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Questions
1
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

A half ring of radius $$R$$ has a charge of $$\lambda$$ per unit length. The electric force on $$1 \mathrm{C}$$ charged placed at the centre is

A
zero
B
$$\frac{k \lambda}{R}$$
C
$$\frac{2 k \lambda}{R}$$
D
$$\frac{k \pi \lambda}{R}$$
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Positive charge $$Q$$ is distributed uniformly over a circular ring of radius $$R$$. A point particle having a mass $$(m)$$ and a negative charge $$-q$$ is placed on its axis at a distance $$x$$ from the centre. Assuming $$x < R$$, find the time period of oscillation of the particle, if it is released from there [neglect gravity].

A
$$\left[\frac{16 \pi^3 \varepsilon_0 R^3 m}{Q q}\right]^{1 / 2}$$
B
$$\left[\frac{8 \pi^2 \varepsilon_0 R^3}{q}\right]^{1 / 2}$$
C
$$\left[\frac{2 \pi^3 \varepsilon_0 R^3}{3 q}\right]^{1 / 2}$$
D
None of these
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion Mass of a body decreases slightly when it is negatively charged.

Reason Charging is due to transfer of electrons.

A
Both Assertion and Reason are correct, Reason is the correct explanation of Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
C
Assertion is correct and Reason is incorrect
D
Assertion is incorrect and Reason is correct
AIIMS Subjects
Physics
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Units & Measurement Motion in a Straight Line Motion in a Plane Laws of Motion Circular Motion Work, Energy and Power Center of Mass and Collision Rotational Motion Gravitation Properties of Matter Heat and Thermodynamics Oscillations Waves
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Organic Chemistry
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Biomolecules Cell Cycle and Cell Division Sexual Reproduction in Flowering Plants Microbes in Human Welfare Anatomy of Flowering Plants Transport in Plants Mineral Nutrition Respiration in Plants Biotechnology: Principles and Processes Biodiversity and Conservation Biological Classification Morphology of Flowering Plants Photosynthesis in Higher Plants Principles of Inheritance and Variation Molecular Basis of Inheritance Strategies for Enhancement in Food Production Biotechnology and It's Applications Organisms and Populations Environmental Issues Plant Kingdom Plant Growth and Development Ecosystem
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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Evolution
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