Question # 1

A simple pendulum consists of a

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small light bob

small heavy bob

big light bob

big heavy bob

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

A non-inertial frame of reference is one, in which

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law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

The charge carries in the electrolyte are:

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Positive ions

Negative ions

Either (A) or (B)

Both (A) and (B)

Neither (A) nor (B)

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

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decrease

remains the same

increase

any one of them

The waveform of alternating voltage is a:

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Square

Rectangular

Saw-tooth

Sinusoidal

None of these

Magnetic effect at a point caused due to flow a current depend upon the

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Quantity of current

Distance from current

Both the quantity of current and distance from current element

None of the all

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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nuclear fission

nuclear fusion

man defect

radioactivity

How much time, theα-particle more massive than an electron

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600

7000

5000

15000

The example of mechanical wave is

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waves in ropes

waves on water surface

waves in air

all of them

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

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Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

The time of flight of a projectile motion equal to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The wave form of alternating voltage is the graph between:

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Voltage across X-axis and time across y-axis

Current and time

Voltage along y-axis and time along x-axis

Voltage and current

Either (B) or (D)

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

The bicycle pump provides a good example of

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first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

none of them

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

The force applied on unit area to produce any change in the shape, volume or length of a body is known as

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strain

elasticity

stretching

stress

Neutrons are

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positive charge

negatively charged

massless

neutral

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

When the surfaces are coated with a lubricant, then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

When the speed of a body in a fluid increases then the drag force

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decreases

becomes zero

increases

non of them

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