# Rajasthan Board Class 12 Physics Solved Question Paper 2018

Rajasthan Board of Secondary education has scheduled Class 12 Physics Paper on 11th March (Monday). Before appearing for the final board exam, students must check the difficultly level and paper pattern with the help of previous years’ solved question papers. It will not only help students to get familiar with the difficulty level but also help students to know the correct way to write solution in the upcoming board exams. Here, we are providing the Rajasthan Board Class 12 Physics Solved Question Paper 2018 in the PDF form. Students can download this question paper which is solved by experts of Physics.

## Salient features of Rajasthan Board Class 12 Physics Solved Question Paper 2018:

• Simple and stepwise solutions are provided for each question.
• Appropriate concepts have been used in solutions.
• Neat and clean diagrams are drawn wherever required.

## 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:

Question number 21, 27, 28, 29 and 30 have internal choices. Students need to attempt only one question.

Some sample questions from the Rajasthan Board Physics question paper 2018 are given below:

## Question:

Write the name of physical quantity whose unit is J/C. State whether this quantity is a vector or scalar?

## Solution:

The work required to transfer a unit positive electric charge from an infinite distance to a given point against an electric field is known as electric potential. It’s S.I unit is J/C and it is a scaler quantity as it has only magnitude no direction.

Rajasthan Board Class 12 Physics Solved Question Paper 2017

## Question:

Define Super Conductivity.

## Solution:

Superconductivity is a phenomenon in which the resistance of the material to the electric current flow is zero.

## Question:

Write the definition of figure of merit of Galvanometer.

## Solution:

The figure of merit is defined as the current required to produce a unit deflection on the galvanometer.

## Question:

Draw hysteresis curve (B-H curve) for a ferromagnetic substance.

## Question:

What does mean by work function for metals?

## Solution:

The minimum energy required to emit the electron from metal surface is known as work function. The S.I. unit of work function is Joule or electron volt (eV).

## Question:

Write the name of any one dopped semiconductor used for making light emitting diode(LED).

## Solution:

Gallium Arsenide (GaAs), Gallium Phosphide (GaP) or Gallium Arsenide Phosphide (GaAsP) are used for making light emitting diode(LED).

Rajasthan Board 12th Time Table 2019

## Question:

(a) What are logic gates?

(b) Draw a circuit diagram for dual-input AND Gate by using two diodes.

## Solution:

(a) Logic gates are the fundamental building blocks of digital integrated circuits which perform basic logical functions.

(b) The circuit diagram for dual-input AND Gate by using two diodes is given below:

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