Question # 1

The conduction band in a solid

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may be empty

cannot be empty

should be filed

all of them

The product of force and time is called

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acceleration

linear momentum

angular momentum

impulse

A 220 V, 50 Hz. A.C. source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?

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10 A

5 A

33.3 A

3.33 A

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)

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58.8 m/s

49 m/s

65 m/s

19.6 m/s

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

None of these

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

Significant figures in 0.0010 are:

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Four

Three

Two

One

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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3 more neutrons

3 more electrons

3 more protons

3 more ions

Light year is a unit of

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Time

Distance

Velocity

Intensity of light

Rotational kinetic energy of a disc is

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K.E. _rot = 1/2 mV²

K.E. _rot = 1/3 mV²

K.E._rot = 1/4 mV²

None of these

The fibre core has constant refractive index such as

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1.48

1.5

1.52

1.56

J.J Thomson finds:

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Particle nature of the electron

Dual nature of electron

Wave nature of electron

Electromagnetic nature of electron

In carnot cycle, there are isotherms as

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One

Two

Three

Four

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

Who confirm the wave theory of light ?

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Newton

Michelson

Newton

Thomos Young

Distance to nearest galaxy from earth is

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10¹⁰m

10¹⁵m

10⁴⁰m

10³⁰m

If the focal of a convex lens is 5 cm then to get real and inverted image of the same size as that of object, the object should be placed at

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5 cm

10 cm

15 cm

20 cm

According to the Hooke's law the force required to change the length of a wire by '1' is proportional to:

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1^-2

1^-1

1

Pressure may be defined as_____per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

In a compound microscope the intermediate image is

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Virtual erect and magnified

Real,erect and magnified

Virtual,inverted and magnified

Virtual,erect and reduced

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