Related Questions

Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
A Chromium
B Nickel
C Tungsten
D Cobalt
Hard disk এর পিছনের জাম্পার সেটিং ঠিক না থাকলে যে সমস্যা হয় -i. সফটওয়্যার install করা যায় নাii. Boot disk failureiii. Hard disk not found দেখায়নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
Permanent magnets are made of high carbon steel and
A 15% of cobalt
B 20% of cobalt
C 35% of cobalt
D 45% of cobalt
Hard steel is suitable for making permanent magnets because
A It has good residual magnetism
B Its hysteresis loop has large area
C Its mechanical strength is high
D Its mechanical strength is low
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
A Chromium
B Nickel
C Vanadium
D Cobalt
Residual magnetism in steel for magnets is increased by the addition of
A Nickel
B Cobalt
C Tungsten
D Chromium
A certain hard disk has a data transfer rate of 20 MB/sec. How much time is required to transfer 5 megabyte data from this disk to memory?
A 20 sec.
B 1 sec.
C 0.5 sec.
D 0.25 sec.
Before a disk drive can access any sector record, a computer program has to provide the record's disk address. What information does this address specify?
A Track number
B Sector number
C Surface number
D All of the above
E None of the above
'Stress-induced amnesia strikes the patient apparently without warning and the memory loss can be as complete as is induced by physical trauma.' which correction should be made to this sentence?
A replace 'strikes' with 'contracts'
B replace 'is' with 'that'
C remove 'apparently'
D change 'by' to 'in'
According to Fleming's right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of
A Motion of conductor
B Lines of force
C Either of the above
D None of the above

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