Two points A and B are maintained at the potentials of 18 V and -5 V respectively. What will be the work done in moving 150 α -particles from A to B ?

Question

Two points A and B are maintained at the potentials of 18 V and -5 V respectively. What will be the work done in moving 150 α -particles from A to B ? (A) 4 × 10-12 J (B) 8 × 10-8 J (C) 2 × 10-15 J (D) 1.1 × 10-15 J

Tardigrade Admin · Accepted Answer

W = q Δ V W =150 × e ( V B - V A ) ∴ W=150 × 2 × 1.6 × 10-19(-5-18) W =11040 × 10-19 J W =1.1 × 10-15 J

Q. Two points $A$ and $B$ are maintained at the potentials of $18 V$ and $- 5 V$ respectively. What will be the work done in moving $150 α$ -particles from $A$ to $B$ ?

$4 \times 1 0^{- 12} J$

$8 \times 1 0^{- 8} J$

$2 \times 1 0^{- 15} J$

$1.1 \times 1 0^{- 15} J$

$W = q Δ V$
$W = 150 \times e (V_{B} - V_{A})$
$∴ W = 150 \times 2 \times 1.6 \times 1 0^{- 19} (- 5 - 18)$
$W = 11040 \times 1 0^{- 19} J$
$W = 1.1 \times 1 0^{- 15} J$

Q. Two points A and B are maintained at the potentials of 18V and −5V respectively. What will be the work done in moving 150α -particles from A to B ?

4×10−12J

8×10−8J

2×10−15J

1.1×10−15J