Question # 1

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

Slope of velocity-time graph represents:

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Acceleration

Speed

Torque

Work

Good absorbers of heat are

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Poor emitters

Non emitters

Good emitters

Highly polarized

Aluminum is a:

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Good insulator

Bad conductor

Both (A) and (B)

Excellent conductor

Semiconductor

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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10 KJ

5 KJ

2 KJ

1 KJ

A digital system deals with quantities or variables which have

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only one state

only two discrete states

three discrete states

four discrete states

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

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Decreases

Increases

No change

May increase or decresase

Which are not the elementary particles?

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Photons

Leptons

Hadrons

Quarks

None of these

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

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2.120°A

0.212°A

21.2°A

0.14°

a

An angle of 180° in circular motion is equivalent to ______ in SHM.

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Half the vibration

One vibration

3/4th of a vibration

None of these

If F=0.04 N and X=4 cm then K=

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1 Nm^-1

2 Nm^-1

3 Nm^-1

4 Nm^-1

How many electrons are in one Coulomb ?

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6.2 × 10^-23

6.2 × 10^-21

1.6 × 10^-19

Zero

Coulomb's force is also

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Single force

Mutual force

Self force

None of these

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15 m is

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9 x 10⁵ V

9 V

8 x 10⁶ V

80 V

Iron, cobalt and nickle are examples of

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

Thermodynamics is the branch of physics deals with the conversion of heat energy into

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Electrical energy

Mechanical energy

Solar energy

None of these

For all the irreversible processes the entropy of the system

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Increases

Decreases

Remains constant

None of these

The escape velocity of Earth in Kms^-1

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9.75

11.2

12.3

15.6

The Dimension of Force is

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[MLT^-2]

[MLT²]

[ML²T^-2]

None of these

Average acceleration is the difference of two vectors divided by a scalarΔt. Therefore

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Is there any physical distinction between the valence and conduction band

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Yes

No

Very small

None of these

Steradian is an angle of

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One dimensional angle

Two dimensional angle

Three dimensional angle

None of these

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