To convert an $AC$ generator into a $DC$ generator,

  • A
    a stronger magnetic field has to be used.
  • B
    slip rings and brushes must be used.
  • C
    a split-ring type commutator must be used.
  • D
    a rectangular wire loop has to be used.

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$A$ uniform magnetic field is directed vertically upwards. In which direction should an $\alpha$-particle (which is a positively charged particle) be projected in this field so that it is deflected southwards? Name and state the rule used to find the direction in this case.

Which instrument is used to convert electrical energy into mechanical energy?

What does the thumb indicate in Fleming's right-hand rule?

When is the force experienced by a current-carrying conductor placed in a magnetic field largest?

State Fleming's left-hand rule.

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