Question # 1

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

The A.M. transmission frequency range from

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500-1000 KHz

540-1600 KHz

300-490 KHz

900-2040 KHz

The phase at the positive peak is

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Π/2

Π

3Π/2

2Π

The value of the metastable state for Neon is

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20.66eV

20.61eV

19.23eV

18.70eV

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

The resistance of the given conductor can be increased by

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Increasing the area

Changing resistivity

Decreasing the length

None of the above because change does not matter because in any case the volume remains the same

An emf is set up in a conductor when it:

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Is kept in a magnetic field

Is kept in an electric field

Moves across a magnetic field

Both A and B

None of these

Einstein's theory about gravity if better than Newton's because it gave explanation of:

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Inverse square law

Bending of light

Both A and B

None of above

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

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KHz

MHz

GHz

BHz

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

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Charge Q

Potential V

Capacity

Energy U

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

Two forces of 4 dyne and 3 dyne act upon a body.The resultant force on the body can only be

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Between 3 and 4 dyne

Between 1 and 7 dyne

More than 3 dyne

More than 4 dyne

Inverting amplifier circuits have

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A very high input impendance

A very low input impendance

A low output impendance

Both A and C

When light travels from one medium to another which are separated by a sharp boundary the characteristic which does not change is

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Velocity

Wavelength

Frequency

Amplitude

The property of bending of light around the obstacle is known is

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Interference

Polarization

Diffraction

None of these

Bulk modulus for bass is

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20

41

61

81

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

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125 K

25 K

263 K

163 K

A body is floating in a liquid the up thrust on the body is

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Equal to weight of liquid displaced

Zero

Less than the weight of liquid displaced

Weight of body-weight of liquid displaced

A monkey sits on the pan of spring scale kept in an elevator.The reading of the spring scale will be maximum when

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Elevator is stationary

Elevator cable break and it falls freely towards earth

Elevator accelerates downwards

Elevator accelerates upwards

The ratio of the numerical values of the average velocity and average speed of a body is always.

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Unity

Unity or less

Unity or more

Less than unity

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

Multimode step index fibre has a core of relatively larger diameter such is

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125 μm

175 μm

50 μm

100 μm

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