Question # 1

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

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Is associated with coil P

Is associated with coil S

Causes an induced current is coil S

All of these

None of these

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

The penetration power ofβ-particle is

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zero

less thanα-particle

equal toα-particle

greater thanα-particle

When a falling body hits ground, its KE changes to _____ energy.

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Potential

Chemical

Mechanical

sound and heat

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

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

The Instantaneous value of alternative current maybe:

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The same as its RMS value

Greater than its Rms value

The same as its peak value

Any of these

None of these

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

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-10 N

+10 N

+20 N

-20 N

A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh^-1. its acceleration will be

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7.71 m s^-2

0.5m s^-2

0.15m s^-2

0.092m s^-2

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

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Adhesive forces

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

The magnification is negative for

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Real image

Virtual image

Sometimes for real sometimes for real

Only for cancave lens

The area of hysteresis loop is an indication of the

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Permeability of the material

Susceptibility of the material

Retentivity of the material

Energy dissipated per cycle

When the movable mirror moves, the distance λ/4 the total path difference would be

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2λ

λ

2λ/4

None of these

Young's modulus for mercury is

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0

2

5

6

Magnetic permeability is maximum for

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Dia-magnetic

Ferromagnetic

Paramagnetic

Non-magnetic

Number of spark plugs needed in diesel engine is:

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Four

Five

Six

None of these

A hole is made in the bottom of a container having water field up to a height h, the velocity of water flowing out of the hole is depend on

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Independent of h

Proportional of h^1/2

Proportional to h

Proportional to h²

Focal length of convex lens is maximum for

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Blue light

Yellow light

Green light

Red light

If a transverse wave has a speed of 10 m/ sec and frequency of 10 cycle/ sec itswavelength is:

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1 m

10^-2 cm

10 m

10 cm

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

None of above

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