Question # 1

The force exerted perpendicularly on unit of area of an object is called:& nbsp

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strain

young's modulus

pressure

buoyant force

Acceleration is produced by 20 N force it is due to:

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Inertia

Force

Momentum

None

The unit of kinetic energy is:

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J

N

Km

Pa

The type of hydrometer which is used to measure the concentration of acid in a battery is called:

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Chemical meter

Acid meter

Barometer

pH meter

Which pair of physical quantities has same SI unit?

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energy , power

power , work

energy , work

work , momentum

The radius R of the earth is:

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6 x 10¹⁸m

6.4 x 10⁶m

6.4 x 10⁸m

6.4 x 10¹²m

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

In large building central heating system worms on the principle of

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conduction

convection

radiation

waves

Mercury is denser than water by time:

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13,6

10

15

20

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

Parallel forces are those whose:

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^{Times of action are parallel}

Points of action are different

More than one forces

All of the given option

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

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

The digits used in electronics are:

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1

0

0 and 1

1 and 2

Transformer Works on the principle of:

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Self induction

Mutual induction

Electro statatic

Induction

The speed of light in water is:

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2.0x10³ ms^-1

2.5x10³ ms^-1

2.3x10⁸ ms^-1

2.3x10^-8 ms^-1

The value of acceleration in simple harmonic motion at mean position is

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Maximum

Zero

10 N

Both a , b

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

The converter of digital to analogue signal is:

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ADC

DAC

DATC

DTC

The device which is used to convert sound waves into electrical signal is called:

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Ear piece

Microphone

Transmission channel

Receiver

the current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

A changing electric flux creates.

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Electric fields

Gravitational

Magnetic field

Electric charge

When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be.

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Photoelectric effect

Compton effect

Pair production

Annihilation of matter

The magnitude of back emf:

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Increases with sped of motor

Decreases with speed of motor

Remains same

None of above

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm

The winding of the electromagnet in motor are usually called.

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Magnetic coils

Field coils

Electric coils

electric o electric coils

Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be.

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Positively charged

Negatively charged

Electrically neutral

Positively and negatively charged

Which one is not present in A.C. generator.

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Armature

Magnet

Slip rings

Commutator

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

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