A very sensitive, centre-zero voltmeter is connected to the two terminals of a solenoid (long coil) as shown in the figure.As the S pole of a cylindrical magnet is being inserted slowly into the left-hand end of the solenoid, the pointer of the voltmeter deflects slightly to the right. State what is observed when the magnet is rapidly withdrawn from the same left-hand end of the solenoid.*1 pointGreater deflection of the pointer to the leftGreater deflection of the pointer to the rightLower deflection of the pointer to the leftLower deflection of the pointer to the right

Fig 9.1 shows a magnet on the end of a spring and a coil of wire connected to a sensitive center-zero galvanometer. The magnet can move freely through the coil. The magnet is pulled down and released. Describe and explain what happens to the needle of a sensitive galvanometer.

A bar magnet is moved towards a solenoid which is connected to a sensitive ammeter.  Which of the following will NOT occur as the magnet is moved towards the solenoid?A potential difference is induced across the solenoidThe lines of magnetic flux (magnetic field lines) of the bar magnet cut through the solenoidEnergy will be transferred from the bar magnet to the charges in the solenoidAn alternating current flows through the solenoid2Which of the following is NOT used in the construction of a transformer?A primary coilA soft magnetic coreA resistorA secondary coil3Which of the following statements is incorrect?When direct current is supplied to the primary coil of a transformer, an alternating magnetic field is produced around it (and within the core)The changing (alternating) magnetic field within the core of a transformer causes an alternating potential difference to be induced across the secondary coilIn a step-down transformer, there are fewer turns on the secondary coil than on the primary coilIn a step-up transformer, there are more turns on the secondary coil than on the primary coil4An alternating potential difference of 240 V is applied across the primary coil of a transformer.  If there are 600 turns on its primary coil and 30 turns on its secondary coil, calculate the potential difference across its secondary coil.12 V75 V4,800 V (4.8 kV)4,320,000 V (4.32 MV)5There are 1000 turns on the secondary coil of a step-up transformer and there is a potential difference of 2 kV across it.  There are 50 times fewer turns on its primary coil.  Calculate the potential difference across its primary coil.0.04 V0.1 V40 V100 V

The diagram shows a magnet being moved into a coil of wire. The reading on the voltmeter increases to +3 as the magnet moves into the wire. What has been induced in the coil of wire? Give the full name, not an abbreviation.

A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 m long and 0.2 m in diameter. The magnetic intensity at the center of the solenoid when a current of 2 A flows through it is:

Describe the magnetic field of a solenoid.