Part 1 Connect the seco down the galvanometer button that gives the highest sens
ID: 2030524 • Letter: P
Question
Part 1 Connect the seco down the galvanometer button that gives the highest sensitivity and thrust the N pole of the bar magnet into the secondary coil. Note the direction of the alvanometer throw. Pull the N pole out and observe the throw. Perform the same operations using the S pole of the magnet. Record the direction of motion of the magnet and that of the induced current by means of a diagram similar to Figure 2. Prove that Lenz's law is obeyed in each case. Use clear diagrams and be sure to include the right-handed circulation of magnetic field around the currents ndary (larger coil, fine wire) as shown in Figure 2. Hold Figure 3Explanation / Answer
I1. In part 1, the ultimate source of energy is the mechanical energy used in moving the magnets through the secondary coils, the motion of bar magnets produce the induced current in the coil which is observed using the galvanometer.
2. The ultimate source of energy in part 3 is the magnetic energy that was stored in the primary coil when the current was passing through primary coil in switch on situation. When switch is off, this magnetic energy starts to decay as current decreases in primary and the change in current and magnetic field causes the induced currents in secondary coil which is observed using galvanometer.