MHT CET · Physics · Current Electricity
Potentiometer wire is \(4 \mathrm{~m}\) long and potential difference of \(3 \mathrm{~V}\) is maintained between the ends. The e.m.f. of the cell which balances against a length of \(100 \mathrm{~cm}\) of the potentiometer wire is
- A 0.60 V
- B 0.20 V
- C 0.45 V
- D 0.75 V
Answer & Solution
Correct Answer
(D) 0.75 V
Step-by-step Solution
Detailed explanation
Potential gradient \(=\frac{3}{4} \frac{\mathrm{V}}{\mathrm{m}}\)
So, emf against \(100 \mathrm{~cm}=\frac{3}{4} \times 1 \mathrm{~V}=0.75 \mathrm{~V}\)
So, emf against \(100 \mathrm{~cm}=\frac{3}{4} \times 1 \mathrm{~V}=0.75 \mathrm{~V}\)
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 refracting angle of a glass prism is \(30^{\circ}\). A ray is incident on one of the faces and is perpendicular to it. The angle of deviation \(\delta\) between the incident ray and that leaves the prism is
(Refractive index of glass \(=1.5)\left(\sin \left(30^{\circ}\right)=0.5, \sin (48.6)=0.75\right)\)MHT CET 2022 Medium - A mass M attached to a horizontal spring executes S.H.M. of amplitude \(\mathrm{A}_{1}\). When
the mass M passes through its mean position, then a smaller mass \(\mathrm{m}\) is placed over
it and both of them move together with amplitude \(\mathrm{A}_{2}\). The ratio of \(\left(\frac{\mathrm{A}_{1}}{\mathrm{~A}_{2}}\right)\) isMHT CET 2020 Medium - The graph shows the variation of photocurrent with anode potential for four different radiations. Let \(I_a, I_b, I_c\) and \(I_d\) are intensities and \(f_a, f_b, f_c\) and \(f_d\) be the frequencies for the curves \(a, b, c\) and \(d\) respectively, then
MHT CET 2025 Medium - For a satellite orbiting around the earth in a circular orbit, the ratio of potential energy to kinetic energy at same height isMHT CET 2023 Medium
- When LED is manufactured by using aluminium gallium arsenide (AlGaAs), it emitsMHT CET 2025 Easy
- A fluid of density ' \(\rho\) ' is flowing through a uniform tube of diameter ' \(\mathrm{d}\) '. The coefficient of viscosity of the fluid is ' \(\eta\) ', then critical velocity of the fluid isMHT CET 2023 Easy
More PYQs from MHT CET
- The particular solution of the differential equation \(y\left(\frac{\mathrm{d} x}{\mathrm{~d} y}\right)=x \log x\) at \(x=\mathrm{e}\) and \(\mathrm{y}=1\) isMHT CET 2020 Medium
- A double slit experiment is immersed in water of refractive index \(1 \cdot 33\). The slit separation is \(1 \mathrm{~mm}\), distance between slit and screen is \(1 \cdot 33 \mathrm{~m}\). The slits are illuminated by a light of wavelength \(6300 Å\). The fringewidth isMHT CET 2020 Medium
- The potential energy of a simple harmonic oscillator, when the particle is half way to its end point isMHT CET 2007 Medium
- Which gas among the following contains maximum number of molecules at STP? (Molar masses in
\(\mathrm{g} \mathrm{mol}^{-1} \mathrm{CO}_{2}=44, \mathrm{Ar}=39 \cdot 9, \mathrm{CH}_{4}=16,\) \(\mathrm{O}_{2}=32\))MHT CET 2020 Easy - Let \(\overline{\mathrm{a}}=2 \hat{\mathrm{i}}+\hat{\mathrm{j}}-2 \hat{\mathrm{k}}\) and \(\overline{\mathrm{b}}=\hat{\mathrm{i}}+\hat{\mathrm{j}}\). If \(\overline{\mathrm{c}}\) is a vector such that \(\overline{\mathrm{a}} \cdot \overline{\mathrm{c}}=|\overline{\mathrm{c}}|,|\overline{\mathrm{c}}-\overline{\mathrm{a}}|=2 \sqrt{2}\) and the angle between \(\overline{\mathrm{a}} \times \overline{\mathrm{b}}\) and \(\overline{\mathrm{c}}\) is \(\frac{2 \pi}{3}\), then \(|(\overline{\mathrm{a}} \times \overline{\mathrm{b}}) \times \overline{\mathrm{c}}|=\)MHT CET 2023 Medium
- The post-fertilization change involves,MHT CET 2017 Hard