Question # 1

Heat form one of a metal rod a reaches to the other by the process of

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convection

radiation

conduction

both (a) and (b)

1 hp is equal to :

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747 W

746 W

748 W

1000 W

A Student claimed the diameter of a wire as 1.032 cm using vernier callipers. Upto what extent do your agree with it

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1 cm

1.0 cm

1.03 cm

1.032 cm

A force of 10 N is making an angle of 30o with the horizontal. Its horizontal component will be

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4N

5N

7N

8.7N

While rounding the numbers if last digit is 5, then.

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It is simply dropped

The digit on its left is increased by 1

It is rounded to get nerarest even number

It remain same.

Clockwise torque is taken:

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Positive

Negative

Neutral

Nil

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

The orbital speed of a low orbit satellite is:

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Zero

8 ms^-1

800 ms^-1

8000 ms^-1

The quantities that are completely decribed by only magnitude are.

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vector

Scalar

Base

Derived

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

If base of a right angle triangle is 3 cm and perpendicular is 2 cm. What is tanθ

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0.7

1.5

2

3

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

If the mass of a spring mass system is doubled, its time period becomes:

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√2 T

T/2

√T/2

T/√2

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly__________ to the wavelength of the wave:

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Two times

Equal

Four times

None of these

If there is no extension in the spring then the position is called:

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Equilibrium position

unequilibrium

neutral equilibrium

stable equilibrium

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

Those quantities whose values change gradually or stay constant are called:

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Physical quantities

Digital quantities

Log quantities

Analog quantities

The value of K in SI unit is:

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9X10²⁰ Nm²C²

8X10⁹Nm²C²

9X10⁹Nm²C²

10X10^-9 Nm²C^-2

From which of the following we can get information almost about everything:

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Book

Teacher

Computer

Internet

Coaxial cable are used to transmit signals:

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Magnet

Electric

Mechanical

Both mechanical and magnet

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

The mass of a body is quantitative measure of its

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Motion

Inertia

Weight

All of these

The work done is isochoric process is.

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Constant

Variable

Zero

Depend upon condition

The Carnot cycle can be shown by which graph

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P - T graph

P - V Graph

V- T graph

PV -T graph

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

The central region of a transistor is called.

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Emitter

Collector

Base

Neutral

The 1^st Bohr atom in the hydrogen atom has radius

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3.56 x 10^-10 m

0.053 x 10^-11 m

0.53 x 10^-11 m

5.30 x 10^-11 m

Power dissipation is a pure inductive or in a pure capacitance circuit is:

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10⁶

0

10^∘

Maximum

Curie temperature is a point where :

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Diamagnetism changes to paramagnetism

Paramagnetism changes to Diamagnetism

Ferromagnetism changes to paramagnetism

Paramagnetism changes to Ferromagnetism

The binding energy per nucleon is maximum for

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Helium

Iron

Potassium

Radium

In D.C. generator, split rings act as.

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Capacitor

Commutator

Resistor

Inductor

If I_o is the peak value of current, then its root mean square value is given by

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2 I_o

I_o

0.7 I_o

Number of Isotopes of Neon gas are

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2

3

4

1

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

Life time of metastable states is

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10^-6 sec or more

10^-3 sec or more

10^-5 sec or more

None of these