The equivalent capacitance between A and B is as the given figure:


1. \(16 \pi \epsilon_ 0 r\)
2. \(4 \pi \epsilon_ 0 r\)
3. \(8 \pi \epsilon_ 0 r\)
4. None of these

Subtopic:  Combination of Capacitors |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Two metallic spheres of radii 2cm and 3cm are given charges 6mC and 4mC respectively. The final charge on the smaller sphere will be if they are connected by a conducting wire

(1) 4mC

(2) 6mC

(3) 5mC

(4) 10mC

Subtopic:  Electric Potential |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

When a proton at rest is accelerated by a potential difference \(V\), its speed is found to be \(v\). The speed of an \(\alpha\text{-particle}\) when accelerated by the same potential difference from rest will be: 
1. \(v\) 2. \(v \over \sqrt{2}\)
3. \(v \sqrt{2}\) 4. \(2v\)
Subtopic:  Electric Potential |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

In the circuit shown in figure, energy stored in \(6~\mu\text{F}\) capacitor will be:
      

1. \(48 \times10^{-6}~\text{J}\) 2. \(32 \times10^{-6}~\text{J}\)
3. \(96 \times10^{-6}~\text{J}\) 4. \(24 \times10^{-6}~\text{J}\)
Subtopic:  Energy stored in Capacitor |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The figure shows some of the equipotential surfaces. Magnitude and direction of the electric field is given by

              

1. 200 V/m, making an angle 1200 with the x-axis

2. 100 V/m, pointing towards the negative x-axis

3. 200 V/m, making an angle -600 with the x-axis

4. 100 V/m, making an angle 300 with the x-axis

Subtopic:  Relation between Field & Potential |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

An air capacitor of capacity C=10μF is connected to a constant voltage battery of 12 V. Now the space between the plates is filled with a liquid of dielectric constant 5. The charge that flows now from battery to the capacitor is

1. 120 μC

2. 699 μC

3. 480 μC

4. 24 μC

Subtopic:  Dielectrics in Capacitors |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

A and B are two concentric metallic shells. If A is positively charged and B is earthed, then electric

                                             

1.  Field at common centre is non-zero

2.  Field outside B is nonzero

3.  Potential outside B is positive

4.  Potential at common centre is positive

Subtopic:  Electric Potential |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The electric potential at a point at distance 3R from the centre of disc
of radius R lying in the axis of the disc whose surface charge density is σ
will be given by:
1. σ2ε02-3R                          2. σ2ε02+3R
3.σ2ε03-2R                           4. σ2ε03+2R

Subtopic:  Electric Potential |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

An elementary particle of mass m and charge e is projected with velocity v at a much more massive particle of charge Ze, where . What is the closest possible approach of the incident particle ?

(1) 

(2) 

(3) 

(4) 

Subtopic:  Electric Potential Energy |
 58%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Capacitors C1=10μF and C2=30μF are connected in series across a source of emf 20KV. The potential difference across C1 will be

(1) 5 KV

(2) 15 KV

(3) 10 KV

(4) 20 KV

Subtopic:  Combination of Capacitors |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch