COMEDK · Physics · 19. Current Electricity
Two resistances \(A\) and \(B\) have colour codes orange, blue, white and brown, red, green, respectively. Then, ratio of their resistances \(A: B\) is
- A \(3: 1\)
- B \(1: 3\)
- C \(1: 3 \times 10^{4}\)
- D \(3 \times 10^{4}: 1\)
Answer & Solution
Correct Answer
(D) \(3 \times 10^{4}: 1\)
Step-by-step Solution
Detailed explanation
Using colour code for carbon resistor, (For A) \(\begin{array}{ccc}\text { Orange } & \text { Blue } & \text { White } \\ \downarrow & \downarrow & \downarrow \\ 3 & 6 & 9\end{array}\) \(\therefore \quad R_{A}=36 \times 10^{9} \Omega\) Similarly, \((\) For \(B)\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The dimensional formula for inductance isCOMEDK 2019 Easy
- A block slides on rough horizontal surface with a velocity of \(20 \mathrm{~m} / \mathrm{s}\). It comes to rest after travelling a distance of 80 m . The coefficient of kinetic friction between block and surface is (Take, \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)COMEDK 2024 Hard
- Incident light of wavelength \(\lambda=800 \mathrm{~nm}\) produces a diffraction pattern on a screen \(1.5 \mathrm{~m}\) away when it passes through a single slit of width \(0.5 \mathrm{~mm}\). The distance between the first dark fringes on either side of the central bright fringe isCOMEDK 2024 Medium
- A coil of wire of a certain radius has 100 turns and a self inductance of \(15 \mathrm{mH}\). The self inductance of a second similar coil of 500 turns will beCOMEDK 2020 Hard
- A proton and an alpha particle are subjected to same potential difference \(V\). Their de-Broglie wavelengths \(\lambda_{p}, \lambda_{\alpha}\) will be in the ratioCOMEDK 2016 Easy
- Absorption co-efficient of an open window isCOMEDK 2019 Easy
More PYQs from COMEDK
- The expression \(\frac{2 \tan A}{1-\cot A}+\frac{2 \cot A}{1-\tan A}\) can be written asCOMEDK 2023 Medium
- The reactions taking place with \(\mathrm{2- Phenyl-2-bromopropane}\) as the starting material is shown below. Identify [A] and [B] formed in the reaction.
\(
\mathrm{C}_6 \mathrm{H}_5-\mathrm{C}\left(\mathrm{CH}_3\right)_2^{-} \mathrm{Br} \xrightarrow[\Delta]{\text { KOH Alcoholic }}[\mathrm{A}]
\)
\(
[\mathrm{A}]+\mathrm{HBr} \xrightarrow{\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO})_2 \mathrm{O}\right.}[\mathrm{B}]\)COMEDK 2023 Medium - On passing \(\mathrm{H}_{2} \mathrm{~S}\) into a solution containing both \(\mathrm{Zn}^{2+}\) and \(\mathrm{Cu}^{2+}\) in acidic medium, only CuS gets precipitate(d) This is becauseCOMEDK 2012 Hard
- The value of \(\int e^{x}\left(x^{5}+5 x^{4}+1\right) \cdot d x\) isCOMEDK 2020 Medium
- An object of height \(h\) is placed midway between \(f\) and \(2 f\) in front of a biconvex lens. A real inverted image is captured on a screen placed a little beyond \(2 f\) on the other side of the lens. If the whole arrangement is immersed in water without disturbing the object, lens and the screen positions, then the new image formed will beCOMEDK 2025 Medium
- A metal present in insulin isCOMEDK 2020 Easy