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A vector $\vec{A}$ lying in the x-y plane can be resolved into its components as $\vec{A} = A_x \hat{i} + A_y \hat{j}$. What do $A_x$ and $A_y$ represent?
The NCERT states, 'The quantities $A_x$ and $A_y$ are called x-, and y- components of the vector'.
Which of the following properties is true for vector addition?
The summary lists: 'Vector addition is commutative : $\vec{A} + \vec{B} = \vec{B} + \vec{A}$' and 'It also obeys the associative law : $(\vec{A} + \vec{B}) + \vec{C} = \vec{A} + (\vec{B} + \vec{C})$'.
A null or zero vector has:
The summary defines: 'A null or zero vector is a vector with zero magnitude. Since the magnitude is zero, we don’t have to specify its direction.'
The subtraction of vector $\vec{B}$ from vector $\vec{A}$ is defined as:
The summary clearly states: 'The subtraction of vector B from A is defined as the sum of A and – B : $\vec{A} – \vec{B} = \vec{A} + (– \vec{B})$'.
Which of the following statements about uniform circular motion is true?
In 'POINTS TO PONDER', point 4 states: 'The kinematic equations for uniform acceleration do not apply to the case of uniform circular motion since in this case the magnitude of acceleration is constant but its direction is changing.'
The scalar product of two vectors $\vec{A}$ and $\vec{B}$ is given by $\vec{A}\cdot\vec{B} = AB\cos\theta$. Geometrically, $B\cos\theta$ represents the:
The NCERT text explains the scalar product: 'Geometrically, $B\cos\theta$ is the projection of B onto A in Fig.5.1 (b) and $A\cos\theta$ is the projection of A onto B in Fig. 5.1 (c). So, A.B is the product of the magnitude of A and the component of B along A.'
What is the fundamental conclusion of Gauss's Law for Magnetism?
According to the provided text, 'Thus, Gauss’s law for magnetism is: The net magnetic flux through any closed surface is zero.' This is the core statement of the law.
The absence of magnetic monopoles has a direct implication on Gauss's Law for Magnetism. Which of the following statements best describes this implication?
The text states: 'The difference between the Gauss’s law of magnetism and that for electrostatics is a reflection of the fact that isolated magnetic poles (also called monopoles) are not known to exist.' And in 'MOVING_CHARGES_AND_MAGNETISM' chapter, it's mentioned 'These lines called magnetic field lines form closed loops. This is unlike the electrostatic field lines which originate from positive charges and end at negative charges.' The absence of monopoles means there are no sources or sinks for magnetic field lines, hence they must form closed loops.
Gauss's Law for Magnetism is analogous to Gauss's Law for Electrostatics in which of the following aspects, concerning their mathematical forms?
The text states: 'Ampere’s law is to Biot-Savart law, what Gauss’s law is to Coulomb’s law. Both, Ampere’s and Gauss’s law relate a physical quantity on the periphery or boundary (magnetic or electric field) to another physical quantity, namely, the source, in the interior (current or charge).'
Which of the following is presented as the simplest magnetic element in the context of Gauss's Law for Magnetism?
The text clearly states: 'There are no sources or sinks of B; the simplest magnetic element is a dipole or a current loop.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.