AP EAPCET 2023 - 15th May Evening Shift

If $\mathbf{F}=(4 \hat{\mathbf{i}}-10 \hat{\mathbf{j}}) \mathrm{N}$ and $\mathbf{r}=(-5 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}) \mathrm{m}$, then $(\mathbf{r} \times \mathbf{F})$ is

The material used in the fabrication of infrared LED's is

In a transistor, when the emitter current changes by 9.85 mA , the collector current changes to 9.5 mA . Then, the base current is

An object of mass 3 kg is executing simple harmonic motion with an amplitude $\frac{2}{\pi} \mathrm{~m}$. If the kinetic energy of the object when it crosses the mean position is 6 J , the time period of oscillation of the object is

As shown in the figure, a block of weight 20 N is connected to the top of a smooth inclined plane by massless spring of constant $8 \pi^2 \mathrm{Nm}^{-1}$. If the block is pulled slightly from its mean position and released, the period of ...

Two forces whose magnitudes are in the ratio $5: 3$ are acting at a point at angle $60^{\circ}$ simultaneously. If the resultant of the two forces is 35 N , then the magnitudes of two forces respectively are

In a Young's double slit experiment, if the wavelength of light is increased by 50\% and the distance between the slits is doubled, then the percentage change in fringe width is

A string of length $L$ is stretched by $L / 20$ and the speed of transverse waves along it is $v$. The speed of wave when it is stretched by $L / 10$ will be
(assume that Hooke's law is applicable)

A body of mass 2 kg is moving with a constant acceleration of $(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}-\hat{\mathbf{k}}) \mathrm{ms}^{-2}$. If the displacement made by the body is $(3 \hat{\mathbf{i}}-\hat{\mathbf{j}}+2 \hat{\mathbf{k}}) \ma...

In the case of non-conservative forces, the following statement is correct.