Home
Class 12
PHYSICS
As shown in the figure, a metal rod make...

As shown in the figure, a metal rod makes rod makes contact with a particl circuit and completes the circuit. The circuit area is perpendicular ot a magneitc field with B = 0.15 T. If the resistance of the total circuit is `3Omega`, the force needed to move the rod as indicated with a constant speed of `2ms^(-1)` will be equal to

A

5.78 mN

B

3.75 mN

C

4.95 mN

D

11.23 mN

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

As shown in figure, a metal rod completes the circuit. The circuit area is perpendicular to a magnetic field with B = 0.15 T . If the resistance of the total circuit is 3 Omega , how large a force is needed to move the rod as indicated with a constant speed of 2 m/s?

As shown in the figure a metal rod makes contact and complete the circuit. The circuite is perpendicular to the magnetic field with B=0.15 tesla. If the resistance is 3Omega force needed to move the rod as indicated with a constant speed of 2m//sec is

The figure shows a metal rod (PQ), which makes contact and complete the circuit. The circuit is perpendicular to the magnetic field with B=1 T. If the resistance is 2 Omega , then force required to move the rod and indicated with a constant speed of 2m/s is

A 0.5m long metal rod PQ completes the circuit as shown in the figure. The area of the circuit is perpendicular to the magnetic field of flux density 0.15 T . If the resistance of the total circuit is 3Omega calculate the force needed to move the rod in the direction as indicated with a constant speed of 2 ms^(-1)

A metallic rod completes its circuit as shown in the figure. The circuit is normal to a magnetic field of B=0.15 tesla. If the resistances of the rod is 3Omega the force required to move the rod with a constant velocity of 2m//sec is- A. 3.75xx10^(-3) N B. 3.75 xx10^(-2) N C. 3.75 xx10^(2) N D. 3.75 xx10^(-4) N

A metal rod of length l cuts across a uniform magnetic field B with a velocity v. If the resistance of the circuit of which the rod forms a part is r, then the force required to move the rod is

A metal rod of length 2 m is rotating with an angualr velocity of 100 "rads"^(-1) in plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of the rod is

In the figure shown as uniform magnetic field |B|=0.5T is perpendicular to the plane of circuit. The sliding rod of length l=0.25 m moves uniformly with constant speed v=4ms^-1 . If the resistance of the sllides is 2Omega , then the current flowing through the sliding rod is

The conducting rod ab shown in figure makes contact with metal rails ca and db . The apparatus is in a uniform magnetic field 0.800 T , perpendicular to the plane of the figure. (a) Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed 7.50 m//s . (b) In what direction does the current flow in the rod? (c) If the resistance of the circuit abdc is 1.50 Omega (assumed to be constant), find the force (magnitude and direction) required to keep the rod moving to the right with a constant speed of 7.50 m//s . You can ignore friction. (d) Compare the rate at which mechanical work is done by the force (Fu) with the rate at which thermal energy is developed in the circuit (I^2R) .

A wire of length 1 m is moving at a speed of 2 ms^(-1) perpendicular to its length and a homogeneous magnetic field of 0.5T . The ends of the wire are joined to a circuit of resistance 6 Omega . The rate at which work is being done to keep the wire moving at constant speed is