If the magnetic field in a plane electro-magnetic wave is given by `vecB=3xx10^(-8) sin (1.6 xx 10^(3) x + 48 xx 10^(10)t)hatjT,` then average intensity of the beam is:
A
`0.21W//m ^(2)`
B
`0.24 W//m^(2)`
C
`0.34W//m^(2)`
D
`0.11 W//m^(2)`
Text Solution
Verified by Experts
The correct Answer is:
D
`I _(avg) = (CB_(0)^(2))/(2 mu _(0))=( 3xx 10^(8) m //s xx (3 xx 10^(-8) T )^(2))/(2xx4pi xx 10^(-7) T.m.A ^(-1))= (27)/(80pi) W//m^(2)` So, `I _(arg) = 0.11 W//m ^(2)`
If the magnetic field in a plane electromagnetic wave is given by vec(B) = 6 xx 10^(-8) sin (1.6 xx 10^(3) x + 48 xx 10^(10)t) hatj T ,. What will be expression for electric filed ?
If the magnetic field in a plane electromagnetic wave is given by vec(B) = 6 xx 10^(-8) sin (1.6 xx 10^(3) x + 48 xx 10^(10)t) hatj T ,. What will be expression for electric filed ?
If the magnetic field in plane electromagnetic was is given by vecB = 3 xx 10 ^( -8 ) sin ( 1.6 xx 10 ^( 3 ) x + 48 xx 10 ^( 10 ) t ) hatj T , then what will be expression for electric field ?
The magnetic field in a plane electromagnetic wave is given by B_(y) = 2 xx 10^(-7) sin (0.5 xx 10^(3)x + 1.5 xx 10^(11) t) . This electromagnetic wave is
The magnetic field in plane electromagnetic wave is given by B= 3.01 xx 10^(-7) sin (6.28 xx 10^(2)x + 2.2 xx 10^(10) t) I. [ where x in cm and t in second] The wavelength of the given wave is
The magnetic field in a plane electromagnetic wave is given by B_(y) = 2xx10^7 T sin (0.5xx10^3x+1.5xx10^11 t) T (a) What is the wavelength and frequency of the wave? (b) Write an expression for the eletric field.
The magnetic field in a plane electromagnetic wave is given by B_(y) = 2xx10^7 T sin (0.5xx10^3x+1.5xx10^11 t) T (a) What is the wavelength and frequency of the wave? (b) Write an expression for the eletric field.
The magnetic field in the plane electromagnetic wave is given by B_(z)=2xx10^(-7) sin(0.5xx10^(3)x+1.5xx10^(11)t) tesla. The expression for electric field will be:
The magnetic field in a plane em wave is given by B_y = 2 x 10 ^(-7) sin (pi x 10^3 x + 3 pi x 10^11 t )T Calculate the wavelength
Magnetic field in a plane electromagnetic wave is given by B_y = (10^-7 T) sin (10^3pix + 2pi×10^11)hatj Then expression of electric field will be
VMC MODULES ENGLISH-JEE MAIN REVISON TEST-23-PHYSICS (SECTION 2)
