Verified Solution • 2025–26 Session moderate

QNEET-2020-Ph-738: NEET 2020 Physics - Class 12 NEET-2020-Ph-738 Solution: A spherical conductor of radius 10 cm has a charge of \(3.2…

A spherical conductor of radius 10 cm has a charge of

3.2 \times 10^{-7}\ \text{C}

distributed uniformly. That is the magnetude of electric field at a point 15 cm from the centre of the sphere? (

\frac{1}{4\pi\epsilon_0} = 9 \times 10^9\ \text{Nm}^2/\text{C}^2

)

1.28 \times 10^5\ \text{N/C}

1.28 \times 10^6\ \text{N/C}

1.28 \times 10^7\ \text{N/C}

1.28 \times 10^4\ \text{N/C}

Multiple Choice Options

A 1.28 $\times$ _ 10 5 N/C
B 1.28 $\times$ _ 10 6 N/C
C 1.28 $\times$ _ 10 7 N/C
D 1.28 $\times$ _ 10 4 N/C

Step-by-Step Verified Solution

The electric field for the conducting sphere, away from the surface is given by, E = 1 4 � _ 0 Q r 2 = 9 _ 10 9 _ 3.2 _ 10 _ 7 225 _ 10 _ 4 = 0.128 _ 10 6 = 1.28 _ 10 5 N/C

Related Learning Resources & Exam Preparation

NEET PYQ Question Bank

Browse year-wise authentic previous years' questions with solutions

Authentic CBT Mock Tests

Simulate official exam environment with live timer and percentile scoring