Question # 1

Newton's law of motion do not hold in

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an accelerated frame of reference

an unaccelerated frame of reference

both of these

none of these

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

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dead beat galvanometer

stable galvanometer

shunt galvanometer

sensitive galvanomter

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 kg

3 kg

4 kg

8 kg

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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parabola

straight line

hyper bola

ellipse

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

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different values

same values

zero valves

constant valves

If F=0.04 N and X=4 cm then K=

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1 Nm^-1

2 Nm^-1

3 Nm^-1

4 Nm^-1

The electric lines of force are

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Imaginary

Physically existing everywhere

Physically existing near the charge

All of the above

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

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0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

The Dimension of acceleration is

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[L²T]

[LT²]

[LT^-2]

None of these

The resultant of two forces.one double the other in magnitude,is perpendicular to the smaller of the two forces.The angle between the two forces is

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120°

60°

90°

150°

In an astronomical telescope the eye piece has the focal length f_e if

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Short

Long

Extremely long

None of these

At high altitude the blood oozes out of the nose and ear because

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The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decreases

The density of blood decrease at high altitudes

Electromagnetic waves transport:

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Energy only

Momentum

Both A and B are correct

None is correct

Newton's rings are:

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Rectangular

spherical

Concetric circles

None of these

Multimode step index fibre is useful for

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short distance

long distance

both a and b

none of them

Young's modulus for steel is

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100

200

300

400

Metals are good conductors of electricity and their conductivities are of the order of

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10³(Ω m)^-1

10⁴(Ω m)^-1

10⁶(Ω m)^-1

10⁷(Ω m)^-1

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest path in 15 minutes.The velocity of the river in km/s is:

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1

3

4

√41

Ordinary light has components of vibrations in

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one direction only

two directions

four directions

all directions

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