Match the following List-I List-II List-III (A) Mango (i) Dolichos lablab (I) Hesperidium (B) Orange (ii) Annona squamosa (II) Aggregate fruit (C) Bean (iii) Citrus sinensis (III) Drupe (D) Custard apple (iv) Mangifera indica (IV) Legume The correct answer is

A B C D ( iv , III ) ( iii , I ) ( i , IV ) ( ii , II )

A B C D ( iii , I ) ( ii , IV ) ( i , III ) ( iv , II )

A B C D ( iv , III ) ( ii , IV ) ( i , II ) ( iii , I )

A B C D ( iii , III ) ( iv , I ) ( ii , II ) ( i , IV )

waves associated with a moving particle under suitable conditions

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Important Questions on Laws of Motion

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

The hilum is a scar on the:

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Placenta and pericarp are both edible portions in:

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Cotyledon of maize grain is called:

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Coconut fruit is a

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

In Raman scattering, Stokes and Antistokes lines respectively represents lines with ______ and ______ wavelength.

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

A mass

M

attached to a horizontal spring executes

S . H . M .

of amplitude

A_{1}

. When the mass

M

passes through its mean position, then a smaller mass

m

is placed over it and both of them move together with amplitude

A_{2}

. The ratio of

(\frac{A_{1}}{A_{2}})

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Match the following

	List-I		List-II		List-III
(A)	Mango	(i)	Dolichos lablab	(I)	Hesperidium
(B)	Orange	(ii)	Annona squamosa	(II)	Aggregate fruit
(C)	Bean	(iii)	Citrus sinensis	(III)	Drupe
(D)	Custard apple	(iv)	Mangifera indica	(IV)	Legume

The correct answer is

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Matter waves are

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

If the uncertainty in the position of an electron is

10^{- 10} m,

then the value of uncertainty in its momentum will be _____

kg {ms}^{- 1} . (h = 6.62 \times 10^{- 34} J^{- s})

HARD

Physics>Mechanics>Laws of Motion>Conservation of Momentum

Four electrons, each of mass

m_{e}

are in a one dimensional box of size

L

. Assume that, the electrons are non-interacting, obey the Pauli exclusion principle and are described by standing De Broglie waves confined within the box. Define

α = \frac{h^{2}}{8 m_{e} L^{2}}

and

U_{0}

to be the ground state energy. Then,

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A body of mass

M

moving with velocity

v

explodes into two equal parts. If one part comes to rest and the other part moves with velocity

v_{0}

; what would be the value of

v_{0}

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A body of mass

3 k g

is moving with a velocity of

4 m s^{- 1}

towards right, collides head-on with a body of mass

4 k g

moving in the opposite direction with a velocity of 3

m s^{- 1}

. After collision the two bodies stick together and move with a common velocity, which is

HARD

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A stone of mass $m$ is tied to an elastic string of negligible mass and spring constant $k$ . The unstretched length of the string is $L$ and has negligible mass. The other end of the string is fixed to a nail at a point $P .$ Initially the stone is at the same level as the point $P$ . The stone is dropped vertically from point $P .$ What shall be the nature of the motion after the stone has reached its lowest point?

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

The ratio of Young's modulus of the material of two wires is

2 : 3

. If same stress is applied on both, then, the ratio of elastic energy stored per unit volume will be

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

The Young's modulus of a wire is $Y$ . If the energy per unit volume is $E$ , then, the strain will be

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

A wire suspended vertically from one of its ends is stretched by attaching a weight of $200 N$ to the lower end. The weight stretches the wire by $1 m m$ . Then the elastic energy stored in the wire -

HARD

Physics>Mechanics>Laws of Motion>Conservation of Momentum

Derive an expression for the elastic potential energy stored in a stretched wire under stress. Define the terms elastic after effect and elastic fatigue.

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

The length of a rod is

20 cm

and area of cross-section

2 {cm}^{2}

. If the Young's modulus of the material of wire is

1.4 \times 10^{11} N m^{- 2}

and the rod is compressed by

5 kg

weight along its length, then, increase in the energy of the rod (in

joules

) will be

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

If on stretching a wire of length

L

and area of cross-section

A

with force

F

, its length changes by

l

, then, the elastic energy stored per unit volume is

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A wire suspended vertically from one of its ends is stretched by attaching a weight of

200 N

to the lower end. The weight stretches the wire by

1 m m

. Then the elastic energy stored in the wire -

Who was the emperor of Japan during the Meiji Restoration?

Important Questions on Laws of Motion

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