Free Printable BVS InterSchool Science Olympiad

1.

When a wave enters from one medium to another, which property is not affected ?

a)

Amplitude

b)

Wavelength

c)

Speed

d)

Frequency

2.

The amount of work is maximum when the angle between the direction of the force and displacement is _______ $\degree$ ?

a)

90

b)

45

c)

180

d)

0

3.

If velocity is doubled then ...

a)

Momentum and K.E. remain same

b)

Momentum increases by 4 times and K.E. by 2 times

c)

Momentum increases by 2 times and K.E. by 4 times

d)

Momentum increases by 2 times and K.E. by 2 times

4.

A gas filled balloon possesses what ?

a)

Kinetic Energy

b)

Potential Energy

c)

Just Energy

d)

None of the above

5.

If a force applied to an object is parallel to the ground, and the object moves perpendicular to the ground, the work done will be _______________ .

a)

Positive

b)

Zero

c)

Negative

d)

Maximum

6.

The time period of a simple pendulum depends upon ________ ?

a)

Temperature

b)

Length

c)

Mass of the bob

d)

Amplitude

7.

Which physical quantity is related to the loudness of sound ?

a)

Timbre

b)

Amplitude

c)

Frequency

d)

Wavelength

8.

In 15 days the activity of a sample of radioactive bismuth decreases to 1/8 of it's original activity. Calculate it's half life.

a)

9

b)

5

c)

3

d)

8

9.

Imagine a man weighs his weight in an elevator accelerating downwards with a magnitude equal to the gravitational acceleration. What value will the weighing scale display ?

a)

The scale will be unable to give a steady reading

b)

The mass of the person x gravitational acceleration

c)

9.81

d)

0

10.

2 parallel forces of 500.8 N and 312.4 N act on an object in opposite directions. If it's mass is 50 g, what's the magnitude of the acceleration of the object ?

a)

$3768\ ms^{-2}$

b)

$1400ms^{-2}$

c)

$9420ms^{-2}$

d)

$1626ms^{-2}$

11.

In which of these components is a thermistor used ?

a)

Thermocouple

b)

Bimetallic Thermostat

c)

Thermoreceptors

d)

Digital Thermometer

12.

At what distance should a sheet of paper be placed from the lens of a photocopier ?

a)

At F

b)

Beyond 2F

c)

At 2F

d)

Between F and 2F

13.

Which one of the following is NOT an example of a non ohmic conductor?

a)

Light Bulb

b)

Semiconductor Diode

c)

Thermistor

d)

Silver

14.

Which of these rules can be used to find the direction of force in a DC motor ?

a)

Maxwell's Screw rule

b)

Right Hand grip rule

c)

Fleming's Right hand rule

d)

Fleming's Left hand rule

15.

How many neutrons are present in an alpha particle?

a)

0

b)

4

c)

1

d)

2

16.

Assuming g = $10ms^2$ , and no air resistance, a stone is dropped from rest, what is its speed after 5 seconds ?

a)

0

b)

500 m/s

c)

50 m/s

d)

10 m/s

17.

What form of energy is not dependent on the Sun?

a)

Fossil Fuels

b)

Heat Energy

c)

Solar Energy

d)

Nuclear Energy

18.

Low notes are produced by ______________________ ?

a)

Thin and Slack strings

b)

Long and Slack strings

c)

Short and Thick strings

d)

Long and Tight strings

19.

Random jerky movements of air molecules is called _________ ?

a)

Boyle's Motion

b)

Snell's Motion

c)

Particle Motion

d)

Brownian Motion

20.

What effect does an increase in temperature have on the critical angle of an optical media ?

a)

It decreases

b)

It increases

c)

No light is refracted by a hot substance

d)

No change

21.

Which physicist discovered that a changing magnetic field induces an electric current ?

a)

Michael Faraday

b)

Christian Orsted

c)

Emil Lenz

d)

James Maxwell

22.

The Charles Law relates which two quantities ?

a)

Pressure and Temperature

b)

Pressure and Volume

c)

Volume and Temperature

d)

None of the above

23.

What is the density of a ship ?

a)

$>1000\ kg/m^3$

b)

$>1\ kg/m^3$

c)

$<\ 1g/cm^3$

d)

$>1000\ g/cm^3$

24.

Why is light neutral in terms of charge ?

a)

Because of Destructive interference

b)

Because it's Magnetic and Electric fields act parallel but opposite in direction

c)

Because it's Magnetic and Electric fields act at 90 degrees to each other

d)

Because light is a wave

25.

Coulomb's Law relates which quantities ?

a)

Charge, Energy and Distance

b)

Force, Charge and Time

c)

Current, Charge and Time

d)

Force, Charge and Distance

26.

The resistance of the LDR is 9000 $\Omega$ . Calculate the total resistance of the circuit.

a)

$1300\ \Omega$

b)

$2000\ \Omega$

c)

$1500\ \Omega$

d)

$1250\ \Omega$

27.

Calculate the total number of kilowatt-hours (kW h) of energy supplied to the circuit in 1.0 hour

a)

0.20 kWh

b)

0.51 kWh

c)

0.60 kWh

d)

0.45 kWh

28.

Calculate the energy needed to heat 1000 kg of water from 20 °C to 100 °C.

a)

$3.6\times10^7\ J$

b)

$3.4\times10^8\ J$

c)

$2.8\times10^6\ J$

d)

$3.4\times10^5\ J$

29.

At the point where the light enters the glass, the angle of refraction is r. Calculate r and critical angle c.

a)

$35^o\ and\ \ \ 40^o$

b)

$37^o\ and\ \ \ 39^o$

c)

$33^o\ and\ \ \ 39^o$

d)

$39^o\ and\ \ \ 33^o$

30.

What is the pressure of the gas ?

a)

$p_0-h\rho g$

b)

$p_0+h\rho g$

c)

$p_0$

d)

$h\rho g$

31.

When is the p.d. across the LDR equal to 2.0 V ?

a)

In a cold room with dim light

b)

In a warm room with dim light

c)

In a cold room with bright light

d)

In a warm room with bright light

32.

What is the volume of the air bubble at the surface of the lake ?

a)

$0.20\ cm^3$

b)

$2.40\ cm^3$

c)

$0.60\ cm^3$

d)

$1.80\ cm^3$

33.

What is the change in the output voltage ?

a)

- 3.0 V

b)

+ 2.0 V

c)

- 2.0 V

d)

+ 3.0 V

34.

Which option describes the signal from the generator and its amplitude ?

a)

A.C. & 6

b)

D.C. & 3

c)

A.C. & 3

d)

D.C. & 6

35.

Calculate the resistance between the two opposite faces A and B of the cube.

a)

$3.6\times10^{-4}\ \Omega$

b)

$2.4\times10^{-5}\ \Omega$

c)

$1.2\times10^{-3}\ \Omega$

d)

$4.8\times10^{-5}\ \Omega$

36.

The weight of a person on Earth is 600 N. What will be there weight on the Moon? (Take Earth's g as 9.8 m/s^2 and the Moon's g as 1.6 m/s^2)

a)

96 N

b)

960 N

c)

98 N

d)

60 N

37.

By adding an impurity to a pure substance, what happens to the melting point of the pure substance ?

a)

No effect

b)

Raises the melting point

c)

Lowers the melting point

d)

None of the above

38.

What is the moment arm ?

a)

Parallel distance between pivot and line of action of force.

b)

Distance between two forces acting in different directions

c)

Perpendicular distance between pivot and line of action of force

d)

Distance between two forces acting in the same direction

39.

What property of iron makes it a suitable material to be used in transformers ?

a)

Its density

b)

Its permeability

c)

Its softness

d)

Its electrical conductivity

40.

A neutral atom (atomic number: 56, mass number: 137) is formed by beta decay of a radioactive element atom, which in turn came from alpha decay of another radioactive element atom. What is the atomic number and mass number of the original radioactive element atom ?

a)

56 and 141

b)

57 and 139

c)

56 and 139

d)

57 and 131

41.

A person walks 5 km due East of his current position. He then turns 180^odegrees and walks for 3 miles. Where is he now (assuming that his speed was uniform throughout the journey) ?

a)

At his starting position

b)

Approx. 200 m to the right of his starting position

c)

Approx. 200 m to the left of his starting position

d)

In the middle of the way

42.

When using optical fiber in data transmission, the angle of incidence of the light source on the glass fiber should be ___________.

a)

Greater than critical angle

b)

Less than angle of refraction

c)

Greater than angle of refraction

d)

Less than critical angle

43.

If a force of 8N is acting North-West, while another force is acting 6N North-East, what is the magnitude of the resultant force ?

a)

8 N

b)

7 N

c)

10 N

d)

6 N

44.

A transformer has 200 turns in its primary coil, and 1200 turns in its secondary, provided a voltage of 120 volts, what will be the output voltage of the transformer ?

a)

720 V

b)

120 V

c)

24000 V

d)

20 V

45.

A hydraulic press has a small piston of area 0.025 A hydraulic press has a small piston of area 0.025 $m^2$ on which a force of 15 N is applied. The larger piston has an area of 0.5 $m^2$ What will be the force on the large piston ?

a)

7.5 N

b)

30 N

c)

600 N

d)

300 N

46.

What happens to the boiling point of a pure substance, when an impurity is added to it ?

a)

Decreases

b)

Remains the same

c)

Increases

d)

None of the above

47.

There are 4 fundamental forces of nature. Which of these holds the protons inside the nucleus together ?

a)

Weak Nuclear Force

b)

Electromagnetic Force

c)

Gravitational Force

d)

Strong Nuclear Force

48.

Which of the following statements is true regarding a rider in a roller coaster cart moving with a constant speed through a loop ?

a)

The rider is accelerating

b)

Two forces are acting on the rider, but neither of them are doing any work on the rider

c)

The only force working on the rider is Gravity

d)

The net force is 0(zero)

49.

Which instrument is used to measure atmospheric pressure ?

a)

Aerometer

b)

Anemometer

c)

Barometer

d)

Manometer

50.

What is the magnitude of output received from a machine that has an efficiency of 66% and is given an input of 33 J ?

a)

45

b)

36

c)

19

d)

22

BVS InterSchool Science Olympiad - Schrödinger's Web Quiz 1

Total questions: 50

Worksheet time: 16mins

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