I need help with 2-6 Connect the terminal of the large solenoid to the terminal

Question

I need help with 2-6 Connect the terminal of the large solenoid to the terminal of the center reading galvanometer. Push the north end of the bar magnet into the end of the solenoid remote from the terminals, observing the galvanometer during the process. Now hold the magnet steady for several second and then pull it out of the coil. Repeat these procedures varying the speed of the magnet. Q1. Does the galvanometer deflect to the left or the right when a) the is being pushed in b) the magnet is being pulled out c) the magnet is being held steady? Q2. How does the maximum deflection of the galvanometer appear to depend on the speed with which the magnet is moved? Why? Q3. How do your observations lend support to the statement: "A steady magnetic field cannot induce currents in a stationary conductor"? Repeat steps 1 and 2, this time pushing the south end of the magnet into the end of the solenoid. With the terminals of the larger-diameter solenoid still connected to the galvanometer, cannot those of the smaller coil, via a switch, to a power supply as shown in Fig. 1. Beware of accidental shorting between the solenoid terminals. When the switch is closed, the current through the smaller coil creates a magnetic field, as should be observed in the deflection produced of a nearby compass needle. Open the switch and place the smaller solenoid inside the larger. Adjust the variable resistor to give minimum current (turn knob counter-clockwise) and close the switch. Turn the knob rapidly from the minimum to the maximum current setting while observing the galvanometer. Leave it at the maximum current setting for several seconds and then turn it rapidly to the minimum current setting, again while observing the galvanometer. Q4. Does the galvanometer deflect to the left or right while the current in the smaller coil is a) increasing b) decreasing c) not changing? Q5. State, giving reasons, whether the answers given to Q.4. are to be expected on the basis of those given in Q.1.

Explanation / Answer

A2)

1) a) right

b) left

c) no deflection

2) The flux linked with the coil changes at a faster rate producing more current which is directly proportional to rate of change of flux

3) When magnetic field is stationary there is no change in flux linked with the coil and hence no current is produced.

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