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Recent questions in Electromagnetic waves

Questions >> CBSE XII >> Physics >> Electromagnetic waves

A radio can tune any station in the $7.5 \;MHz$ to $12\;MHz$ band . What is the corresponding wave length band ?

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 $30\;MHz$ What is its wave length ?

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 $6800A^{\circ}$ and radio waves of wave length $500\;m$?

asked Aug 17, 2016 by meena.p

1 answer

A parallel plate capacitor made of circular plates each of radius $R=6.0\;cm$ has a capacitance $c= 100\;pF$. The capacitor is connected to a $230\;v$ a.c supply with an angular frequency of $300\;rad\;S^{-1}$ . What is the r.m.s value of the conduction current ?.Is the conduction current equal to the displacement current ?

asked Aug 16, 2016 by meena.p

1 answer

A parallel plate capacitor made of circular plates each of radius $R=6.0\;cm$ has a capacitance $c= 100\;pF$. The capacitor is connected to a $230\;v$ a.c supply with an angular frequency of $300\;rad\;S^{-1}$ . 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

asked Aug 16, 2016 by meena.p

1 answer

A parallel plate capacitor made of circular plates each of radius $R=6.0\;cm$ has a capacitance $c= 100\;pF$. The capacitor is connected to a $230\;v$ a.c supply with an angular frequency of $300\;rad\;S^{-1}$ . What is the r.m.s value of the conduction current ?

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?

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

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

asked Aug 16, 2016 by meena.p

1 answer

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