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Worksheets

12 Physics

Total questions: 33

Worksheet time: 22mins

Name
Class
Date
1.

Solar cell operates on the principle of 

a)

diffusion     

b)

recombination

c)

photovoltaic action

d)

carrier flow

2.

Co -efficient of performance of a Carnot engine depends on

a)

hot reservoir

b)

cold reservoir

c)

difference between (A) and (B)

d)

heat

3.

Particle nature of radiation is observed in -------.

a)

interference

b)

Photoelectric effect

c)

Compton effect

d)

Diffraction

4.

What would be the diameter of a water droplet, if the excess pressure inside it is 50 N/m2?

a)

2.9 x 10-3 mm

b)

2.9 mm

c)

7.6 mm

d)

5.8 mm

5.
The first law of thermodynamics is a restatement of the
a)
Zeroth law of thermodynamics
b)
law of heat addition
c)
principle of entropy
d)
conservation of energy
6.

Process B on the PV diagram is an ______________ process.

a)

adiabatic

b)

isobaric

c)

isochoric

d)

isothermal

7.

1 The minimum energy required by an electron to just eject from the metal surface so as to overcome the restraining forces at the surface is called ……………..

(a)  

8.

3. The maximum kinetic energy of emitted photoelectrons depends on the ………..and nature of …………but is independent of………..

(a)  

9.

8. The momentum of a photon of energy E is………. and of wavelength is……

(a)  

10.

7. The intensity of light depends upon the… (a)   …present in light.

11.

A particle of light is called a...

a)

Photoelectron

b)

Photon

c)

Proton

d)

Electron

12.

The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

a)

Intensity

b)

Wavelength

c)

Frequency

d)

Energy

13.
This image is an illustration of
a)
photoelectric effect
b)
Dalton's atomic theory
c)
Bohr model
d)
Quantum mechanical model
14.
Which statement about the photoelectric effect is correct?
a)
Electrons are emitted instantaneously.
b)
Electrons are not emitted below a certain wavelength.
c)
You can change the energy of the electrons by changing the intensity.
d)
Electron energy is independent of frequency.
15.

Which experimental setup helped De broglie to prove the hypothesis?

a)

Bose-Einstein experiment

b)

Davisson–Germer experiment

c)

Plank-Maxwell experiment

d)

Bohr-Rutherford experiment

16.

When a person swims under water, water pressure is felt acting on the person's eardrums. The pressure is due to

a)

Less water above the person

b)

Large surface area of the swimmer

c)

Weight of the water above the person

d)

Volume of water

17.
What is the unit of measurement for pressure?
a)
pascal
b)
grams
c)
milliters
d)
meters
18.
What decreases as you go up in the atmosphere?
a)
Altitude
b)
Atmosphere
c)
Meteors
d)
Air Pressure
19.
Where would you find the largest pressure?
a)
At the bottom of the ocean
b)
At the top of Mt Everest
c)
Close to ground on the Scotch oval
d)
In a rockpool on the Great Barrier Reef
20.

What is pressure?

a)

Somebody convincing you to jump into a pool.

b)

How deep a well is.

c)

Amount of force applied to a given area.

d)

Amount of water in a cup of water.

21.

To find the pressure on an object you need to calculate:

a)

pressure = F/A

b)

pressure = A/F

c)

pressure = F x A

d)

pressure = A x F

22.
An instrument used to measure atmospheric pressure.
a)
barometer
b)
pressure meter
c)
atomizer
d)
thermometer
23.
According to Bernoulli's Principle, when the wind speed is high, wind pressure is ________
a)
high
b)
low
c)
not enough information
d)
None of the above
24.
Why is the top of an airplane wing curved?
a)
To create an area of low pressure above the wing
b)
To create an area of high pressure above the wing
c)
To create equal pressure above and below the wing
d)
To make the wing look really cool
25.

What is the best depiction of Bernoulli's principle below?

a)

As the pressure of a fluid decreases, the speed increases

b)

As the pressure of a fluid increases, the speed increases

c)

As the pressure of a fluid decreases, the speed decreases

26.
Name this electronic component
a)
Capacitor
b)
Fixed Resistor
c)
Potentiometer
d)
Transistor
27.

LED is

a)

Light Enhancing Diode

b)

Light Emitting Diode

c)

Light Emitting Detector

d)

Light Enhancing Detector

28.

Component that Convert AC to DC and allow current to flow in one Direction

a)

Capacitor

b)

Diode

c)

Inverter

d)

Resistor

29.

What is the name of this component?

a)

PN junction

b)

LED

c)

silicon

d)

PNP

30.

One function of the transistor is to_____________?

a)

rectify

b)

amplify

c)

limit

d)

control

31.

What type of logic gate is this table showing?

a)

AND

b)

OR

c)

NOT

32.

What type of logic gate is this table showing?

a)

AND

b)

OR

c)

NOT

33.

Which logic gate is this?

a)

AND

b)

OR

c)

NOT

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