MCQ
How many capacitors having at least 2 µF capacitance
will give 5 µF capacitance?
- AThree
- ✓Four
- CFive
- DSeven
✓
Answer
Correct option: B.
Four
(b)Four
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
Coulomb's Law agrees with $........$?
→For any charge configuration, equipotential surface through a point is $......$ to electric field at that point.
→An $AC$ generator is a device which converts:
→In a photo-emissive cell, with exciting wavelength $\lambda$ , the maximum kinetic energy of electron is $K$. If the exciting wavelength is changed to $\frac{3\lambda}{4}$ the kinetic energy of the fastest emitted electron will be:
→A proton and an alpha particle both enter a region of uniform magnetic field $B,$ moving at right angles to the field $B.$ If the radius of circular orbits for both the particles is equal and the kinetic energy acquired by proton is $1\,\, MeV,$ the energy acquired by the alpha particle will be......$MeV$
→The condition under which a microwave oven heats up a food item containing water molecules most efficiently is
A man runs towards a mirror at a speed $15 \,m/s $ The speed of the image relative to the man is......$m{s^{ - 1}}$
→A parallel-plate capacitor of area $A,$ plate separation $d$ and capacitance $C$ is filled with four dielectric materials having dielectric constants $K_1,K_2,K_3$ and $K_4$ as shown in the figure. If a single dielectric material is to be used to have the same capacitance $C$ in this capacitor, then its dielectric constant $K$ is given by
→The focal length of the objective and eye piece of a telescope are respectively $60 \,cm$ and $10\, cm$. The magnitude of the magnifying power when the image is formed at infinity is
→I ampere current flows in a conducting wire for t seconds. If resistance of the wire is R ohms, then magnitude of produced heat in joules according to Joule's law is: