WorksheetsSP025 Chapter 5 Electromagnetic Induction (C1&C2)
Total questions: 31
Worksheet time: 34mins
into a coil with twice the number of loops,
Can you produce current in a wire with a magnet that is sitting still?
Yes; having a magnet near a wire is enough to excite the electrons
No; the magnetic field has to be changing to excite the electrons
No; magnets cannot create electricity
What happens to the galvanometer if the copper rod is moved upwards?
No change
Deflect to the right
Deflect to the left
Deflect to the right and left
No EMF is induced when?
When the wire is not moving
When the wire is parallel to magnetic field direction
When no lines are cut by the wire
all of the above
If you reverse the direction of movement of a magnet influencing a coil, what happens to the current?
reverses
increases
stays same
decreases
Changing current in a coil produces e.m.f in another, this phenomenon is known as
e.m.f
Self-induction
Induced e.m.f
Mutual induction
The value of mutual inductance is measured
in watts.
in henries.
___________________rule can be used to determine the direction of the induced current produced.
Right Hand Palm
Right Hand Grip
The turn is contained in a magnetic field such that the lines of induction of the magnetic field are parallel to the plane of the turn. Which statement is correct?
An induction current flows clockwise;
The induction current in the coil flows counter-clockwise;
The induction current in the coil will occur when the magnetic field induction changes;
There is no induction current in the coil.
Which coil will have the largest flux?
A
B
C
D
The scenario shown induces a voltage of magnitude V. If the magnet has twice the magnetic field but its motion stopped, how would the induced voltage change?
Voltage would be twice as large in the same direction.
Voltage would be half as large in the same direction.
Voltage would be twice as large in the opposite direction.
No voltage would be induced in the coil.
A circular coil of area 1.5 m2 and number of turns 200 is placed in a 1.4 T magnetic field which is perpendicular to the plane of the coil as shown in the diagram. If this magnetic field is reduced to 0.20 T in 0.01 s, what is the e.m.f. induced in the coil?
1.8 ×102 V
2.4undefinedV
3.0 ×104 V
3.6undefined V
Electric charges must ___ in order to create an observable magnetic field.
exist
be moving
be stationary
disappear
What is the Pole at X
North
South
What happen to the Galvanometer?
Deflected to the right
Deflected to the left
Nothing happen
Click all the factors affecting electromagnetic induction
Strength of magnet
The area of the coil
The speed of movement
Number of turns of coil
The position of poles
A coil of area 30 cm2 and 50 turns is placed perpendicular to the magnetic field of flux density 0.7 T. What is the magnetic flux linked with the coil?
0.021 Wb
0.105 Wb
1050 Wb
1500 Wb
If points C and M are connected by a conducting wire, which statement is not true about the metal rod?
The induced current flows from M to C.
The e.m.f. induced in the rod is B l v.
The end C of the rod is positively charged.
The free electrons in the rod experiences upward magnetic force.
A solenoid of length l and cross-sectional area A contains N turns of wire. Which of the following shows the self-inductance L of the solenoid?
lμ0N2A
2μ0N2πr
μ0N2πr
μ0N2A
A solenoid of cross-sectional area 0.25 cm2 and length 10 cm contains 200 turns of wire and the solenoid is air filled. Calculate the self-inductance L of the solenoid.
7.5 μH
9.6undefined
11undefined
13undefined
If the current in the primary coil decreases uniformly from 12.0 A to zero in 58.0 ms and the e.m.f. induced in the secondary coil is 8.03 V, calculate the mutual inductance, M.
1.66 mH
38.8 mH
39.3 mH
40.5 mH
