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Class 12 Math Questions asked by Filo students

Question 1

23. The figure shows

v_{m}^{2}

versus

\frac{1}{λ}

graph for photoelectrons emitted from a surface where

v_{m}

is the maximum speed of electrons and

λ

is the wavelength of incident radiation. Using this graph and Einstein's photoelectric equation, obtain the expressín for Planck's constant and work function of the surface. 5

Topic:

Ratio & Proportion

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Question 2

A line, with the slope greater than one, passes through the point

A (4, 3)

and intersects the line

x - y - 2 = 0

at the point

B

. If the length of the line segment

A B

\frac{29}{3}

, then

B

lso lies on the line: [July 25, 2022 (I)]

$2 x + y = 9$

Topic:

Coordinate Geometry

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Question 3

60. In

C^{14}

lsotope the number of neutrons would be?

Topic:

Ratio & Proportion

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Question 4

Doe modern atomic mass unit is based n)

c^{12}

$C^{lt}$
8::

Topic:

Ratio & Proportion

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Question 5

Nitride ion in

Li N

is composed of?

7 protons +7 electrons
$HI$ ::
7 Protons +10 electrons
10 protons +7 protons
10 protons +10 electror

Topic:

Ratio & Proportion

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Question 6

The nucleus of an atom contains

Electrons and protons
Electrons and $β$ -particles
Protons and neutrons
Protons and $γ$ -praticle

Topic:

Ratio & Proportion

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Question 7

The isotopes of neutral atoms of an element differ in?

Atomic number
Mass number
Number of electrons

Topic:

Ratio & Proportion

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Question 8

i5 Two atoms of argon have atomic weights 38 and 40 . The number of electrons (51) 20

Topic:

Ratio & Proportion

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Question 9

Among the isoelectronic species, electrons are relatively more than protons in?

$K^{*}$
$Ca$
$SC^{- 3}$

Topic:

Ratio & Proportion

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Question 10

The mass of one mole of electron is?

$1.008 gr$
0.55 (mg)
$0.184 mg$

Topic:

Ratio & Proportion

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Question 11

Which of the scientist were able to prove that atom is ng longer non-divisible

✓

Dalton

Michael Faraday
Thomson

Topic:

Ratio & Proportion

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Question 12

A loop of irregular shape made of flexible conducting wire carrying clockwise current is placed in uniform inward magnetic field, such that

Experiences force
Develops induced current for a short time
Changes to
All of these mmnopre

Topic:

Euclid's Geometry

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Question 13

convex lens of focal length

20 cm

is split into parts as shown in figure. An ob

$2 mm$
$4 mm$
$2.5 cm$
$6.0 cm$

Topic:

Ratio & Proportion

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Question 14

For the system shown in figure, for what value of

d

image of point object '

O

is formed on object itself

$100 cm$
$20 cm$
$140 cm$
$120 cm$

Topic:

Ratio & Proportion

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Question 15

Region I and II are separated by a spherical surface of radius

25 cm

. An object is kept in region I at a distance of

40 cm

from the surface. The distance of the image from the surface is [JEE (Main)-2021]

$18.23 cm$
$9.52 cm$
$37.58 cm$
$55.44 cm$

Topic:

Ratio & Proportion

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Question 16

A ray of light is incident on a glass sphere at incident, is

β

. What is the angle by which the ray is deviated as 2 and 0.5 . If separation between 25. In lens displacement method lateral magnification lenses is

30 cm

, then focal length of the lens is

$30 cm$
$20 cm$
$15 cm$
$10 cm$

Topic:

Coordinate Geometry

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Question 17

A thin convex lens of focal length

20 cm

is split into parts as shown in figure. An object

O

is placec

10 cm

from the lens. The distance between two virtual images of object will be

$2 mm$
$4 mm$
$2.5 cm$
$6.0 cm$

Topic:

Coordinate Geometry

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Question 18

Two identical charges repel each other with a force equal to 10 mg WT when they are 0.6 m apart in air. The value of each charge is ?

Topic:

Statistics and Probability

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Question 19

An electric current is passed through silver voltameter connected to a water voltameter. The cathode of the silver voltameter weighed

0.108 g

more at the end of the electrolysis. The volume of oxygen evolved at STP is: [Kerala PMT 2003]

$56 cm^{3}$
$550 cm^{3}$
$5.6 cm^{3}$
$11.2 cm^{3}$
$22.4 cm^{3}$

Topic:

Number Systems

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Question 20

( 58. An electric current is passed through silver voltameter connected to a water voltameter. The cathode of the silver voltameter weighed 0.108 g more at the end of the electrolysis. The [Kerala PMT 2003] (d) 11.2 cm³ (c) * 5.6cm volume of oxygen evolved at STP is: (b) 550 cm³ (a) 56 cm 3 (e) 22 4cm 3

Topic:

Ratio & Proportion

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1 2

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Class 12 Math Questions asked by Filo students

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A loop of irregular shape made of flexible conducting wire carrying clockwise current is placed in uniform inward magnetic field, such that