HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions

Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing.

Obtain the equation for resolving the power of the microscope.

Discuss about astronomical telescope.

Mention different parts of the spectrometer.

Explain the preliminary adjustments of the spectrometer.

Explain the experimental determination of the material of the prism using a spectrometer.

A compound microscope has a magnification of 30. The focal length of eye piece is 5 cm. Assuming the final image to be at least distance of distinct vision, find the magnification produced by the objective.

A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. What is the distance between the first dark fringe on either side of the central bright fringe?

A compound microscope has a magnifying power of 100 when the image is formed at infinity. The objective has a focal length of 0.5 cm and the tube length is 6.5 cm. What is the focal length of the eyepiece.

What are the shapes of wavefront for source at infinite?

I₀ is the intensity of light existing between two cross Polaroids kept with their axes perpendicular to each other. A third polaroid is introduced between them. What must be the angle between the axes of the first and the newly introduced polaroid to get the maximum light from the whole arrangement?

The near point and the far point for a person are 50 cm and 500 cm, respectively. Calculate the power of the lens the person should wear to read a book held in hand at 25 cm. What maximum distance is clearly visible for the person with this lens on the eye?

What is mass defect?

If the voltage applied on a capacitor is increased from V to 2V, choose the correct conclusion.

A parallel plate capacitor stores a charge Q at a voltage V. Suppose the area of the parallel plate capacitor and the distance between the plates are each doubled then which is the quantity that will change?

Three capacitors are connected in a triangle as shown in the figure. The equivalent capacitance between points A and C is ______.

Define ‘capacitance’. Give its unit.

Obtain the expression for capacitance for a parallel plate capacitor.

Obtain the expression for energy stored in the parallel plate capacitor.

Explain in detail the effect of a dielectric placed in a parallel plate capacitor.