30 questions
The unit of electric current is
ohm
ampere
coulomb
watt
What is the unit of electric charge?
coulomb
watt
volt
ampere
In parallel combination of resistors total current
is not affected
increases
decreases
may increase or decrease
The A.C we use in our homes has a frequency of
30 Hz
40 Hz
50 Hz
60 Hz
From grid stations power is distributed at------------- volts to 220 volts for domestic and commercial use.
1000
1100
10000
11000
Which of the following is not true?
The unit of resistance is ohm.
A resistance is a device used to store charge.
The current in an open circuit is zero.
Electric current in a conductor decreases as the voltage across it increase.
There are -----------micro farad in one Farad.
10
103
106
109
Two cells each of 2 volts are connected in parallel.The total voltage across them will be
zero volt
1 volt
2 volt
4 volt
Ammeter is used to measure
resistance
Charge
current
Capacitance
First laser was ----------------laser.
solid
Liquid
gas
mixture
Till the end of the -----------century people greatly depend upon agriculture and related crafts.
16th
17th
18th
19th
In ----------------century there has been a great advance in technology especially in the field of electronics,telecommunication and computers
19th
20th
18th
21th
The first laser was invented in ------------
1950
1960
1970
1980
----------------- machines are used at airport to check luggage without opening it.
laser
ultrasound
x rays
radar
X rays cannot pass through -----------
clothes
plastic
bones
soft parts of our body
Frequency of ultrasound waves
below 10 KHz
below 20 KHz
Above 10 KHz
Above 20 KHz
Graphical record of the electrical activity of heart is obtained by
ECG
EEG
X Ray
MRI
Magnetic resonance imaging MRI basically images th ( NMR) signal from the ------------ nucleus.
Hydrogen
Carbon
oxygen
Nitrogen
------------- produces high quality three dimensional images of the inside of human body.
CT scan
MRI
EEG
ECG
Sputnik was sent into space by a powerful rocket in
1932
1957
1969
1989
The first satellite,badar1,was sent into space in
July,1990
June 1969
March 1957
August 1955
Space shuttle carries between
earth and moon
earth and other planets
earth and orbit around earth
earth to space
Pakistan Atomic Energy Commission was established in
1950
1955
1960
1965
PINSTECH started the supply of radioactive isotopes in
1957
1967
1975
1976
KANUPP is capable of producing ---------- megawatt of electricity was established in 1972.
127
137
147
157
Nuclear power plant at the right bank of chashma canal of river INDUS start functioning in
1992
1996
1998
1994
The first space shuttle columbia was launched on April 12,
1961
1971
1981
1989
Idea of permanent space station was given by -------scientist.
American
Chinese
Russian
Italian
The magnetic sphere and van Allen belts were discovered through artificial satellites during
1947 and 1948
1957 and 1958
1967 and 1968
1976 and 1978
--------------------satellites are usually situated at the height of 35900 Km above the earth.
meteorological
hovering
communication
Geostationary