Question # 1

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The path described by a projectile is called its

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orbit

trajectory

range

distance

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

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Bright

Dark

Any of A and B

None of these

Current is measured in

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volts

watt

ohm

ampere

Most OP-AMP operates with

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+ 6 V supply

+ 10 V supply

+ 12 V supply

+ 24 V supply

When force and displacement are perpendicular to each other than work is equal to

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Unity

Infinity

Zero

-Fd

The pattern of crystalline solid is:

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One dimesional

Two dimensional

Three dimensional

Either (A) or (B)

None of these

The direction of velocity is along the direction of

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distance

displacement

acceleration

all of them

Truth of kinetic energy is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

The number of vibrations in two seconds can be expressed as______if frequency of vibration is f.

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f

2 f

3 f

1/2 f

In closed end organ pipe, the frequency of first harmonic is 300 Hz. The frequency ofthird overtone is :

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900 Hz

1500 Hz

2100 Hz

600 Hz

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively.Which one of the following is true?

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Their range will be same

Their maximum height will be same

Their landing velocity will be same

their time of flight will be same

An object is placed at a distance 18 cm from a convex lens. The image is formed at a distance of 9 cm the focal length of the lens is

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6 cm

9 cm

10 cm

18 cm

A closed organ pipe and an open organ pipe have their first overtones of identicalfrequency. Their respective lengths are in the ratio:

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1 : 2

4 : 3

2 : 3

3 : 5

Such substances which break soon after they cross elastic limit is called

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Weak substance

Ductile substance

Brittle substance

Organic substance

Graham Bell photo phone used a modulated beam of

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Reflected sun light

Refracted sun light

Diffracted sun light

None of these

The acceleration of a motor car is 8 m/s².If the diameter of its wheel be 2 metre,its angular acceleration will be

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8 m/s²

8 radian /s²

16 m/s²

16 radian/s²

Vector A lies in the XY-plane. For what orientation will its components have opposite signs ?

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II-quadrant

III-quadrant

IV-quadrant

a and c

An ideal heat engine can only be 100% efficient if its exhaust temperature is equal to

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0°C

0k

100°C

Temperature of source

An electron of charge e coulomb passes through a potential difference of V volts,its energy in 'joules' will be

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V/e

eV

e/V

V

Which of the following parameter does not characterize the thermodynamic state of matter?

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Work

Pressure

Temperature

Internal energy

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