Question # 1

A carnot cycle consists of

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One step

two step

three steps

four steps

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

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5N

4N

1.5N

6N

Michael Faraday and Joseph Henry belong respectively to

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USA and England

England and France

England and USA

USA and France

None of these

The value for systolic blood pressure for a normal healthy person is

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140 torr

80 torr

90 torr

120 torr

Truth of kinetic energy is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

In an N-type silicon, which of the following statement is true

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Electrons are majority carriers and trivalent atoms are the dopants

Electrons are minority carriers and pentavalent atoms are the dopants

Holes are minority carriers and pentavalent atoms are the dopants

Holes are majority carriers and trivalent atoms are the dopants

An electric field is generated along the wire when:

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Its resistance is very high

A constant potential is maintained across the wire

Net current through the wire is zero

A constant potential difference is maintained across the wire

Either (A) or (D)

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

If the two charges in Coulomb's law have double distance between them, then electric force

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Becomes two-fold

Becomes four-fold

Remains the same

None of these

The wave form of alternating voltage is the graph between:

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Voltage across X-axis and time across y-axis

Current and time

Voltage along y-axis and time along x-axis

Voltage and current

Either (B) or (D)

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

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Same

2 times

4 times

8 times

In diffraction grating has feature/features like

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A glass plate

A large numbers of lines are ruled

Spacing between two lines acts as a slit

All of these

Which one of the following is polymer

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Polythene

Polystyrene

Nylon

All

Material with smaller hystersis loop area are best for the construction of

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Transformer

Core of transformer

D.C motor

Rectifier

Alexander graham bell transmits a voice message via a

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Beam of light

Telescope

Compound microscope

Mirror

The dimensions of the quantities in one of the following pairs are the same.identify the pairs.

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Torque and work

Angular momentum and work

Energy and Young's modulus

Light year and time

In semiconductor Si or Ge a missing electron in covalent bond from an atom is a

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Charged atom

Hole

Ion

All of them

In normal adjustment, the length of the telescope is

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f_e + f_o

f_o - f_e

f_e - f_o

None of these

At high altitude the blood flows out of nose and ear because

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The blood pressure increases at high altitudes

The percentage of oxygen in the air increases

The atmospheric pressure decreases there

The density of blood decreases at high altitudes

In integers such as 8,000 Kg, significant zeros are determined by the instrument when least count is 1 Kg

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8.00 × 10³ Kg

8.000 × 10³ Kg

8.00 × 10³ Kg

8.0 × 10³ Kg

The mass of electrons in Me V is

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1.02 Mev/C²

0.51 Mev/C²

51 Mev/C²

102 Mev/C²

The approximate efficiency of dry cell battery is

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80%

90%

70%

50%

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