Embibe Experts Solutions for Chapter: Alternating Current, Exercise 1: Exercise

The phase difference between emf and current in a pure resistive circuit is 

In an Ac circuit, the phase difference between current and emf is $45°$. The circuit contains _____.

The phase difference between current and voltage in a purely resistive AC circuit is

There is no phase difference between source of ac and current when_____connected with source.

A choke coil

The average power in a $L-C-R$ circuit depends upon

The inductance of the oscillatory circuit of the ratio station is $10 \mathrm{mH}$ and its capacitance is $0.25 \mathrm{\mu F}$. Taking the effect of resistance negligible, wavelength of the broadcasted waves will be (velocity of light $=3.0\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1},\mathrm{ }\mathrm{\pi }=3.14$),

A step-down transformer has turn ratio $20:1$. If $8 \mathrm{V}$ is applied across $0.4 \mathrm{\Omega }$ secondary then the primary current will be