Question # 1

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

A body with frequency of would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

The potential difference across each resistance in series combination is

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same

different

zero

none of these

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

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Peak value

RMS value

Instantaneous value

Peak-to-peak value

Both (A) and (C0

Lenz's law is the consequence of

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Mass

Energy conservation

Momentum conservation

Charge

A heat engine is that which converts

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mechanical energy into thermal energy

thermal energy into mechanical energy

K.E into potential energy

heat energy into light energy

An L-R circuit has R = 10 Ω and L = 2 H. If 120 V, 60 Hz A.C. voltage is applied, then current in the circuit will be

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0.32 A

0.16 A

0.48 A

0.80 A

Two vectors to be combined have magnitudes of 60 N and 35 N. Pick the possible answer:

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100 N

70 N

20 N

Zero

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

Density of fluid is defined as:

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Its volume to mass ratio

Product of volume and mass

Its mass of volume ratio

None of these

When the object lies between F and 2F the image formed by a convex lens is

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Real

Virtual

Diminished

Erect

Velocity is a physical quantity which is

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Scalar quantity

Vector quantity

Variable quantity

None of these

The conductivities of conductors (metals) have

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10⁵ (Ω)^-1

10⁷ (Ωm)^-1

10⁸ (Ωm)^-1

10⁹ (Ωm)^-1

Distance traveled by a body falling from rest in the first,second and third second is in the ratio of

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1 : 2 : 3

1 : 3 : 5

1 : 4 : 9

None of the above

Two boats moving parallel in a river

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Are pulled towards each other due to less pressure in between them

Get part due to increases in pressure in between them

Remain always parallel as there is no change in pressure

None of these

The angular momentum of a system of particles is not conserved

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When net external force is acting upon the system

When a net external torque is acting upon the system

When a net external impulse is acting upon the system

None of these

The blood flow is laminar at

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Normal blood pressure

Systolic blood pressure

Diastolic blood pressure

High blood presure

The unit cell of the shape of match box is called

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Cubic

Tetragonal

Orthorhombic

Rhomboheral

Finger prints on paper are identified by sprinkling fluorescent powder on it and observing it under

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Sun light

Sodium light

Infrared

UV

The capacitance of a parallel plate capacitor does not depend upon

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Area of plates

Medium between plates

Distance between plates

Metal of the plates

Longitudinal strain can be produced in

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Glass

Water

Honey

Hydrogen gas

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