The quantity of radiation absorbed by the black body in unit time will increase.

Since emissivity $=$ absorptivity, hence the quantity of radiation emitted by black body in unit time will increase.

Black body radiates more energy in unit time in the visible spectrum.

The reflected energy in unit time by the black body remains the same.

Ratio of work functions $\phi_1: \phi_2: \phi_3 =1: 2: 4$.

Ratio of work functional $\phi_1: \phi_2: \phi_3 =4: 2: 1$.

$\tan \theta$ is directly proportional to $\frac{h c}{e}$, where $h$ is Planck's constant and $c$ is the speed of light.

The violet colour light can eject photoelectrons from metals 2 and 3 .

Net force on the loop is zero.

Net torque on the loop is zero.

As seen from O , the loop rotates clockwise.

As seen from O , the loop rotates anticlockwise.

$h_{\mathrm{A}}>h_{\mathrm{c}^{\prime}} \mathrm{K}_{\mathrm{B}}>\mathrm{K}_{\mathrm{C}}$.

$h_{\mathrm{A}}>h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{C}}>\mathrm{K}_{\mathrm{A}}$.

$h_{\mathrm{A}}=h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{B}}=\mathrm{K}_{\mathrm{C}}$.

$h_{\mathrm{A}} < h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{B}}>\mathrm{K}_{\mathrm{C}}$.