A copper rod of length l is rotated about one end perpendicular to the – McqOptions

MCQOPTIONS

1.	A copper rod of length l is rotated about one end perpendicular to the magnetic field B with constant angular velocity \[\omega \]. The induced e.m.f. between the two ends is [MP PMT 1992; Orissa JEE 2003]
A.	\[\frac{1}{2}B\omega {{l}^{2}}\]
B.	\[\frac{3}{4}B\omega {{l}^{2}}\]
C.	\[26.6\mu \,F\]
D.	\[2B\omega {{l}^{2}}\]
Answer» B. \[\frac{3}{4}B\omega {{l}^{2}}\]

Discussion

No Comment Found

Related MCQs

When a bar magnet falls through a long hollow metal cylinder fixed with its axis vertical, the final acceleration of the magnet is [BVP 2003]
In the diagram shown if a bar magnet is moved along the common axis of two single turn coils A and B in the direction of arrow [Kerala (Engg.) 2001]
Lenz?s law applies to [DCE 1999]
To induce an e.m.f. in a coil, the linking magnetic flux [KCET 1994]
The dimensions of magnetic flux are [MP PMT 1994; CBSE PMT 1999]
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is [MP PET 1993]
Lenz's law is consequence of the law of conservation of [JIPMER 1997; CPMT 1990; RPMT 1997; MP PET 1999; MP PMT 2000, 03; RPET 2003; AFMC 2004]
In a coil of area \[10\ c{{m}^{2}}\] and 10 turns with a magnetic field directed perpendicular to the plane and is changing at the rate of \[{{10}^{8}}\]gauss/second. The resistance of the coil is 20 ohm. The current in the coil will be [CPMT 1976]
A 50 turns circular coil has a radius of \[3\ cm\], it is kept in a magnetic field acting normal to the area of the coil. The magnetic field \[B\] increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coil is [MP PET 1994]