Filter By

## All Questions

#### Direction of electricity -

The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires in the opposite direction.

#### No. since capacitance is a proportionality constant, it depends neither on the charge on the plates nor on the potential. It only depends upon the size, shape of the capacitor and the separation between the plates. The formula that shows its dependence on the size and shape of the capacitor is as follows:

$C=\frac{\epsilon_{0} A}{d}$

Here, A is the area of the plates of the capacitor and d is the distance between the plates of the capacitor, which you will study in higher classes.

## Crack CUET with india's "Best Teachers"

• HD Video Lectures
• Unlimited Mock Tests
• Faculty Support

#### Does the potential difference between two points depend on the choice of zero potential or zero potential energy?

Potential difference between two points is always a difference therefore it does not depend on the choice of zero potential.

## JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

## NEET 2024 Most scoring concepts

Just Study 32% of the NEET syllabus and Score up to 100% marks

## Crack CUET with india's "Best Teachers"

• HD Video Lectures
• Unlimited Mock Tests
• Faculty Support

#### What is the role of external pinna in the outer ear?

The function of the pinna is to act as a kind of funnel which assists in directing the sound further into the ear.

#### Why echoes are easily produced in mountains and deep valleys?

Dear candidate,

Sound also acts like a wave. Mountains and deep valley areas are surrounded by the rocky surfaces of mountains, trees, etc and the area among them is also dense. Thus, when the sound wave touches the rocky surface, it comes back, and since there is no specific direction, it echoes everywhere.