# Rajasthan Board Class 12 Physics Solved Question Paper 2016

Solving previous years’ board question papers is a perfect practice to analyse your weak and strong areas so that you may amend your preparations accordingly. It will also help you to know about the important topics which are repeatedly asking in board exams. Students must have an idea about the pattern and difficulty level of the question paper before writing board exams. For this, students can solve previous years’ question papers. It will not only help students to get familiar with the difficulty level but also help them to know the correct way to write solution in the upcoming board exams.  In this article, we are providing the Rajasthan Board Class 12 Physics Solved Question Paper 2016 in the PDF form.

Structure of Rajasthan Board Class 12 Physics Paper:

 Question Nos. Marks Per Question 1 – 13 1 14 – 24 2 25 – 27 3 28 – 30 4

Note:

Students were provided internal choices in question number 21, 27, 28, 29 and 30 Students need

Some sample questions are given below:

## Question:

A charge q enters perpendicularly with the direction of a magnetic field  with a velocity . What would be the force acting on this charge?

## Solution:

The force is given by F = qvBsinθ where θ is the angle between the magnetic field and the particle velocity.

Now, it is given that the charge q enters perpendicularly with the direction of a magnetic field.

Therefore, θ = 90

Therefore, the force acting on the charge q is qvB.

Rajasthan Board Class 12 Physics Solved Question Paper 2018

## Question:

Write the Faraday's law of electromagnetic induction.

## Solution:

According to Faraday's law of electromagnetic induction “the magnitude of the induced emf in a circuit is equal to the time rate of change of magnetic flux through the circuit.

## Question:

What is farsightedness or hypermetropia?

## Solution:

The farsightedness (hyperopia) is a common vision condition in which you can see distant objects clearly, but objects nearby may be blurry. The degree of your farsightedness influences your focusing ability.

## Question:

Write the two examples of acceptor impurities.

## Solution:

An acceptor impurity accepts an electron from an adjacent atom to create a hole. They are also known as p-type impurities. The examples of acceptor impurities are boron, gallium, and indium.

## Question:

Write the SI unit of current denisity.

## Solution:

The SI unit of the current density is amperes per square metre (amp/m2).

Rajasthan Board Class 12 Physics Solved Question Paper 2017

## Question:

Write two characteristics of a material to constructs a permanent magnet. Give two examples of such materials.

## Solution:

The two characteristics of a material to constructs a permanent magnet are:

• The material should have high retentivity so that the magnet is strong and high coercivity so that the magnetisation is not erased by stray magnetic fields, temperature fluctuations or minor mechanical damage.
• The material should have a high permeability.

Examples of such materials are steel, alnico, cobalt steel and ticonal.

## Question:

What is stopping voltage (or cut voltage)? Plot a graph of variation of photoelectric current with collector plate potential for two incident radiations of same frequency and different intensities.

## Solution:

For a particular frequency of incident radiation, the minimum negative (retarding) potential V given to the plate A for which the photocurrent stops or becomes zero is called the cut-off or stopping potential.

The graph of variation of photoelectric current with collector plate potential for two incident radiations of same frequency and different intensities is given below:

## Question:

Write definitions

(i) Transducer

(ii) Modulation

## Solution:

(i) Transducer: Any device that converts one form of energy into another can be termed as a transducer. An electrical transducer may be defined as a device that converts some physical variable (pressure, displacement, force, temperature, etc) into corresponding variations in the electrical signal at its output.

(ii) Modulation: The original low frequency message/information signal cannot be transmitted to long distances. Therefore, at the transmitter, information contained in the low frequency message signal is superimposed on a high frequency wave, which acts as a carrier of the information. This process is known as modulation. There are several types of modulation like Amplitude Modulation (AM), Frequency Modulation (FM) and Phase Modulation (PM).

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