Question # 1

For a n-p-n transistor, the conventional current equation can be written as

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I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

A heavily damped system has a fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

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dead beat galvanometer

stable galvanometer

shunt galvanometer

sensitive galvanomter

The earth's potential is taken as

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Negative

Positive

Zero

Infinite

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

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1 MeV

2 MeV

4 MeV

8 MeV

The current produced by moving a loop of wire across a magnetic field is called

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Direct current

Magnetic current

Alternating current

Induced current

None of these

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

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Zero

0.5Ω

1.1Ω

5.0Ω

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

Fluids can transmit:

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Transverse wave

Compressional wave

Both of them

None of them

Acceleration means the speed of the body is

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Increasing

Decreasing

Just stop

None of these

The dimensions [MLT^-1] refers to the quantity

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Momentum

Angular frequency

Angular displacement

Angular acceleration

In the equation PV^γ= constant, the valueγof is unity then the process is

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Isothermal

Adiabatic

Isobaric

Irreversible

The final image obtained by astronomical telescope is

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Inverted w.r.t object

Magnified

Virtual

All of them

A non-conducting semiconductor diode is:

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Forward biased

Poorly biased

Reverse biased

None of them

When light passes through a tourmaline crystal, it becomes

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plane polarized

directly polarized

un-polarized

spherically polarized

An artificial satellite travels in a circular orbit about the Earth. Its rocket engine is then fired and produces a force on the satellite exactly equal and opposite to that exerted by the Earth gravitational field. The satellite would then start to move

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A long a spiral path towards the Earths surface

A long the line joining it to the centre of the Earth (i.e radially)

A long a tangent to the orbit

In a circular orbit with a longer period

Shear modulus for bone is

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15

40

50

80

A substance containing equal no. of opposite charges separated by a small distance is known as

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Super conductor

LED

Dipole

Insulator

The maximum drag force on a falling sphere is 9.8 N, its weight is

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1 N

9.8 N

4.9 N

None of these

When an atom is isolated, it energy levels are

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Distinct

Very close

Very very close

None of these

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