Test Details

Chap-1

Test

Nov 05, 10:00 PM

60 minutes

Nov 05, 11:00 PM

30.0 marks

MCQ

30 questions

Dharmendra prasad

Given your background, you could offer Prasad Master Classes focusing on preparing students for JEE Mains and NEET examinations. Here's how you might structure your classes: Curriculum Design: Comprehensive coverage of Class 11 and 12 Physics syllabus. Emphasis on topics frequently tested in JEE Mains and NEET. Teaching Methodology: Conceptual understanding with real-life examples. Problem-solving techniques and shortcuts. Regular quizzes and mock tests to track progress. Resource Material:

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Question Text

Question 1 :
Which of the following statements are true:A: Charge cannot exist without mass but mass can exist without charge B: Charge is invariant but mass varies with velocity C: Charge is conserved but mass alone may not be conserved

Question 3 :
Deuteron and $\alpha$-particle are put $1{A}^{o}$ apart in air. Magnitude of intensity of electric field due to deuteron of $\alpha$-particle is $(N/C)$

Question 4 :
The Gaussian surface for calculating the electric field due to a charge distribution is

Question 7 :
A drop of oil of density $\rho$ and radius $r$ carries a charge $q$ when placed in an electric field $E$, it moves upwards with a velocity $v$. If ${\rho}_{0}$ is the density of air, $\eta $ be the viscosity of the air, then which of the following force is directed upwards?

Question 8 :
An electric dipole placed with its axis in the direction of a uniform electric field experiences:

Question 9 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when an uncharged rod is brought near its disc ?

Question 10 :
The force between two point charges placed in a material medium of dielectric constant $\varepsilon_r$ is $F$. If the material is removed, then the force between them becomes:

Question 11 :
Assertion: Sometime, a crackling sound is heard while taking off sweater during winters. Reason: This is due to static electric charges.

Question 12 :
Two spheres of radii 2 cm and 3 cm have equal surface charge density. Calculate the ratio of their charges.

Question 13 :
The velocity of proton is proportional to (where $v$ is frequency)

Question 14 :
A charged body is brought near an uncharged gold leaf electroscope. What will be your observation if the body is charged?

Question 17 :
The solid angle subtended by the total surface area of a sphere at the centre is :

Question 18 :
State whether true or false. Metals as compared to non-metals are generally bad conductors of electricity.

Question 19 :
If a body acquires electric charge temporarily under the influence of charged body, then the process is called:

Question 20 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when a glass rod rubbed with silk is rolled on the disc of electroscope?

Question 21 :
Two point charges $+3\mu C$ and $+8\mu C$ repel each other with a force of $40 N$. If a charge of $-5\mu C$ is added to each of them, the force between them will become:

Question 22 :
Two identical metallic spheres A and B of exactly equal masses are given equal positive and negative charge respectively. Then:

Question 23 :
If electrical force between two charges is $200 N$ and we increase $10$% charge on one of the charges and decrease $10$% charge on the other, then electrical force between them for the same distance becomes :

Question 24 :
State whether true or false :Gauss law is applicable only when there is a symmetric distribution of charge.

Question 25 :
If the electric force between two unknown charges is attractive, identify which of the following statement must be true?

Question 26 :
Fill in the blank.$1$ Coulomb of charge contains_______number of electrons.

Question 27 :
A body is brought near to a negatively charged gold leaf electroscope. If the divergence of leaves increases. What is the nature of charge on the body?

Question 29 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is

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