EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Earn 100

Figure shows three regions of magnetic field, each of area $A$ and in each region magnitude of magnetic field decreases at a constant rate $α$ . If $\vec{E}$ is induced electric field then value of line integral $\oint \vec{E} \cdot d \vec{r}$ along the given loop is equal to

50% studentsanswered this correctly

Important Questions on Magnetic Effect of Current and Electromagnetic Induction

MEDIUM

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 5

In an ideal transformer, the voltage and the current in the primary are

200

V

and

2 amp

respectively. If the voltage in the secondary is

2000

V

, then the value of current in the secondary will be:

MEDIUM

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 6

A superconducting loop of radius

R

has self inductance

L

. A uniform and constant magnetic field

B

is applied perpendicular to the plane of the loop. Initially current in this loop is zero. The loop is rotated by

180 °

. The current in the loop after rotation is equal to

HARD

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 7

In the figure shown, the section

E D G F

is fixed. A rod having resistance

R

is moved with constant velocity in a uniform magnetic field

B

as shown in the figure.

D E

and

F G

are smooth and resistanceless. Initially, the capacitor is uncharged. The charge on the capacitor
Question Image

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 8

A vertical rod of length

l

is moving with constant velocity

v

towards east. The vertical component of the earth's magnetic field is

B

and the angle of dip is

θ

. The induced

emf

in the rod is:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 9

Two identical cycle wheels (geometrically) have different number of spokes connected from centre to rim. One is having

20

spokes and other having only

10

(the rim and the spokes are resistance less). One resistance of value

R

is connected between the centre and rim. The current in

R

will be:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 10

A constant force $F$ is being applied on a rod of length ' $l$ ' kept at rest on two parallel conducting rails connected at ends by resistance $R$ in uniform magnetic field $B$ as shown.
Question Image

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 11

A uniform magnetic field exists in region given by

\vec{B} = (3 \hat{i} + 4 \hat{j} + 5 \hat{k}) T

. A rod of length

5 m

is placed along

y

axis is moved along

x

- axis with constant speed

1 m s^{- 1}

. Then induced

e . m . f .

in the rod will be:

MEDIUM

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 16 - Magnetic Effect of Current and Electromagnetic Induction>Exercise 1>Q 12

In a

L - R

growth circuit, inductance and resistance used are

1 H

and

20 Ω

respectively. If at

t = 50

ms

, current in the circuit is

3.165 A

then applied direct current

e m f

is :

Figure shows three regions of magnetic field, each of area A and in each region magnitude of magnetic field decreases at a constant rate α. If E→ is induced electric field then value of line integral ∮E→·dr→ along the given loop is equal to

Important Questions on Magnetic Effect of Current and Electromagnetic Induction

Learn and Prepare for any exam you want !

Figure shows three regions of magnetic field, each of area $A$ and in each region magnitude of magnetic field decreases at a constant rate $α$ . If $\vec{E}$ is induced electric field then value of line integral $\oint \vec{E} \cdot d \vec{r}$ along the given loop is equal to