Question # 1

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

For a parallel resonant circuit at resonance, current from supply is

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minimum

maximum

zero

none of these

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

0.0001210 has ____________ significant figures.

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Four

Three

Seven

Eight

Viscosity is defined as

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the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

The basic circuit element in D.C. circuit is:

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A capacitor

A resistor

An inductor

Both (A) and (C)

Both (A) and (B)

The practical application of the phenomenon of Mutual induction is

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Transformers

Generator

Motor

All of these

The heat required to raise the temperature of one mole of the substance through 1 K is called

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heat capacity

specific heat capacity

molar specific heat

all of them

There is no way to detect:

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Absolute uniform motion

Accelerated motion

State rest

State of motion

None of these

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

The method by which only one half of A.C cycle is converted into direct current is called

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half wave amplification

half wave rectification

Full wave rectification

full wave amplification

The maximum range of the projectile is the horizontal distance covered is

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Maximum

Distance

Minimum

None of these

The product of mass flow per second with velocity is

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Momentum

Acceleration

Force

Displacement

A motor runs at 20 rev/s and supplies a torque of 75Nm. Power delivered by it is

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6.12 hp

12.6 hp

7.3 hp

8.3 hp

A capacitor of capacity 1 μF is charged to 1 kV.The energy stored in J

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5

0.5

0.005

50

A circular scale is attached and graduated in

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One degree

2 degrees

Half degree

None of these

The frequency of the fundamental mode of open at one organ pipe is 400 Hz. Ifone end of pipe is closed the fundamental frequency will be

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800 Hz

600 Hz

400 Hz

200 Hz

A fly wheel of moment of inertia 500 kgm² is rotating at a angular speed of 6 rad s^-1. What torque is need to stop the wheel in 3 sec ?

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500 Nm

100 Nm

1500 Nm

2000 Nm

In photoelectric effect, electrons are emitted with:

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Same energy

Different energies

Both (a) & (b)

Intermittent energies

A particle of mass 0.5 g moving along x-axis is located at x₁= 15 m at t₁=5 s and x₂=33 m at t₂=13 s. Its average velocity is

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6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

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