Question
If the capacitors in the previous question are joined in parallel, the capacitance and the breakdown voltage of the combination will be:
- 2C and 2V
- C and 2V
- 2C and V
- C and V
✓
Answer
- 2C and V
Explanation:
In a parallel combination of capacitors, the potential difference across the capacitors remain the same, as the right-hand-side plates and the left-hand-side plates of both the capacitors are connected to the same terminals of the battery. Therefore, the potential remains the same, that is, V.
For the parallel combination of capacitors, the capacitance is given by
Ceq = C1 + C2
Here,
C1 = C2 = C
$\therefore$ Ceq = 2C
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A thermo couple develops 200μV between 0℃ and 100℃. If it develops 64μV and 76μV respectively between (0℃ - 32℃) and (32℃ - 70℃) then what will be the thermo emf it develops between 70℃ and 100℃
|
(a) 65 μV |
(b) 60 μV |
(c) 55 μV |
(d) 50 μV |
The capacity of a spherical conductor in MKS system is
|
(a) |
(b) |
(c) |
(d) |
The line on the earth's surface joining the points where the field is horizontal is
| (a) Magnetic meridian | (b) Magnetic axis | (c) Magnetic line | (d) Magnetic equator |
The distance between the circular plates of a parallel plate condenser 40mm in diameter, in order to have same capacity as a sphere of radius 1 metre is
|
(a) 0.01 mm |
(b) 0.1 mm |
(c) 1.0 mm |
(d) 10 mm |
A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 1 : 4 |
(d) 4 : 1 |
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm. What should be the wavelength of the light source in order to obtain 5th bright fringe at the same point
|
(a) 500 nm |
(b) 630 nm |
(c) 750 nm |
(d) 420 nm |
Making a light wave vibrate in only one plane is known as:
A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/ quantities constant along the length of the conductor is/are
|
(a) Current, electric field and drift speed |
(b) Drift speed only |
|
(c) Current and drift speed |
(d) Current only |
A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be:
Two sources of waves are called coherent if
|
(a) Both have the same amplitude of vibrations |
|
(b) Both produce waves of the same wavelength |
|
(c) Both produce waves of the same wavelength having constant phase difference |
|
(d) Both produce waves having the same velocity |