Question # 1

In a simple harmonic motion (SHM) which of the following does not hold?

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The force on the particle is maximum at the ends

The acceleration is minimum at the mean position

The potential energy is maximum at the mean position

The kinetic energy is maximum at the mean position.

With the propagation of a longitudinal wave through a material medium the quantities transmitted in the propagation direction are

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Energy momentum and mass

Energy

Energy and mass

Energy and linear momentum

Two electric bulbs of 200 W and 100 W have same voltage.If R1 and R2 be their resistance respectively then

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R₁ = 2R₂

R₂ = 2R₁

R₂ = 4R₁

R₁ = 4R₂

Which of the following is equal to:

joule x ohm / volt x second ?

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Ampere

Volt

Watt

Tesla

There are discrete energy levels in atoms. It was first experimentally demonstrated by

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Rutherford's experiment

Frank Hertz experiment

Marsden's experiment

Sommerfield experiment

A wire is stretched to double of its length.The strain is

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2

1

Zero

0.5

When boron is added as an impurity to silicon the resulting material is

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n type conductor

n type semiconductor

p-type conductor

p-type semiconductor

In case of p-n junction diode at high value of reverse bias the current rises sharply The value of reverse bias is known as

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Cut off voltage

Zener voltage

Inverse voltage

Critical voltage

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

A 2 kg body and a 3 kg body have equal momentum if the kinetic energy of 3 kg body is 10 j, the KE of 2 kg body will be

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6.66 j

15 j

22.5 j

45 j

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

The time period of a simple pendulum is 2 seconds. If its length is increased by 4 times, then its period becomes

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16 s

12 s

8 s

4 s

The peak voltage in 220 volt A.C. supply is nearly

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220 volt

253 volt

311 volt

440 volt

A cable that can support a load W is cut into two equal parts. The maximum load that can be supported by either part is:

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W/4

W/2

W

2W

A man pushes a wall but fails to displace it. He does:

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Negative work

Maximum positive work

Positive work but not maximum

No work

An ideal choked (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

Absolute temperature can be calculated by

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Mean square velocity

Motion of the molecule

Both A and B

None of these

A cable breaks if stretched by more than 2 mm. It is cut into two equal parts. How much either part can be stretched without breaking?

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0.25 m

0.5 m

1 mm

2 mm

Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is

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Zero

5N

25N

150N

In Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If its produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be

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60 x 10^-4cm

10 x 10^-4cm

10 x 10^-5cm

6 x 10^-5cm

How much water a pump of 2kW can raise in one minute to a height of 10 m, take g = 10 m/s²?

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1000 liters

1200 liters

100 liters

2000 liters

What remains constant in the field of central force?

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Potential energy

Kinetic energy

Angular momentum

Linear momentum

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