✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
Assume that the surface charge density of the Earth is 1 electron charge/$\text{m}^2$. The potential of the Earth's surface (radius $6400\text{ km}$) will be :
A
$- 0\cdot 12\text{ V}$
B
$- 0\cdot 21\text{ V}$
C
$+ 2\cdot 1\text{ V}$
D
$+ 1\cdot 2\text{ V}$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 55-7 | Set 1 | Question 1 |
| CBSE 2026 | Series 55-7 | Set 2 | Question 11 |
| CBSE 2026 | Series 55-7 | Set 3 | Question 9 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)