Question # 1

All trigonometric functions (sine, cosine, tangent etc) are positive in:

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

The number of input terminals of an op-amp is:

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One

Two

Three

Four

None of these

A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:

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10 NS

100 NS

140 NS

200 NS

Examples of polymeric substances are:

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Plastic

Synthetic rubbers

Zirconia

All of these

Both (A) and (B)

Computer chips are made from

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Conductors

Semiconductors

Insulators

Both A and B

The SI unit of flux density is

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Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

Tick the series which lies in the visible region:

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Lyman series

Balmer series

Paschen series

Brackett series

P fund series

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s^s)

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9.8 m

14.7 m

4.9 m

19.6 m

A mass of 5kg moves with an acceleration of 10m s^-2force applied is

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10N

50N

2N

20N

Radian is defined as the angle subtended at the center of a circle by an arc of:

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Length equal to its diameter

Length equal to its radius

Any length

None of these

Charles Coulomb measured the force between two charges in

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1860 AD

1890 AD

1874 AD

1871 AD

A cube of metal is given a positive charge Q.For the above system,which of the following statements is true?

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Electric potential at the surface of the cube is zero

Electric potential within the cube is zero

Electric filed is normal to the surface of the cube

Electric field varies within the cube

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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Plasticity

Breaking point

Proportional limit

Strain

If the temperature of the sink is decreased, the efficiency of a Carnot engine

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Decreases

Increases

Remains constant

First increases the decreases

A fly wheel of moment of inertia 500 kgm² is rotating at a angular speed of 6 rad s^-1. What torque is need to stop the wheel in 3 sec ?

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500 Nm

100 Nm

1500 Nm

2000 Nm

Inspite of different dispersion, all the wavelengths arrive at the other end of the fibre at the same time. With a step-index fibre overall time difference may be about

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40 ns

30 ns

32 ns

33 ns

The wavefront formed at very large distance from the source is:

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Cylindrical

Spherical

Elliptical

Plane

The typical speed of human swimming is

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1.5 ms^-1

2 ms^-1

2.5 ms^-1

3.0 ms^-1

The limit up to which the stress is directly proportional to strain is called

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Elastic limit

Proportional limit

Breaking limit

Ultimate tensile limit

Torque producing anticlockwise rotation is taken as

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negative

positive

zero

both negative and positive

In conductors, the valence band and conduction bands are

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Touch each other

Overlapped each other

Largely overlapped

None of these

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