Question # 1

SI unit of impedance is

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hertz

henry

ampere

ohms

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

The value of output resistance of OP-AMOP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several mega ohms

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

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Mutual induction

Mutual inductance

Capacitance

Self inductance

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

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Q/4πr²

2Q/4πr²

Q.d

Zero

Another mean of electric potential energy per unit charge is given by:

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Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

To and fro motion of a body is about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

Referring to above figure, current in the coil P grows from zero to its maximum value

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

At the point of contact of the lens and the glass plate, the Newton's ring is

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dark

bright

either of them

neither of them

The perpendicular distance form the line of action of force to the pivot point is called

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couple arm

angular distance

moment arm

none of them

High temperature superconductors have temperature

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Above 77 K

Below 77 K

At 77 K

None of these

A finite volume of gas consists of molecules

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Very small

Large

Very large

None of these

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre,then the potential at a point distance 15 cm from the centre will be

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1/3 V

2/3 V

3/2 V

3 V

If the unit of length, mass and time each be doubled, the unit of work is increased by

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2 times

6 times

4 times

8 times

Shear modulus for glass is

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23

39

52

69

Moment of inertia of a thin ring or hoop is

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mr²

2/3 mr²

5/6 mr²

1/3 mr²

The product of pressure P and volume V of an ideal gas is

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Constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

On moving a charge of 20 coulombs by 2 cm,2J of work is done,then the potential difference between the points is

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0.1 V

8 V

3 V

0.5 V

In relation Vt = 2gr²ρ/9η. Terminal velocity is directly proportional to

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r

r²

r³

None of these

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