Q. AIDS is caused by -
1) water
2) bacteria
3) virus
4) fungus
Q. The powerhouse of cell is -
1) cell wall
2) mitochondrion
3) ribosome
4) nucleus
Q. The main component of green-house gases is -
1) carbon dioxide
2) methane
3) nitrous oxide
4) None of the above/More than one of the above
Q. The device to measure electric current is -
1) voltmeter
2) ammeter
3) voltameter
4) potentiometer
Q. In electrical motor -
1) heat is converted into electrical energy
2) electrical energy is converted into heat
3) electrical energy is converted into mechanical energy
4) mechanical energy is converted into electrical energy
Q. Human body contains -
1) about 70% water
2) 20%-30% water
3) 10%-20% water
4) 30%-40% water
Q. The unit of electric power is -
1) ampere
2) volt
3) coulomb
4) watt
Q. The value of 40 degrees Celsius in Fahrenheit scale is -
1) 1040F
2) 1000F
3) 1020F
4) 750F
Q. Choose the correct statement.
1) Wavelength of red light is less than violet light
2) Wavelength of red light is more than violet light
3) Wavelength of violet light is more than green light
4) Wavelength of violet light is more than yellow light
Q. Body temperature is regulated by -
1) thalamus
2) hypothalamus
3) cerebellum
4) medulla
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