enEnglishguગુજરાતી
GUJCET · Physics · Electromagnetic Induction
The self inductance \(L\) of a solenoid of length \(l\) and area of cross section is \(A\) increases ________ (Here with fixed number of turns N ).
- A \(l\) increases and A decreases.
- B \(l\) decreases and A increases.
- C \(l\) and \(A\) increase.
- D Both \(l\) and A decrease.
Answer & Solution
Correct Answer
(B) \(l\) decreases and A increases.
Step-by-step Solution
Detailed explanation
B
self inductions \(L =\frac{\mu_0 N^2 A}{l}\)
\(L \propto \frac{ A }{l}\)
\(\therefore\) A increases and \(l\) decreases.
self inductions \(L =\frac{\mu_0 N^2 A}{l}\)
\(L \propto \frac{ A }{l}\)
\(\therefore\) A increases and \(l\) 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
- If the flux associated with a coil of 60 turn varies at the rate of \(1 \frac{Wb}{\text { hour }}\), the induced emf is __________ .GUJCET 2013 Easy
- The charge of the capacitor in LC oscillatory circuit, when the energy associated with inductor and capacitor are equal, is ______________ . ( \(Q_{0}\) is the initial charge on the capacitor.)GUJCET 2023 Easy
- Calculate the energy equivalent of 1 g of substance \(\qquad\) .GUJCET 2020 Medium
- The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm . Its focal length is 12 cm . What is the refractive index of material of lens?GUJCET 2021 Medium
- Current flowing through the cell and potential difference between its two poles obtained by obtained observations, observation table has been prepared. The internal resistance of cell is r.
order V volt I Ampiere 1 1.0 0.08 2 0.5 0.18 3 0.8 0.12
Find the emf of the cell used in experiment.GUJCET 2013 Easy - Electric field produced due to an infinitely long straight uniformly charged wire at a perpendicular distance of 2 cm is \(3 \times 10^8 NC ^{-1}\). Then, linear charge density on wire is _________. ( \(k=9 \times 10^9\) SI unit)GUJCET 2014 Hard
More PYQs from GUJCET
- Function \(f: R \rightarrow R , f(x)=2 x^2-5\) and \(g: R \rightarrow R , g(x)=\frac{x}{x^2+1}\) is defined then, \(g o f=\) ____________ .GUJCET 2020 Medium
- The length of sub normal to the any point is always constant then, curve is ____________ .GUJCET 2022 Easy
- Two wires of same material having lengths and radius in the ratio of \(3: 4\) and \(3: 2\) respectively are connected in parallel with a potential source of 6 V . The ratio of currents flowing through them \(I_1: I_2=\) ________.GUJCET 2014 Easy
- __________ is a natural contraceptive method.GUJCET 2020 Medium
- For the given reaction, identify the proper reagent.
GUJCET 2025 Hard - Which of the following compound has highest reactivity towards \(S_N 2\) reaction?GUJCET 2025 Medium