Q. The instrument used for detecting the presence of electric current in a circuit is -
1) Refractometer
2) Galvanometer
3) Viscometer
4) Diffractometer
Q. Which one of the following types of radiations has the smallest wavelength?
1) Microwaves
2) Infra-red
3) Visible light
4) X-rays
Q. Which one of the following is NOT a cause of depletion in groundwater?
1) Afforestation
2) Loss of forests
3) Excessive pumping of groundwater
4) Construction of large-scale concrete building
Q. Which one of the following is NOT a reason for the decrease in biodiversity?
1) Large scale deforestation
2) Exploitation of forest produce
3) Maintaining sacred groves
4) Encroachment in forest areas
Q. Which one of the following is NOT a component of the human male reproductive system?
1) Cervix
2) Urethra
3) Seminal vesicle
4) Vas deferens
Q. When the short circuit condition occurs, the current in the circuit -
1) becomes zero
2) remains constant
3) increases substantially
4) keeps on changing randomly
Q. The part of the human eye on which the image is formed is -
1) pupil
2) cornea
3) retina
4) iris
Q. A metallic wire having resistance of 20ω is cut into two equal parts in length. These parts are then connected in parallel. The resistance of this parallel combination is equal to -
1) 20ω
2) 10ω
3) 5ω
4) 15ω
Q. Two planets orbit the Sun in circular orbits, with their radius of orbit as R1= R and R2 = 4R. Ratio of their periods (T1T2) around the Sun will be -
1) 1/16
2) 1/8
3) 1/4
4) 1/2
Q. Cartilage is NOT found in -
1) larynx
2) nose
3) ear
4) urinary bladder
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