Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 21

EASY

NEET

IMPORTANT

Earn 100

Three identical emf sources are attached to a single circuit element: a resistor, a capacitor, or an inductor. The current amplitude is then measured as a function of frequency. Which one of the following curve corresponds to inductive circuit?

42.86% studentsanswered this correctly

Important Questions on Electromagnetic Induction and Alternating Currents

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 22

The figure shows an LCR network connected to a $300 V$ $A C$ supply. The circuit elements are such that $R = X_{L} =$ $X_{C} = 10 Ω .$ Three voltmeters $V_{1}, V_{2}$ and $V_{3}$ are connected as shown. Which of the following represents the correct set of readings of the voltmeters?

Question Image

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 23

If emf

E = 4 \cos 1000 t v o l t

is applied to an

L - R

circuit of inductance

3 mH

and resistance

4 Ω,

the amplitude of current in the circuit is

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 24

In an AC circuit, the current flowing is

I = 5 \sin (100 t - \frac{π}{2}) A

and the potential difference is

e = 200 \sin (100 t)

. The power consumption is equal to

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 25

A generator produces a voltage that is given by

V = 240 V \sin (120 t)

, where

t

is in

seconds

. The frequency and r.m.s. voltage are

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 26

The peak value of an alternating e.m.f given by

E = E_{0} \cos ω t,

is

10 V

and frequency is

50 Hz .

At time

t = (\frac{1}{600}) \sec,

the instantaneous value of e.m.f is:

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 27

Which of the following does not use the application of eddy current ?

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 28

A square coil

10^{- 2} m^{2}

area is placed perpendicular to a uniform magnetic field of intensity

10^{3} Wb m^{- 2}

. The magnetic flux through the coil is

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 29

A field of

\frac{5 \times 10^{4}}{π}

ampere-turns per meter acts at a right angle to a coil of

50

turns of area

10^{- 2} m^{2}

. The coil is removed from the field in

0.1

second. Then the induced emf in the coil is