Class 10ScienceMagnetic Effects of Electric CurrentMix Examples - Magnetic Effects of Electric Current
EasyExplain briefly different methods of producing induced electromotive force $(emf)$.
(N/A) $(i)$ By changing the magnetic flux linked with a coil,an $emf$ can be induced. This can be achieved by varying the current in a neighboring coil (mutual induction).
$(ii)$ By moving a magnet towards or away from a stationary coil,the magnetic field lines passing through the coil change,thereby inducing an $emf$ (electromagnetic induction).
$(iii)$ By rotating a coil within a uniform magnetic field,the angle between the area vector and the magnetic field changes,resulting in a change in magnetic flux and the induction of an $emf$.
$(ii)$ By moving a magnet towards or away from a stationary coil,the magnetic field lines passing through the coil change,thereby inducing an $emf$ (electromagnetic induction).
$(iii)$ By rotating a coil within a uniform magnetic field,the angle between the area vector and the magnetic field changes,resulting in a change in magnetic flux and the induction of an $emf$.
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Similar Questions
All the distribution circuits for domestic purposes are parallel connections.
Easy
View Solution$A$ student performs an experiment to study the magnetic effect of current around a current-carrying straight conductor with the help of a magnetic compass.
He reports that:
$(i)$ the degree of deflection of the magnetic compass increases when the compass is moved away from the conductor.
$(ii)$ the degree of deflection of the magnetic compass increases when the current through the conductor is increased.
Which of the above observations of the student appears to be wrong and why?
He reports that:
$(i)$ the degree of deflection of the magnetic compass increases when the compass is moved away from the conductor.
$(ii)$ the degree of deflection of the magnetic compass increases when the current through the conductor is increased.
Which of the above observations of the student appears to be wrong and why?
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View SolutionAn electric generator works on the principle of electromagnetic induction.
Easy
View Solution$(a)$ Define electromagnetic induction.
$(b)$ Two coils $P$ and $S$ are wound over the same iron core. Coil $P$ is connected to a battery and a key,and coil $S$ is connected to a galvanometer. Draw a suitable diagram of this arrangement and write your observations when:
$(i)$ current in the coil $P$ is started by closing the key.
$(ii)$ current continues to flow in coil $P$.
$(iii)$ current in coil $P$ is stopped by removing the key.
Explain the reason for such observations.
$(b)$ Two coils $P$ and $S$ are wound over the same iron core. Coil $P$ is connected to a battery and a key,and coil $S$ is connected to a galvanometer. Draw a suitable diagram of this arrangement and write your observations when:
$(i)$ current in the coil $P$ is started by closing the key.
$(ii)$ current continues to flow in coil $P$.
$(iii)$ current in coil $P$ is stopped by removing the key.
Explain the reason for such observations.
Medium
View Solution$A$ student,while studying the force experienced by a current-carrying conductor in a magnetic field,records the following observations:
$(i)$ The force experienced by the conductor increases as the current is increased.
$(ii)$ The force experienced by the conductor decreases as the strength of the magnetic field is increased.
Which of the two observations is correct and why?
$(i)$ The force experienced by the conductor increases as the current is increased.
$(ii)$ The force experienced by the conductor decreases as the strength of the magnetic field is increased.
Which of the two observations is correct and why?
Medium
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