Question

Can a body have a charge of (a) 0.32 10-18 C (b) 0.64 x 10-20 C (c) 4.8 x 10-21 C ?​

Answer 1

Answer :

all three aren't quantized

solution is up abv

sorry for my terrible handwriting

Answer 2

Answer:

(a) A body with a charge of 0.32 × 10⁻¹⁸ C is possible.

(b) A body with a charge of 0.64 × 10⁻²⁰ C is not possible.

(c) A body with a charge of 4.8 × 10⁻²1 C is not possible.

Explanation:

Concept,

• The charge of a body always occurs in the integral multiple of the fundamental unit charge.
• i.e. charge = q = ne (e = charge of an electron)
• It is the fundamental law of charge.

(a) 0.32 × 10⁻¹⁸ C

Let q =  0.32 × 10⁻¹⁸ C

Now, q = ne   (here e = 1.6 × 10⁻¹⁹ C)

0.32 × 10⁻¹⁸ C = n × 1.6 × 10⁻¹⁹ C

n = 2

As n= 2 is an integer,

A body with a charge of 0.32 × 10⁻¹⁸ C is possible.

(b)  0.64 × 10⁻²⁰ C

Let q =  0.64 × 10⁻²⁰ C

Now, q = ne (here e = 1.6 × 10⁻¹⁹ C )

0.64 × 10⁻²⁰ C = n × 1.6 × 10⁻¹⁹ C

n = 0.04

As n= 0.04 is not an integer,

A body with a charge of 0.64 × 10⁻²⁰ C is not possible.

(c)  4.8 × 10⁻²¹ C

Let q =  4.8 × 10⁻²¹ C

Now, q = ne (here e = 1.6 × 10⁻¹⁹ C )

4.8 × 10⁻²¹ C = n × 1.6 × 10⁻¹⁹ C

n = 0.03

As n= 0.03 is not an integer,

A body with a charge of 4.8 × 10⁻²1 C is not possible.

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