Question # 1

The average amount of energy transported by a wave per unit area per unit time is termed as

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Wave speed

Wave intensity

Wavelength

Wave amplitude

The most readily fissionable isotope of uranium has atomic mass of

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234

235

236

238

In any fluid the effect of decrease in pressure with the increase in speed in a horizontal pipe is known as

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Bernoulli's effect

Venturi effect

Torriculli's effect

Shift effect

Five joules of work is needed to shift 10 C of charge from one place to another The potential difference between the places is.

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0.5 V

2 V

5 V

10 V

A 100 Hz A.C. is following in A 7 mH inductance What is its reactane.

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0.4 Ohms

4.4 Ohms

7Ohms

44 Ohms

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

If the rate of change of momentum w.r.t Time is zero then

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Momentum is a function of time

Momentums is not conserves

Momentum is constant

The impulse is into he same direction as the momentum

In electromagnetic spectrum X-rays are next to.

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Water waves

Radio waves

ultraviolet waves

Infrared waves

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

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Intensity of incident light

Electric field near the photocathode

Frequency of incident light

Polarization of incident light

A mass accelerates uniformly when the resulting force acting on it.

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is zero

Is constant but not zero

Increases uniformly w.r.t time

Is proportional to the displacement of the mass from a fixed point

A preset or trimmer can be a.

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Variable resistor

Variable capacitor

Variable inductor

All of these

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

the alpha particle does not travel for enough in air.

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Due to its intense ionization

Due to its large mass

Due to its high charge

Due to its Hight Ionization

Which statement about convection is correct.

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Brownian motion is a form of convection

Convection occurs only in gas

Convection results from a density change

Evaporation is a form of convection

The ability of eye to focus near as well as distant object is termed as.

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Myopia

Persistence of vision

Power of accommodation

Astigmatism

Wave motion in air consist of

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Longitudinal waves

Transverse waves

Seismic waves

Polarized waves

The relation between refractive index an critical angle is.

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sin C =1/n

sin n = 1/C

sin c = 1

n = sin C

If the earth stopped rotating the weight of objects at either pole would.

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Be grater

Be less

Vary with altitude

Be the same before

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

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Electrons

Protons

Neutrons

Alpha particles

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

The magnifying power of a convex lens of focal length 5 cm is

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3

5

6

20

The SI unit of density is.

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kg m2

kg m-2

kg m-3

kg m2 s-2

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

Dioptre is the term used for describing the

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Intensity of light

Density of air

Power of light

Refractive index

The charge on a helium nucleus is equal to the charge of.

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Two electrons

Two protons

Two neutrons

One proton

The unit of Rydberg constant R is

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m

m3

m^-1

m-2

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

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2.4 J

4.2 J

12.3 eV

13.6 eV

When X_c = X_l, this condition is called.

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Equality

Balanced

Resonance

Equlibrium

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