Physics-
The sun delivers 103 W/m2 of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions 8m´20m is 1.6´105 W the radiation force on the roof will be -
Physics-General
N
N
N
N
N
N
N
N
Answer:The correct answer is: N
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physics-
The sun delivers 103W/m2 of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions 8m´20m, will be -
The sun delivers 103W/m2 of electromagnetic flux to the earth’s surface. The total power that is incident on a roof of dimensions 8m´20m, will be -
physics-General
physics-
An electric field of 300V/m is confined to a circular area 10 cm in diameter. If the field is increasing at the rate of 20V/m-s, the magnitude of magnetic field at a point 15cm from the centre of the circle will be
An electric field of 300V/m is confined to a circular area 10 cm in diameter. If the field is increasing at the rate of 20V/m-s, the magnitude of magnetic field at a point 15cm from the centre of the circle will be
physics-General
physics-
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 10m from the lamp will be -
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 10m from the lamp will be -
physics-General
physics-
To establish an instantaneous displacement current of 2A in the space between two parallel plates of1mF capacitor, the potential difference across the capacitor plates will have to be changed at the rate of
To establish an instantaneous displacement current of 2A in the space between two parallel plates of1mF capacitor, the potential difference across the capacitor plates will have to be changed at the rate of
physics-General
physics-
A flood light is covered with a filter that transmits red light. The electric field of the emerging beam is represented by a sinusoidal plane wave 
The average intensity of the sun will be
A flood light is covered with a filter that transmits red light. The electric field of the emerging beam is represented by a sinusoidal plane wave The average intensity of the sun will be
physics-General
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A long straight wire of resistance R, radius ‘a’ and length ‘l’ carries a constant current ‘I’. The pointing vector for the wire will be
A long straight wire of resistance R, radius ‘a’ and length ‘l’ carries a constant current ‘I’. The pointing vector for the wire will be
physics-General
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A plane electromagnetic wave of frequency 40 MHz travels in free space in the X-direction. At some point and at some instant, the electric field 
has its maximum value of 750 N/C in Y-direction The wavelength of the wave is
A plane electromagnetic wave of frequency 40 MHz travels in free space in the X-direction. At some point and at some instant, the electric field has its maximum value of 750 N/C in Y-direction The wavelength of the wave is
physics-General
physics-
A plane electromagnetic wave propagating in the x-direction has a wavelength of 60 mm. The electric field is in the y-direction and its maximum magnitude is 33Vm-1 The equation for the electric field as function of x and t is
A plane electromagnetic wave propagating in the x-direction has a wavelength of 60 mm. The electric field is in the y-direction and its maximum magnitude is 33Vm-1 The equation for the electric field as function of x and t is
physics-General
physics-
The length of a rectangular plate is measured by a meter scale and is found to be 10.0 cm. Its width is measured by vermier callipers as 1.00 cm. The least count of the meter scale and varmier callipers are 0.1cm and 0.01cm respectively (Obviously). Maximum permissible error in area measurement is
The length of a rectangular plate is measured by a meter scale and is found to be 10.0 cm. Its width is measured by vermier callipers as 1.00 cm. The least count of the meter scale and varmier callipers are 0.1cm and 0.01cm respectively (Obviously). Maximum permissible error in area measurement is
physics-General
chemistry-
Among the following outermost configurations of transition metals, which shows the highest oxidation state
In the first transition series 
shows the maximum oxidation state of + 7.
shows the maximum oxidation state of + 7.Among the following outermost configurations of transition metals, which shows the highest oxidation state
chemistry-General
In the first transition series shows the maximum oxidation state of + 7.
shows the maximum oxidation state of + 7.chemistry-
Which of the following ions has the least magnetic moment
S.NoIonElectronic configurationNo. of unpaired electrons
(i)
1(ii)
2(iii)
3(iv)
4
(magnetic moment)
there is only 1 unpaired electron so its magnetic moment is least.Which of the following ions has the least magnetic moment
chemistry-General
S.NoIonElectronic configurationNo. of unpaired electrons
(i)
1(ii)
2(iii)
3(iv)
4 (magnetic moment) there is only 1 unpaired electron so its magnetic moment is least.chemistry-
In first transition series, the melting point of 
is low because
Due to 
configuration, metallic bonds are weak. orbital is half filled as a result 
electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.
configuration, metallic bonds are weak. orbital is half filled as a result electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.In first transition series, the melting point of is low because
chemistry-General
Due to configuration, metallic bonds are weak. orbital is half filled as a result electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.
configuration, metallic bonds are weak. orbital is half filled as a result electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.chemistry-
Which element gives maximum balanced oxide
Among the transition metals Mn forms maximum no. of oxides.
Which element gives maximum balanced oxide
chemistry-General
Among the transition metals Mn forms maximum no. of oxides.
chemistry-
Which of the following general configuration of outermost shell represents chromium element [Cr’s atomic number = 24]
This configuration is more stable because of symmetrical distribution of e– and exchange energy.
Which of the following general configuration of outermost shell represents chromium element [Cr’s atomic number = 24]
chemistry-General
This configuration is more stable because of symmetrical distribution of e– and exchange energy.
chemistry-
The element having general electronic configuration 
is
Transition metal as its last electron enters d-orbital.
The element having general electronic configuration is
chemistry-General
Transition metal as its last electron enters d-orbital.