Which one of the following is NOT a basic property of electric charge?
Charges can be created and destroyed in an isolated system
Correct Answer: (d) Charges can be created and destroyed in an isolated system
Explanation: Charges cannot be created or destroyed in an isolated system, according to the law of conservation of charge.
If the length of a copper wire is increased by twice, then its resistivity will be
A current through a horizontal power line flows in east to west direction. What will be the direction of magnetic field at a point directly below it when viewed from east end?
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Which of the following household items does NOT use the heating effect of current?
The magnetic field produced by a current-carrying wire at a given point depends on which of the following factors?
If the resistance of a conductor is increased to three times, then the current will be: (voltage V remains constant)