JEE Mains · Physics · STD 12 -7. Alternating current
Match List\(-I\) with List\(-II\)
| List\(-I\) | List\(-II\) |
| \((A)\) \(AC\) generator | \((I)\) Detects the presence of current in the circuit |
| \((B)\) Galvanometer | \((II)\) Converts mechanical energy into electrical energy |
| \((C)\) Transformer | \((III)\) Works on the principle of resonance in \(AC\) circuit |
| \((D)\) Metal detector | \((IV)\) Changes an alternating voltage for smaller or greater value |
- A \((A)-(II), B-(I), (C)-(IV), (D)-(III)\)
- B \((A)-(II), B-(I), (C)-(III), (D)-(IV)\)
- C \((A)-(III), B-(IV), (C)-(II), (D)-(I)\)
- D \((A)-(III), B-(I), (C)-(II), (D) -(IV)\)
Answer & Solution
Correct Answer
(A) \((A)-(II), B-(I), (C)-(IV), (D)-(III)\)
Step-by-step Solution
Detailed explanation
\(AC\) generator converts mechanical energy into electrical energy. Galvanometer shows deflection when current passes through it so it is used to show presence of current in any wire. Transformer is used to step up or step down the voltage. Metals detectors contain inductor…
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
- An electron is moving under the influence of the electric field of a uniformly charged infinite plane sheet \(S\) having surface charge density \(+\sigma\). The electron at \(t=0\) is at a distance of 1 m from \(S\) and has a speed of \(1 m s ^{-1}\). The maximum value of \(\sigma\), if the electron strikes \(S\) at \(t=1 s\) is \(\alpha\left[\frac{m \epsilon_0}{e}\right] \frac{ C }{ m ^2}\). The value of \(\alpha\) is __________ .JEE Mains 2024 Medium
- A steam engine intakes \(50\, g\) of steam at \(100^{\circ} C\) per minute and cools it down to \(20^{\circ} C\). If latent heat of vaporization of steam is \(540 \,cal g ^{-1}\), then the heat rejected by the steam engine per minute is .........\(\times 10^{3}\)\(cal.\)JEE Mains 2022 Medium
- Match List \(- I\) with List \(- II\)
Choose the correct answer from the options given below:List\(-I\) (Layer of atmosphere) List\(-II\) (Approximate height over earth's surface) \((A)\) \(F_1\) - Layer \((I)\) \(10\,km\) \((B)\) \(D-\) Layer \((II)\) \(170-190\,km\) \((C)\) Troposphere \((III)\) \(100\,km\) \((D)\) \(E-\)layer \((IV)\) \(65-75\,km\) JEE Mains 2023 Medium - A circular disc of radius \(b\) has a hole of radius \(a\) at its centre (see figure). If the mass per unit area of the disc varies as \(\left( {\frac{{{\sigma _0}}}{r}} \right)\), then the radius of gyration of the disc about its axis passing through the centre is
JEE Mains 2019 Hard - A body takes \(4\, {min}\). to cool from \(61^{\circ} {C}\) to \(59^{\circ} {C}\). If the temperature of the surroundings is \(30^{\circ} {C}\), the time taken by the body to cool from \(51^{\circ} {C}\) to \(49^{\circ} {C}\) is \(....\,min\)JEE Mains 2021 Medium
-

An infinite wire has a circular bend of radius a, and carrying a current I as shown in figure. The magnitude of magnetic field at the origin \(O\) of the arc is given by :JEE Mains 2025 Easy
More PYQs from JEE Mains
- Let \(\alpha \in (0, \pi /2)\) be fixed. If the integral \(\int {\frac{{\tan \,x + \tan \,\alpha }}{{\tan \,x - \tan \,\alpha }}dx = A\left( x \right)\,\cos \,2\alpha + B\left( x \right)\,\sin \,2\alpha + C} \) where \(C\) is a constant of integration, then the functions \(A(x)\) and \(B(x)\) are respectivelyJEE Mains 2019 Hard
- If a rectangle is inscribed in an equilateral triangle of side length \(2 \sqrt{2}\) as shown in the figure, then the square of the largest area of such a rectangle is \(....\)
JEE Mains 2021 Hard - \(\smallint \frac{{2{x^{12}} + 5{x^9}}}{{{{\left( {{x^5} + {x^3} + 1} \right)}^3}}}dx = \)JEE Mains 2016 Hard
- Let \({S_k} = \frac{{1 + 2 + 3 + .... + k}}{k}\). If \(S_1^2 + S_2^2 + ....... + S_{10}^2 = \frac{5}{{12}}A\), then \(A\) equal toJEE Mains 2019 Hard
- When photons of wavelength \(\lambda _1\) are incident on an isolated sphere, the corresponding stopping potential is found to be \(V.\) When photons of wavelength \(\lambda _2\) are used, the corresponding stopping potential was thrice that of the above value . If light of wavelength \(\lambda _3\) is used then find the stopping potential for this caseJEE Mains 2016 Hard
- Let \(a, b \in R\). If the mirror image of the point \(P( a ,6,9)\) with respect to the line \(\frac{x-3}{7}=\frac{y-2}{5}=\frac{z-1}{-9}\) is \((20, b,-a-9),\) then \(|a+b|\) is equal to :JEE Mains 2021 Hard