Question # 1

The circuit in which current and voltage are in phase, the power factor is

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zero

1

negative

0.83

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

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Four-fold

One-half

One-fourth

Zero

The chemical behaviour of an atom is determined by

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binding energy

atomic number

mass number

number of isotopes

Which waves are used in sonography?

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Microwaves

Infra red waved

Sound waves

Ultrasonic waves

The first shell near the neucles is

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L-shell

X-shell

N-shell

M-shell

In vibrational motion(SHM)

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P.E remains conserved

Average K.E remain constant

Neither P.E nor K.E remains constant

Total energy remains constant

If the time period a simple pendulum is 2 s, its frequency would be

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2 Hz

1.5 Hz

1.0 Hz

0.5 Hz

Which quantity is important in stating the entropy of the system

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initial entropy

final entropy

change in entropy

none of them

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

The electric field lines start from

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Positive charge

Negative charge

Either A or B

Neutron

An atom

The wave form of alternating voltage is the graph between:

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Voltage across X-axis and time across y-axis

Current and time

Voltage along y-axis and time along x-axis

Voltage and current

Either (B) or (D)

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

For a body executing S. H. M, its

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momentum remains constant

potential energy remains constant

kinetic energy remains constant

total energy remains constant

Gas constant per molecule is called:

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Universal gas constant

Stefen's constant

Boltzmann constant

Gravitation constant

According to Huygen's principle

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light travels in straight line

Light is a transvers wave

Light has dual nature

All points on the primary wave-front are the sources of secondary wavelets

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

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Motion emf

Electrostatic emf

Induced emf

Both A and B

Both A and C

An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically above a point A on the ground, a bomb is released from it. The bomb strikes the ground, at point B. The distance AB is

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1200 m

0.33 km

3.33 km

33 km

A second's pendulum is a pendulum whose time period is

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1 second

2 seconds

3 seconds

4 seconds

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

Transmitting antenna emits

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Magnetic waves

Electric waves

Electromagnetic waves

Sound waves

The weight 'mg' of the bob is resolved into

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one component

two components

three components

four components

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

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Magnetic field

Electrostatic field

Electromagnetic field

All of these

None of these

Which quantity has the same units as impulse

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force

work

linear momentum

acceleration

The vector in space has:

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One component

Two components

Three components

None of these

The photon of radio-waves has energy of about

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1 Me V

1 Ke v

10^-10e v

10¹⁰e v

Pair production take place when energy ofγ-rays photon is

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equal to 1.02 Mev-

greater than 1.02 Mev

less than 1.02 Mev

none of these

Which quantity has different dimension?

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Tension

Work

Energy

Torque

The transition from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

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

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

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