Embibe Experts Solutions for Chapter: Current Electricity, Exercise 6: Exercise (Assertion & Reason)

If voltage across a bulb rated $220$ Volt- $100$ Watt drops by $2.5\%$ of its rated value, the percentage of the rated value by which the power would decrease is :

An electron is moving in a circle of radius 5.1 × 10^–11 m. at a frequency of 6.8 × 10¹⁵ revolution/sec. The equivalent current is approximately :-

Assertion : In higher power transmission, 240 V is preferred over 120 V.
Reason : Power loss is more in case of 120 V as compared to 240 V. 

Assertion: The resistance of a coil for direct current is $5 \mathrm{\Omega }$. An alternating current is sent through it. The resistance will remain same.

Reason: The resistance of a coil does not depend upon nature of current.