winkel zwischen Feldlinien und Normalenvektor ist

d)

je grösser die Querschnittfläche ist

10.

In welchem Fall ist der magnetische Fluss am grössten?

a)
b)
c)
d)
11.

A coil of wire of 20 turns has across sectional area of 0.1 m2. A magnetic field of 0.5T passes through the coil parallel to the plane of the coil. What is the total magnetic flux through the coil?

a)

0 Wb

b)

0.5 Wb

c)

0.86 Wb

d)

1 Wb

12.

A uniform magnetic field its intensity is 3x10-3 T pass an

area of coil with 100 turns which makes 60 angle with the coil. What is the area of the coil if the magnetic flux is 0.15 Wb?

a)

0 m2

b)

0.5 m2

c)

0.57 m2

d)

1 m2

13.

The diagram shows four loops (A, B, C, D) are placed in uniform magnetic field B. use the values in tis diagram then order the values of magnetic flux ascending.

(Hint: circle area A= π r2)

a)

ɸA < ɸB < ɸC < ɸD

b)

ɸD < ɸB < ɸC < ɸA

c)

ɸD < ɸC < ɸB < ɸA

d)

ɸA < ɸB < ɸD < ɸC