Question # 1

The nuclei of an element having the same charge number but different mass numbers are called:

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Isobars

Isotopes

Isomers

Isobaric

Isothermal

Lead, copper and wrought iron are examples of

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brittle substances

ductile substances

plastic substances

elastic substances

The ratio of the size of the image to that of object is called:

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Focal length

Aperture

Linear magnification

Principal axis

Density is defined as:

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Mass per volume

Volume per mass

Mass X volume

Mass per length

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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11.0 ohm

1.0 ohm

7.0 ohm

3.0 ohm

Which of the following represents an electric current?

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C^-1

CS^-1

J.S^-1

dynes^-1

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

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heat capacity

specific heat capacity

molar specific heat

molar specific heat at constant volume

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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element

daughter element

parent element

none of these

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm². Find the Young's modulus for that rubber.

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0.5 N cm^-2

0.05 N cm^-2

50 N cm^-2

500 N cm^-2

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1750 Nm^-2

1980 Nm^-2

1975 Nm^-2

1999 Nm^-2

Which does not show polarization?

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Longitudinal waves in gas

Transverse wave in gas

Both A and B

None of these

In an 𝑎 −decay:

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The parent and daughter nuclei have same number of protons

The daughter nucleus has one proton more than parent nucleus

The daughter nucleus has two protons less than parent nucleus

The daughter nucleus has two neutrons more than parent nucleus

All real heat engines are less efficient than carnot engine due to

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Work substances

Friction

0 K

All of these

In time of flight, the body the covers the distance

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Maximum

Zero

Minimum

None of these

The relative velocity of a particle moving with velocity V with respect to itself is

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Zero

V

-V

None of these

The dimensions of intensity of energy are

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MLT⁺²⁷T¹

MLT²T²

ML³

MLT^-2T³

Which type of optical fiber has the largest diameter

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Single mode step index fiber

Multi-mode step index fiber

Multi-mode graded index fiber

None of these

Angular magnification of a simple microscope is given as

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The horizontal component of a force at an angle 60° with it is 50N. The value of force is

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43.3 N

50 N

100 N

120 N

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