Experiment Description

Experiment

Experiment E11    Law of Electromagnetic Induction (A)


Objectives
  • Study how the induced e.m.f. depends on the number of turns and area of coil
  • Study the induced e.m.f. caused by a linearly varying magnetic field
  • Learn to use CRO to measure the induced e.m.f.
  • Demonstrate that the induced e.m.f. due to a sinusoidal magnetic field is also sinusoidal
Description
In this activity, you will measure the induced e.m.f. when a coil is placed in a varying magnetic field. You will use home-made coil frame to vary the shape and area. You will also investigate the induced e.m.f. due to linearly varying magnetic field.

In Experiment 1, you will compare the current in the solenoid and the induced e.m.f. in a coil with a CRO. You will then measure the induced e.m.f. for coils of different number of turns.

Experiment 2 is similar to investigating the number of turns of coil in Experiment 1, except that you will use coils of different shapes but with the same area, and then coils of the same shape but with different areas.

In Experiment 3, you will set the signal generator to give sawtooth waveform (linearly varying) and study the corresponding induced e.m.f.

Apparatus
solenoid (high density) [1]
signal generator [1]
single beam CRO [1]
cardboard paper [1]
0.6 mm PVC tinned copper wire [1 reel]
search coil (axial) [1]
magnetic wire [1 reel]
Experiment