• info@ourselfstudy.com
  • 91-7349044845
  • Sign In
  • Register
  • Admission
wa

A circuit contains an ammeter, a batter of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be:

(A)

0.25A

(B)

0.5A

(C)

1A

(D)

2A

NEET - Medical UG-2015 Hard

Answer & Solution:

\(\large{R_{eq}~~of ~ammeter~=~={\Large{480×20\over 480+20}}=19.2\Omega~~~~~\\\text{Shunt is parallel to ammeter , so voltage is same across the both shunt and ammeter}\\Current~reading~of~ammeter~~={\Large{V_{ammeter}\over 19.2}}={\Large{30\over 19.2+40.8}}=0.5A }\)

Try for Free

Try for free

Other Questions of the same topic

Q1:

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected acrose the given cell, has values of.

(i) infinity                                 (ii) 9.5 \(\large \Omega \)

The 'balancing lengths, on the potentiometer wire are found to be 3m and 2.85 m, respectively. The value of internal resistance of the cell is:

(A)

0.25\(\large \Omega \)

(B)

0.95 \(\large \Omega \)

(C)

0.5 \(\large \Omega \)

(D)

0.75 \(\large \Omega \)

NEET - Medical UG-2014 Medium

Q2:

A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are V\(\large _{A}\), V\(\large _{B}\) and V\(\large _{C}\) respectively. Then :

(A)

\(\large V _{A}\neq V_{B}=V_{C}\)

(B)

\(\large V_{A}= V _{B}\neq V_{C}\)

(C)

\(\large V_{A}\neq V _{B}\neq V_{C}\)

(D)

\(\large V_{A}= V _{B}= V_{C}\)

NEET - Medical UG-2015 Easy

Q3:

Two metal wires of identical dimensions are connected in series. If \(\large \sigma _{1}\) and \(\large \sigma _{2}\) are the conductivities of the metal wires respectively, the effective conductivity of the combination is :-

(A)

\(\large \frac{\sigma _{1}\sigma _{2}}{\sigma _{1}+\sigma _{2}}\)

(B)

\(\large \frac{2\sigma _{1}\sigma _{2}}{\sigma _{1}+\sigma _{2}}\)

(C)

\(\large \frac{\sigma _{1}+\sigma _{2}}{2\sigma _{1}\sigma _{2}}\)

(D)

\(\large \frac{\sigma _{1}+\sigma _{2}}{\sigma _{1}\sigma _{2}}\)

NEET - Medical UG-2015 Medium

Chemistry Biology

Get Questions, Answer & Solutions for NEET

₹ 100

Your Success is our only Objective

We ensure your improvement in performance by providing outstanding online test preparation service with the best quality of question bank for your course.

Test Preparation

About OurSelfStudy

Newsletter

Subscribe monthly news letter with booster tips

Copyright © 2020-2024 www.OurSelfStudy.com All Rights Reserved