If the electrical resistance of a typical substance suddenly drops to zero, then the substance is called
Asuper conductor
Bsemiconductor
Cconductor
Dinsulator
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മിന്നൽ വൈദ്യുതി ഡിസ്ചാർജ് ആണെന്ന് തെളിയിച്ചത് ആര്?
Which of the following devices is based on the principle of electromagnetic induction?
Which of the following statements is/are true for a current carrying straight conductor?
- i) The magnetic field lines are concentric circles with conductor at the centre.
- (ii) The strength of the magnetic field increases as we move away from the conductor.
- (iii) The direction of magnetic field can be determined using right hand thumb rule.
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The unit of current is