Question # 1

In a three phase a.c generator if the first coil has a phase 0, then the other two coils will have phases

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90° - 120°

20° and 140°

120° and 240°

120° and 140°

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

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60 W bulb

100 W bulb

Both equally

None of these

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

Practically the quantity v/c is always:

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less than one

Equal to one

Greater then one

all of these

None of these

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

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64 W

80 W

100 W

125 W

If electric and gravitational force on an electron in a uniform electric field will be

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E=mg/q

E=q/mg

E=,g/q

E=qg/m

If 250V is the RMS value of alternative voltage, then its peak value V_owill be:

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353.5V

250V

175V

zero

400V

The branch of physics which deals with the structure and properties of solids is called:

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Plasma physics

Solid state physics

Any of above

Astrophysics

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

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W=Kx_o

W=1/2Kx_o

W=1/2Kx²_o

W=4Kx_o

The vast majority of solids are in the form of

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amorphous structure

polymeric structure

crystalline structure

all of them

A digital system deals with quantities which has discrete values:

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Two in number

1890

1930

1895

1911

Two equal forces (P each) act at a point inclined to each other at an angle of 120°.The magnitude of their resultant is

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P/2

P/4

P

2P

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