Tag: electro-magnetism
Questions Related to electro-magnetism
Consider the following statements:
(a) The magnitude and direction of alternating current reverses periodically.
(b) Frequency of alternating current in india is 50 Hz.
(c) The frequency of direct current is zero.
Which of the above statements are correct?
Choose the correct option
A neon lamp is connected to a voltage a.c. source. The voltage is gradually increased from zero volt. It is observed that the neon flashes at 50 V. The a.c. source is now replaced by a variable dc source and the experiment is repeated. The neon bulb will flash at
Assertion: Ohm's law cannot be applied to a.c circuit.
Reason: Resistance offered by capacitor for a.c source depends upon the frequency of the source.
Direct current is observed in :
A low frequency AC current is passed through a galvanometer. What will be the behavior of the pointer needle?
What is not a characteristic of alternating current ?
which is the correct option?
AC is not suitable for electrolysis because
Which of the statements is false?
AC: Alternating current
DC: Direct Current