A 2 m long metallic rod rotates with an angular frequency `200" rod "s^(-1)` about on axis normal to the rod passing through its one end. The other en

A 2 m long metallic rod rotates with an angular frequency `200" rod "s^(-1)` about on axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant megnetic field of 0.5 T parallel to axis exises everywhere. The emf developed between the centre and the ring is
A. 100V
B. 200V
C. 300V
D. 400V

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - B
The emf developed between the centre and the rings is
`epsi=(1)/(2)Bl^(2)omega=(0.5xx2^(2)xx200)/(2)=200V`

4 views Answered 2023-02-05 15:29

Related Questions

A metallic rod of 1 m length is rotated with a frequency of 50 `rev//s`, with on end hinged at the centre and the other end at the circumference of a

2 Answers 4 Views

An infinitely long rod lies along the axis of a concave mirror of focal length f. The near end of the rod is distance `u gt f` from the mirror. Its im

2 Answers 4 Views

A metre- long tube open at one end,with a movable pistonat the other end, shows resonance with a fixed frequency source(a tuning fork of frequency 340

2 Answers 4 Views

A wheel is subjected to uniform angular acceleration about its axis with its angular velocity is zero . In the first two seconds , it rotates through

2 Answers 4 Views

Initial angular velocity of a wheel is ` 2 rad//s` .It rotates with a constant angular acceleration of `3.5 rad//s^(2)` .Its angular displacement in 2

2 Answers 6 Views

A torque of 100 Nm acting on a wheel at rest, rotates it through 200 radians in 10 s. The angular acceleration of the wheel, in `rad//s^(2)` is

2 Answers 5 Views

Moment of inertia of a thin uniform rod about an axis passing through one end perpendicular to its length is I . Then moment of inertia the same rod a

2 Answers 5 Views

M.I. of a thin uniform rod about the axis passing through its centre and perpendicular to its length is `ML^(2)//12` . The rod is cut transversely int

2 Answers 8 Views

The moment of inertia of uniform circular disc about an axis passing through its centre is `6kgm^(2)` . Its M.I. about an axis perpendicular to its pl

2 Answers 5 Views

A rod of length l, density of material D and area of cross section is A . If it rotates about its axis perpendicular to the length and passing through

2 Answers 4 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)