Related Questions

Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
A Normal to both current and magnetic field
B In the same direction as current
C In a direction anti parallel to magnetic field
D None of the above
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
A Normal to both current and magnetic field
B In the direction of current
C Antiparallel to magnetic field
D In arbitrary direction
Ten new television shows appeared during the month of September. Five of the shows were sitcoms, three were hour-long dramas, and two were news-magazine shows. By January, only seven of these new shows were still on the air. Five of the shows that remained were sitcoms.
A Only one of the news-magazine shows remained on the air.
B Only one of the hour-long dramas remained on the air.
C At least one of the shows that was cancelled was an hour-long drama.
D Television viewers prefer sitcoms over hour-long dramas.
Aluminium bronze contains aluminium and copper in the ratio of
A 50 : 50
B 40 : 60
C 60 : 40
D 10 : 90
The machinability of aluminium increases when _________ is added to aluminium.
A Copper
B Magnesium
C Silicon
D Lead and bismuth
Which microscope is often used to view metal surfaces?
A Optical microscopes
B Scanning tunneling microscopes
C Electron microscopes
D None of the above
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
A Creep
B Fatigue
C Endurance
D Tensile
The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the
A Work hardening
B Bauschinger effect
C Creeping effect
D Stress recovery effect
Bacteria that can not be seen under microscope in Gram stain smear are
A Treponema palladium
B Mycobacterium leprae
C Mycoplasma pneumoniae
D Streptococcus pyogens
E Clostridium tetani
It is difficult to "discern" the sample that is on the slide unless the microscope is adjusted. (Choose the best alternative that replaces quoted words)
A discard
B arrange
C determine
D debate

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