274691
The transformation ratio in the step-up transformer is
1 one
2 greater than one
3 less than one
4 the ratio greater or less than one depends on the other factor
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274683
The transformer voltage induced in the secondary coil of a transformer is mainly due to
1 a varying electric field
2 a varying magnetic field
3 the vibrations of the primary coil
4 the iron core of the transformer
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274684
The loss of energy in the form of heat in the iron core of a transformer is
1 iron loss
2 mechanical loss
3 copper loss
4 None of these
Explanation:
(a) Iron loss is the energy loss in the form of heat due to the formation of eddy currents in the iron core of the transformer.
NCERT Page-260 / N-196
AC (NCERT)
274685
Which among the following, is not a cause for power loss in a transformer-
1 Eddy currentsare produced in the soft iron core of a transformer.
2 Electric Flux sharingis not properly done in primary and secondary coils.
3 Humming soundprodued in the tranformers due to magnetostriction.
4 Primary coilis made up of a very thick copper wire.
Explanation:
(d) As primary coil made of thick copper wire has very less $\text{R}$. Therefore negligible power loss. Rest all options are reasons for power losses in a transformer.
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AC (NCERT)
274691
The transformation ratio in the step-up transformer is
1 one
2 greater than one
3 less than one
4 the ratio greater or less than one depends on the other factor
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274683
The transformer voltage induced in the secondary coil of a transformer is mainly due to
1 a varying electric field
2 a varying magnetic field
3 the vibrations of the primary coil
4 the iron core of the transformer
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274684
The loss of energy in the form of heat in the iron core of a transformer is
1 iron loss
2 mechanical loss
3 copper loss
4 None of these
Explanation:
(a) Iron loss is the energy loss in the form of heat due to the formation of eddy currents in the iron core of the transformer.
NCERT Page-260 / N-196
AC (NCERT)
274685
Which among the following, is not a cause for power loss in a transformer-
1 Eddy currentsare produced in the soft iron core of a transformer.
2 Electric Flux sharingis not properly done in primary and secondary coils.
3 Humming soundprodued in the tranformers due to magnetostriction.
4 Primary coilis made up of a very thick copper wire.
Explanation:
(d) As primary coil made of thick copper wire has very less $\text{R}$. Therefore negligible power loss. Rest all options are reasons for power losses in a transformer.
274691
The transformation ratio in the step-up transformer is
1 one
2 greater than one
3 less than one
4 the ratio greater or less than one depends on the other factor
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274683
The transformer voltage induced in the secondary coil of a transformer is mainly due to
1 a varying electric field
2 a varying magnetic field
3 the vibrations of the primary coil
4 the iron core of the transformer
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274684
The loss of energy in the form of heat in the iron core of a transformer is
1 iron loss
2 mechanical loss
3 copper loss
4 None of these
Explanation:
(a) Iron loss is the energy loss in the form of heat due to the formation of eddy currents in the iron core of the transformer.
NCERT Page-260 / N-196
AC (NCERT)
274685
Which among the following, is not a cause for power loss in a transformer-
1 Eddy currentsare produced in the soft iron core of a transformer.
2 Electric Flux sharingis not properly done in primary and secondary coils.
3 Humming soundprodued in the tranformers due to magnetostriction.
4 Primary coilis made up of a very thick copper wire.
Explanation:
(d) As primary coil made of thick copper wire has very less $\text{R}$. Therefore negligible power loss. Rest all options are reasons for power losses in a transformer.
274691
The transformation ratio in the step-up transformer is
1 one
2 greater than one
3 less than one
4 the ratio greater or less than one depends on the other factor
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274683
The transformer voltage induced in the secondary coil of a transformer is mainly due to
1 a varying electric field
2 a varying magnetic field
3 the vibrations of the primary coil
4 the iron core of the transformer
Explanation:
(b)
NCERT Page-260 / N-194
AC (NCERT)
274684
The loss of energy in the form of heat in the iron core of a transformer is
1 iron loss
2 mechanical loss
3 copper loss
4 None of these
Explanation:
(a) Iron loss is the energy loss in the form of heat due to the formation of eddy currents in the iron core of the transformer.
NCERT Page-260 / N-196
AC (NCERT)
274685
Which among the following, is not a cause for power loss in a transformer-
1 Eddy currentsare produced in the soft iron core of a transformer.
2 Electric Flux sharingis not properly done in primary and secondary coils.
3 Humming soundprodued in the tranformers due to magnetostriction.
4 Primary coilis made up of a very thick copper wire.
Explanation:
(d) As primary coil made of thick copper wire has very less $\text{R}$. Therefore negligible power loss. Rest all options are reasons for power losses in a transformer.