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Solution for Class 11, Physics, Magnetism Emi

Question 1

Magnetic field lines can be used to determine

the shape of the magnetic field
only the direction of the magnetic field
only the relative strength of the magnetic field
both the direction and the relative strength of magnetic field.

Topic:

Magnetism, EMI & AC

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Question 2

A light bar magnet is suspended near a current-carrying wire as shown below. What will happen to the light ban magnet?

It will rotate clockwise.
It will rotate anti-clockwise.
It will move to the right.
It will move to the left.

Topic:

Magnetism, EMI & AC

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Question 3

The strength of magnetic field due to current carrying loop depends upon

magnitude of current in the loop
number of turns in the loop
distance from the loop
all of these.

Topic:

Magnetism, EMI & AC

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Question 4

The strength of magnetic field due to current carrying loop depends upon

magnitude of current in the loop
number of turns in the loop
distance from the loop
all of these.

Topic:

Magnetism, EMI & AC

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Question 5

egin{array}{ll} ext { Question } 4 & ext { Incorrect }end{array} wedge Medium 335 Which among of these are the main characteristics of fuse element?

High conductivity
Low melting point
Do not burn due to oxidation
All of the above

Topic:

Magnetism, EMI & AC

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Question 6

Question 4 Incorrect Mediumjass Which among of these are the main characteristics of fuse element?

High conductivity
Low melting point
Do not burn due to oxidation
All of the above

Topic:

Magnetism, EMI & AC

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Question 7

Which among of these are the main characteristics of fuse element?

High conductivity
Low melting point
Do not burn due to oxidation
All of the above

Topic:

Magnetism, EMI & AC

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Question 8

Two particles are projected with same velocity but at angles of projection

(45 - θ)

and

(45 + θ)

. Then their horizontal ranges are in the ratio of .

$1 : 2$
$2 : 1$
$1 : 1$
None of the above

Topic:

Magnetism, EMI & AC

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Question 9

Angle of projection

a n^{- 1} (4/3)

$a - f, b - e, e - g, d - h$
$a - g, b - f, c - e, d - f$

Topic:

Magnetism, EMI & AC

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Question 10

A person throws a bottle into a dustbin at the same height as he is

2 m

away at an angle of

4 5^{\circ}

. The velocity of thrown is. egin{array}{lll} ext { 1) } g & ext { 2) } \sqrt{g} & ext { 3) } 2 gend{array}

$2 g$

Topic:

Magnetism, EMI & AC

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Question 11

A body is projected horizontally from the top of a hill with a velocity of

9.8 m / s

. What time elapses before the vertical velocity is twice the horizontal velocity ?

$0.5 sec$
$1 sec$
$2 sec$
$1.5 sec$

Topic:

Magnetism, EMI & AC

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Question 12

3. Solve numarical examples. i) The masses of two bodies are measured to be

15.7 p m 0.2 kg

and

27.3 p m 0.3 kg

. What is the total mass of the two and the error in it?

[

Ans

: 43 kg, p m 0.5 kg]

Topic:

Magnetism, EMI & AC

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Question 13

xi) The length, breadth and thickness of a rectangular sheet of metal are

4.234

m, 1.005 m

, and

2.01 cm

respectively. Give the area and volume of the sheet to correct significant figures. [Ans:

4.255, 8.56 \times 1 0^{- 2}

]

Topic:

Magnetism, EMI & AC

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Question 14

3. Solve the following problems. i) Determine

v ec a \times v ec b

, given

v ec a = 2 \hat{i} + 3 \hat{j}

and

v ec b = 3 \hat{i} + 5 \hat{j}

[

Ans

: \hat{k}]

Topic:

Magnetism, EMI & AC

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Question 15

3. Plot a graph showing the variation of coulomb force

(F)

versus

l e f t (\frac{1}{r ^{2}} i g h t)

, where

r

is the distance between the two charges of each pair of charges :

(1 m u C, 2 m u C)

and

(2 m u C, - 3 m u C)

, interpret the graphs obtained. (AI 2011)

Topic:

Magnetism, EMI & AC

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Question 16

(66) A small conducting, sphere of radius

r

carrying a charge

+ q_{1}

is surrounded by a large concentric condicting shell of radius

R

on which a charge

+ Q

is placed. Using Gausss law derive the expressions for the electric field at a point

x

(i) beiween the sphere and the shell

(r < x < R)

. (ii) outside the spherical shell.

Topic:

Magnetism, EMI & AC

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Question 17

Equivalent resistance between the point

A

and

B

Topic:

Magnetism, EMI & AC

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Question 18

The amplitude of a damped oscillator decreases to

0.9

times its original magnitude is

5 s

. In another

10 s

, it will decrease to

α

times its original magnitude, where

α

equals

q u a d

(2013 Main)

$0.7$
$0.81$
$0.729$
$0.6$

Topic:

Magnetism, EMI & AC

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Question 19

The amplitude of a damped oscillator decreases to

0.9

times its original magnitude is

5 s

. In another

10 s

, it will decrease to

α

times its original magnitude, where

α

equals

q u a d

(2013 Main)

$0.7$
$0.81$
$0.729$
$0.6$

Topic:

Magnetism, EMI & AC

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Question 20

A-6. A player kicks a football at an angle of

4 5^{\circ}

with an initial speed of

20 m / s

. A second playn on the gone Ine

60 m

away in the direction of kick starts running to receive the ball at that instant. Find the ooratari speed of the second player with which he should run to catch the ball before it his fhe grand

l e f t [g = 10 m / s^{2} i g h t]

Section (B) : Projectile from a tower

Topic:

Magnetism, EMI & AC

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Solution for Class 11, Physics, Magnetism Emi

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