Question
If the capacitors in the previous question are joined in parallel, the capacitance and the breakdown voltage of the combination will be:
✓
Answer
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
$C_{eq} = C_1 + C_2$
Here,
$C_1 = C_2 = C$
$\therefore C_{eq} = 2C$
For the parallel combination of capacitors, the capacitance is given by
$C_{eq} = C_1 + C_2$
Here,
$C_1 = C_2 = C$
$\therefore C_{eq} = 2C$
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
Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is (a) F/4(b) 3F/4(c) F/8(d) 3F/ 8
If a 0.1 % increase in length due to stretching, the percentage increase in its resistance will be(a) 0.2 %(b) 2 %(c) 1 %(d) 0.1 %
A source voltage of $8V$ drives the diode in fig. through a current$-$limiting resistor of $100$ ohm. Then the magnitude of the slope load line on the $V-I$ characteristics of the diode is
→A coil of one loop is made from a wire of length $L$ and after that a coil of 2 loops is made from the same wire. The ratio of magnetic fields at the center is :
→The net resistance of a voltmeter should be large to ensure that:
- It does not get overheated.
- It does not draw excessive current.
- It can measure large potential differences.
- It does not appreciably change the potential difference to be measured.
Which resistor has color bands on it?
A charge +Q is moving upwards vertically. It enters a magnetic field directed to the north. The force on the charge will be towards(a) North (b) South(c) East (d) West
The resistance of a conductor is $5$ ohm at $50^{\circ} \mathrm{C}$ and $6$ ohm at $100^{\circ} \mathrm{C}$. Its resistance at $0^{\circ} \mathrm{C}$ is
→Laser beams are used to measure long distance because(a) They are monochromatic(b) They are highly polarised(c) They are coherent(d) They have high degree of parallelism
If the distance between H and Cl in HCl molecule is 1.28 A, then the value of electric dipole moment of this molecule will be (in Coulomb-meter):