MHT CET · Physics · Alternating Current
A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced?
- A The lamp shines more brightly
- B The lamp shines less brightly
- C There is no change in the brightness of the lamp
- D Brightness may increase or decrease depending on the frequency of the AC
Answer & Solution
Correct Answer
(B) The lamp shines less brightly
Step-by-step Solution
Detailed explanation
The lamp shines less brightly because, when capacity of the capaictor is reduced, the capacitive reactance \(\left(X_{C}=\frac{1}{\omega C}\right)\) increases and hence, the current through the lamp decreases.
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
- When light enters glass from vacuum, then the wavelength of lightMHT CET 2019 Easy
- A spherical liquid drop splits in to 729 identical spherical drops. If \(E\) is the surface energy of the original drop and \(U\) is the total surface energy of resulting drops, then \(\frac{E}{U}=\frac{1}{x}\). The value of \(x\) isMHT CET 2025 Medium
- What is the ratio of the velocity of sound in hydrogen \(\left(\gamma=\frac{7}{5}\right)\) to that in helium \(\left(\gamma=\frac{5}{3}\right)\) at the same temperature? (Molecular weight of hydrogen and helium is 2 and 4 respectively)MHT CET 2021 Medium
- An ideal transformer converts 220 a.c. to 3.3 kV a.c. to transmit a power of 4.4 kW . If primary coil has 600 turns then alternating current in secondary coil isMHT CET 2025 Medium
- A capacitor is made of a flat plate of area ' \(A\) ' and the second plate has staircase like structure. Width of each stair is ' \(a\) ' and its height is ' \(b\) '. The capacity of the capacitor is
MHT CET 2022 Medium - In Young's double slit experiment let 'd' be the distance between two slits and 'D' be the distance between the slits and the screen. Using a monochromatic source of wavelength ' \(\lambda\) ', in an interference pattern, third minimum is observed exactly in front of one of the slits. If at the same point on the screen first minimum is to be obtained, the required change in the wavelength is [d & D are not changed]MHT CET 2025 Medium
More PYQs from MHT CET
- A body of mass 1 kg begins to move under the action of a time dependent force \(\vec{F}=\left(t \hat{i}+2 t^2 \hat{j}\right) N\), where \(\hat{i}\) and \(\hat{j}\) are unit vectors along \(x\) and \(y\) axis. The power developed by above force at time \(t=3\) second will beMHT CET 2025 Medium
- If \(f(x)=e^{x} g(x), g(0)=2, g^{\prime}(0)=1\), then \(f^{\prime}(0)\)
isMHT CET 2011 Easy - Epihydrophily is observed in which of the following plants?MHT CET 2020 Hard
- Which among the following polymers restores it's original shape once stretched?MHT CET 2022 Easy
- " It is impossible to determine simultaneously the exact position and exact momentum of an electron. " This statement is calledMHT CET 2025 Easy
- In biprism experiment, 21 fringes are observed in a given region using light of wavelength \(480 Å\). If light of wavelength \(560 Å\) is used, the number of fringes in the same region will beMHT CET 2021 Medium