Related Questions

পাত-দূরত্ব d এবং ধারকত্ব C. এমন একটি সমান্তরাল পাত ধারকের পাত দুটির মাঝখানে d/2 পুরুত্ববিশিষ্ট একটি ধাতব পাত স্থাপন করা হলো। নতুন ধারকত্ব কত হবে? (A metal plate of thickness d/2 is inserted between the plates of a parallel plate capacitor with plate separation d and capacitance C. What is the new capacitance?)
A C/d
B C/2
C 4Cd
D 2c
In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)
A $$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
B $$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$
C $$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
D $$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
A Ceramic capacitor
B Mica capacitor
C Both will have identical value of capacitance
D It depends on applied voltage
While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is
A Short-circuited
B Open circuited
C Alright
D Leaky
The capacitance between two plates increases with
A shorter plate area and higher applied voltage
B shorter plate area and shorter distance between them
C larger plate area, longer distance between plates and higher,applied voltage
D larger plate area and shorter distance between plates
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will
A remain uncharged
B decrease
C increase
D become zero
Condensation polymerisation of __________ produces bakelite.
A Propylene
B Phenol & formaldehyde
C Phenol & acetaldehyde
D Urea & formaldehyde
Who invented Bakelite?
A Charles Goodyear
B Leo Hendrik Baekeland
C Roy Plunkett
D Henry Ford
Bakelite is a co-polymer of phenol and
A formaldehyde
B acetaldehyde
C benzaldehyde
D cinnamaldehyde
Bakelite is
A Same as polytetra flouro ethylene (PTFE)
B An inorganic polymer
C Same as thermoset phenol formaldehyde
D Not a polymer

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