Question # 1

the dilation of time applies to the timing processes which are:

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Physical

Chemical

Biological

All of these

None of these

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

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Two

1/2

Zero

3/2

The value of E₀in coulomb's law is:

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9 x 10⁹Nm²C^-2

8.85 x 10^-12C²N^-1m^-2

8.85 x 10^-12Nm²C^-2

9 x 10⁹C²N^-1m^-2

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Addition of 2.189 kg, 0.089 kg, 11.8 kg, and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

In describing function of digital systems, 1 represents:

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Closed switch

True Statement

Lighted bulb

Only (B) and (C)

All are true

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

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pair production

photoelectric effect

Compton effect

None of these

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

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Is associated with coil P

Is associated with coil S

Causes an induced current is coil S

All of these

None of these

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

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F=IB/L

F= L x B/I

F = IL x B

F = IL . B

A typical four stroke petrol engine undergoes how many successive processes in each cycle

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one

two

three

four

The temperature of igneous rocks is about

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100 ^oC

200 ^oC

250 ^oC

270 ^oC

Torque will be zero if

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body is at rest

rotating with uniform angular velocity

zero angular acceleration

all of them

Is Boyle's law is applicable, to the isothermal process

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No

Yes

Some what applicable

None of these

Electromagnetic waves emitted by hot bodies are called:

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Photoelectrons

Alpha rats

Thermal radiation

None of these

The mass of fuel consumed by a typical rocket to overcome earths gravity is

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1000 kgs^-1

100 kgs^-1

10000 kgs^-1

10 kgs^-1

Internal friction of fluid is

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Resistance

Viscosity

Cohesive force

Surface tension

The term impulse means, the force applied on a body for

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Permanently

Temporary

Very short interval of time

None of these

Which of the following is not the unit of time

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Leap year

Lunar month

Solar day

Parallactic second

No work is done by the body when angle between force and displacement is

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0^o

45^o

90^o

60^o

Critical angle of light passing from glass to air is minimum for

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Red

Green

Yellow

Violet

The first superconductor was discovered by

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Fermi

Kmaerlinghormes

Weinberg

None of these

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