The use of Helmholtz coils is to produce-

Statement-1 Helmholtz coil is used to obtain uniform magnetic field Statement-2 Magnetic field lines always form closed loop Statement-3 Magnetic field on the line of a straight current carrying wire is always zero

Statement-1 Helmholtz coil is used to obtain uniform magnetic field Statement-2 Magnetic field lines always form closed loop Statement-3 Magnetic field on the line of a straight current carrying wire is always zero

The property of a coil which enables to produce an opposite induced emf in it when the current in the coil changes is called ………. .

Which of the following statements is false for Helmholtz coils ?

The coil of a heater is cut into two cqual halves and only one of them is used in the heater. The ratio of the heat produced by this half of the coil to that produced by the original coil is