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Please Help With These Physics Problems!! Thank You Very Much For Your Time )

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1 . A 100 – turn coil with an average radius of 0. 04 mm is placed in a uniform magnetic field so that
$ = 609. The strength of the field increases at a rate of 0. 250′ I’s . What is the magnitude of the
resulting cut !
20.500 V*
90.251V
2. A circular coil of wire has 300 turns and an average radius of 2. 00 cm . The coil is placed at a
GOquot; angle to the uniform magnetic field between the two poles of’ a large electromagnet . The
strength of the field changes at a rate of – 1.300 I’s . What is the magnitude of the resulting
induced ent !quot;
GOOGTV
90.052 V
90.098 V
3. What is the role of a commutator in an electric generator ? (‘ 1 point ;
It carries electric current from the generator to the load .
OIt causes the conf to vary sinusoidally .
O It maintains a constant sign for the conf .
It maintains a uniform and constant magnetic field .Science