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Government Job Aspirant Questions asked by Filo students

Question 1

(1) Time period of a simple pendulum depends on its length and acceleration due to gravity. Find an expression for time period.

Topic:

Atoms, Nuclei & Dual nature

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Question 2

A rod of mass

M

and length

2 L

is suspended at its middle by a wire. It exhibits torsional oscillations; If two masses each of

m

are attached at distance

L /2

from its centre on both sides, it reduces the oscillation frequency by

20%

. The value of ratio

m / M

is close to :

$0.17$
$0.37$
$0.57$
$0.77$

Topic:

Waves & Oscillation

View 4 solutions

Question 3

A rod of mass

M

and length

2 L

is suspended at its middle by a wire. It exhibits torsional oscillations; If two masses each of

m

are attached at distance L/2 from its centre on both sides, it reduces the oscillation frequency by

20%

. The value of ratio

m / M

is close to :

$0.17$
$0.37$
$0.57$
$0.77$

Topic:

Waves & Oscillation

View solution

Question 4

The output characteristics of a transistor is shown in the figure. When

V_{CE}

10 V

and

I_{C} = 4.0 mA

, then value of eta_{\mathrm{ac}} is

Topic:

Atoms, Nuclei & Dual nature

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Question 5

A block of mass

m

starts from rest and slides down a frictionless semi-circular track from a height

h

as shown. When it reaches the lowest point of the track, it collides with a stationary piece of putty also having mas

; m

. If the block and the putty stick together and continue to slide, the maximum height that at is the block-putty system could reach is

$h /4$
$h /2$
$h$
independent of oldsymbol{i}

Topic:

Mechanics

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Question 6

A block of mass

m

starts from rest and slides down a frictionless semi-circular track from a height

h

as shown. When it reaches the lowest point of the track, it collides with a stationary piece of putty also having mas

; m

. If the block and the putty stick together and continue to slide, the maximum height that the block-putty system could reach is

$h /4$
$h /2$
$h$
independent of $i$

Topic:

Mechanics

View solution

Question 7

X 2 one metallic sphere A is given positive charge whereas another identical metallic sphere

B

of exactly same mass as of

A

is given equal amount of negative charge. Then,

mass of $A$ and mass of $B$ still remain equal
mass of A increases
mass of $B$ decreases
mass of B increases

Topic:

Electrostats

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Question 8

Negative and appears only at the point on the sphere closest 9. When a body is earth connected, electrons from the earth flow into the body. This means the body is

Negative and distributed non-uniformly over the entire
uncharged
charged positively surface of the sphere
charged negatively
an insulator
zero

Topic:

Electrostats

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Question 9

Example

1.3

A sphere of lead of mass

10 g

has net charge

- 2.5 \times 1 0^{- 9} C

. (i) Find the number of excess electrons on the sphere. (i) How many excess electrons are per lead atom? Atomic number of lead is 82 and its atomic mass is

207 g / mol

Topic:

Electrostats

View 13 solutions

Question 10

A uniform chain is placed at rest on a rough surface of base length

l

and height

h

on an irregular as shown. Then, the minimum coefficient of friction between the chain and the surface must be equal to

$m u = \frac{h}{2 e ll}$
$m u = \frac{h}{e ll}$
$m u = \frac{3 h}{2 e ll}$
$m u = \frac{2 h}{3 e ll}$

Topic:

Mechanics

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Question 11

In an arrangement shown below, the acceleration of block

A

B

are

$g /3, g /6$
$g /6, g /3$
$g /2, g /2$
0,0

Topic:

Mechanics

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Question 12

Four identical rods are joined end to end to form a square. The mass of each rod is M. The moment of inertia of the system about an axis passing through the point of intersection of diagonals and perpendicular to the plane of the square is

$\frac{4 M L ^{2}}{3}$
$\frac{13 M L ^{2}}{3}$
$\frac{M L ^{2}}{6}$
$\frac{13 M L ^{2}}{6}$

Topic:

Mechanics

View solution

Question 13

Consider two satellites

S_{1}

and

S_{2}

with periods of revolution

1 hr

. and

8 hr

. respectively revolving around a planet in circular orbits. The ratio of angular velocity of satellite

S_{1}

to the angular velocity of satellite

S_{2}

is :

Topic:

Mechanics

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Question 14

6. When electrons equal to Avogadros number are transfeered from one connductor to another, a potentialdifferenc of

1 0^{6} V

appaears between them. Calculate the capacitance of the system. of two conductors.

Topic:

Electrostats

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Question 15

performance and efficiency of plant. Ex. Air preheater, economizer, superheater, feed pump Example

1.4

Consider the following statements: 1. Boiler mountings are mainly protective devices. 2. Steam stop valve is an accessory. 3. Feed water pump is an accessory. Which of these statements are correct?

1,2 and 3

Topic:

Mechanics

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Question 16

E = M C^{2}

is called

Einstein pohoto electric equation.
Einsteins mass energy relation
Plancks Quantum equation.
Einstuins relativity equation.

Topic:

Waves & Oscillation

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Question 17

43. A person is standing on a truck moving with a constant velocity of

14.7 m / s

on a horizontal road. The man throws a ball in such a way that it returns to the truck after the truck has moved

58.8 m

. Find the speed and the angle of projection (a) as seen from the truck, (b) as seen from the road.

Topic:

Mechanics

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Question 18

Magretic material can be classefied according to their belvauicur is ab follow

Diamagnetia

Topic:

Electrostats

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Question 19

Paramagnetic 3.) Ferramagnetic

Antimagretic Anti feremagnetic

Topic:

Electrostats

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Question 20

14. A person travelling at

43.2 km / h

applies the brake giving a deceleration of

6.0 m / s^{2}

to his scooter. How far will it travel before stopping ?

Topic:

Mechanics

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