JEE Mains · Physics · STD 12 -Alternating current
- JEE Mains 2021
- Medium
- MCQ
Match List\(-I\) with List\(-II\)
| List\(-I\) | List\(-II\) |
| \((a)\) Phase difference between current and voltage in a purely resistive \(AC\) circuit | \((i)\) \(\frac{\pi}{2} ;\) current leads voltage |
| \((b)\) Phase difference between current and voltage in a pure inductive \(AC\) circuit | \((ii)\) zero |
| \((c)\) Phase difference between current and voltage in a pure capacitive \(AC\) circuit | \((iii)\) \(\frac{\pi}{2} ;\) current lags voltage |
| \((d)\) Phase difference between current and voltage in an \(LCR\) series circuit | \((iv)\) \(\tan ^{-1}\left(\frac{X_{C}-X_{L}}{R}\right)\) |
Pick an option to check your answer.
Answer & Solution
Correct Answer
(D) \((a)-(ii),(b)-(iii), (c)-(i), ( d )-( iv )\)
Step-by-step Solution
Detailed explanation
\(\tan \phi=\frac{ V _{ L }- V _{ C }}{ V _{ R }}=\frac{ X _{ L }- X _{ C }}{ R }\)
More questions from Physics
- Two iron solid discs of negligible thickness have radius \(R_1\) and \(R_2\) and moment of intertia \(I_1\) and \(I_2\), respectively. For \(R_2=2 R_1\), the ratio of \(I_1\) and \(I_2\) would be \(1 / x\), where \(\mathrm{x}=\) ________ -JEE Mains 2025 Easy
- Curved surfaces of a plano-convex lens of refractive index \(\mu_{1}\) and a plano-concave lens of refractive index \(\mu_{2}\) have equal radius of curvature as shown in figure. Find the ratio of radius of curvature to the focal length of the combined lenses.
JEE Mains 2021 Hard - A parallel plate capacitor having capacitance \(12\, pF\) is charged by a battery to a potential difference of \(10\, V\) between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant \(6.5\) is slipped between the plates. The work done by the capacitor on the slab is.......\(pJ\)JEE Mains 2019 Hard
- Expression for an electric field is given by \(\vec{E}=4000 x^2 \hat{i} \frac{V}{m}\). The electric flux through the cube of side \(20\,cm\) when placed in electric field (as shown in the figure) is \(.........V cm\).
JEE Mains 2023 Medium - A helicopter is flying horizontally with a speed \('v'\) at an altitude \('{h}'\) has to drop a food packet for a man on the ground. What is the distance of helicopter from the man when the food packet is dropped?JEE Mains 2021 Hard
- In the experimental setup of meter bridge shown in the figure, the null point is obtained at a distance of \(40\,cm\) from \(A\). If a \(10\,\Omega \) resistor is connected in series with \(R_1\), the null point shifts by \(10\,cm\). The resistance that should be connected in parallel with \(\left( {{R_1} + 10} \right)\,\Omega \) such that the null point shifts back to its initial position is .............. \(\Omega\)
JEE Mains 2019 Hard
More PYQs from JEE Mains
- A physical quantity \(y\) is represented by the formula \(y=m^{2}\, r^{-4}\, g^{x}\,l^{-\frac{3}{2}}\). If the percentage error found in \(y, m, r, l\) and \(g\) are \(18,1,0.5,4\) and \(p\) respectively, then find the value of \(x\) and \(p\).JEE Mains 2021 Medium
- The half-life of a radioactive substance is \(T\). The time taken, for disintegrating \(\frac{7}{8}\) th part of its original mass will beJEE Mains 2023 Medium
- Which of the following statements are correct? \((A)\) Electric monopoles do not exist whereas magnetic monopoles exist. \((B)\) Magnetic field lines due to a solenoid at its ends and outside cannot be completely
straight and confined. \((C)\) Magnetic field lines are completely confined within a toroid. \((D)\) Magnetic field lines inside a bar magnet are not parallel. \((E)\) \(\chi=-1\) is the condition for a perfect diamagnetic material, where \(\chi\) is its
magnetic susceptibility. Choose the correct answer from the options given below:JEE Mains 2021 Medium - In a typical combustion engine the work done by a gas molecule is given \(W =\alpha^{2} \beta e ^{\frac{-\beta x ^{2}}{ KT }}\), where \(x\) is the displacement, \(k\) is the Boltzmann constant and \(T\) is the temperature. If \(\alpha\) and \(\beta\) are constants, dimensions of \(\alpha\) will beJEE Mains 2021 Hard
- A particle \(A\) of mass \(‘m’\) and charge \(‘q’\) is accelerated by a potential difference of \(50\, V\). Another particle \(B\) of mass \(‘4\, m’\) and charge \(‘q’\) is accelerated by a potential difference of \(2500\, V\). The ratio of de-Broglie wavelength \(\frac{{{\lambda _A}}}{{{\lambda _B}}}\) is close toJEE Mains 2019 Medium
- A square loop of side \(20\, {cm}\) and resistance \(1\, \Omega\) is moved towards right with a constant speed \({v}_{0}\). The right arm of the loop is in a uniform magnetic field of \(5\, {T}\). The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value \(4\, \Omega\). What should be the value of \(v_{0}\) so that a steady current of \(2\, {mA}\) flows in the loop ?
JEE Mains 2021 Hard