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Recent questions in Electromagnetic waves
Questions
>>
CBSE XII
>>
Physics
>>
Electromagnetic waves
A radio can tune any station in the
7.5
M
H
z
to
12
M
H
z
band . What is the corresponding wave length band ?
cbse
class12
physics
ch8
sec-a
ncert
medium
asked
Aug 17, 2016
by
meena.p
1
answer
A plane electro magnetic wave travels in vaccum along z- direction . What can you say about the direction of its electric and magnetic field vectors ? If the frequency of the wave is
30
M
H
z
What is its wave length ?
cbse
class12
physics
ch8
sec-a
ncert
medium
asked
Aug 17, 2016
by
meena.p
1
answer
What physical quantity is the same for x- rays of wave length
10
−
10
m
red light of wave length
6800
A
∘
and radio waves of wave length
500
m
?
cbse
class12
physics
ch8
sec-a
ncert
easy
asked
Aug 17, 2016
by
meena.p
1
answer
A parallel plate capacitor made of circular plates each of radius
R
=
6.0
c
m
has a capacitance
c
=
100
p
F
. The capacitor is connected to a
230
v
a.c supply with an angular frequency of
300
r
a
d
S
−
1
. What is the r.m.s value of the conduction current ?.Is the conduction current equal to the displacement current ?
cbse
class12
physics
ch8
sec-a
ncert
easy
asked
Aug 16, 2016
by
meena.p
1
answer
A parallel plate capacitor made of circular plates each of radius
R
=
6.0
c
m
has a capacitance
c
=
100
p
F
. The capacitor is connected to a
230
v
a.c supply with an angular frequency of
300
r
a
d
S
−
1
. What is the r.m.s value of the conduction current ?Determine the magnitude of Bata point 3.0 cm from the axis between the plates
cbse
class12
physics
ch8
sec-b
ncert
medium
asked
Aug 16, 2016
by
meena.p
1
answer
A parallel plate capacitor made of circular plates each of radius
R
=
6.0
c
m
has a capacitance
c
=
100
p
F
. The capacitor is connected to a
230
v
a.c supply with an angular frequency of
300
r
a
d
S
−
1
. What is the r.m.s value of the conduction current ?
cbse
class12
physics
ch8
sec-a
ncert
easy
asked
Aug 16, 2016
by
meena.p
1
answer
The figure shows a capacitor made of two circular plate each of radius 12 cm and separated and separated by 5.0 mm . The capacitor is being changed by an external source (not shown in the figure ). The changing current is constant and equal to
0.15
A
Calculate the capacitor and the rate of change of potential difference between the plates. Is Kischoff's first rule valid at each plate of the capacitor?
cbse
class12
physics
ch8
sec-a
ncert
easy
asked
Aug 16, 2016
by
meena.p
1
answer
The figure shows a capacitor made of two circular plate each of radius 12 cm and separated and separated by 5.0 mm . The capacitor is being changed by an external source (not shown in the figure ). The changing current is constant and equal to
0.15
A
Calculate the capacitor and the rate of change of potential difference between the plates.obtain the displacement
cbse
class12
physics
ch8
sec-a
ncert
medium
asked
Aug 16, 2016
by
meena.p
1
answer
The figure shows a capacitor made of two circular plate each of radius 12 cm and separated and separated by 5.0 mm . The capacitor is being changed by an external source (not shown in the figure ). The changing current is constant and equal to
0.15
A
Calculate the capacitor and the rate of change of potential difference between the plates
cbse
class12
physics
ch8
sec-b
ncert
medium
asked
Aug 16, 2016
by
meena.p
1
answer
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