The capacitance between two plates increases with

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

$$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

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

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as ________ double cover butt joint.

A

Single riveted

B

Double riveted

C

Multi riveted

D

None of these

When two plates are butt together and riveted with cover plates with two rows of rivets, the joint is known as

A

Lap joint

B

Butt joint

C

Single riveted single cover butt joint

D

Double riveted double cover butt joint

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.

A

Single riveted

B

Double riveted

C

Both (A) and (B)

D

None of these

If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

A

decrease

B

increase

C

remains unchanged

D

become zero

Capacitance increases with

A

increase in plate area and decrease in distance between the plates

B

increase in plate area and distance between the plates

C

decrease in plate area and value of applied voltage

D

reduction in plate area and distance between the plates

Ten books are arranged in a row following a certain sequence. Among them 3 are History , 3 are Economics, 2 are Maths and 2 are English. From the left, there is an English book between a History and Maths book, a history book between a Maths and an English book, an Economics book between an English and a Maths Book. a Maths book between two Economics books and two Economics two Economics book between a Maths and a History book. Book of which subject is at the sixth position from the left?

A

English

B

Economics

C

History

D

Mathematics

In case of coutte flow, the fluid flow is between two large flat parallel plates with

A

Top plate moving and the bottom plate fixed

B

Bottom plate moving and the top plate fixed

C

Both the plates fixed

D

Both the plates moving

Velocity distribution for flow between two fixed parallel plates

A

Varies parabolically across the section

B

Is constant over the entire cross-section

C

Is zero at the plates and increases linearly to the midplane

D

None of these

The capacitance between two plates increases with

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