Tha scale of a galvanometer is divided into `150` equal divisions. The galvanometer be designed to read (i) `6` A per division and (ii) `1 V` per division?
Text Solution
Verified by Experts
Full-scale voltage `= 150` divisions`//2` divisions per `m V` `= 75 m V` Full-scale current`= 150` divisions`//10` divisions per `m A` `= 15 mA` So resistance of galvanometer is `G = ("Full-scale voltage")/("Full-scale current"1) = (75 xx 10^(-3))/(15 xx 10^(-3)) 5 Omega` (i) Range of ammeter is `I = 150 xx 6 = 900 A`. So, `S = (I_(G)G)/(I - I_(G)) = (15 xx 10^(-3) xx 5)/((900 - 15 xx 10^(-3))) = 8.3 xx 10^(-5) Omega` (ii) Range of voltmeter is `V = 150 xx 1 = 150 V`. So, `R = (V)/(I_(G)) - G = (150)/(15 xx 10^(-3)) - 5 = 9995 Omega`.
Topper's Solved these Questions
ELECTRICAL MEASURING INSTRUMENTS
CENGAGE PHYSICS|Exercise Solved Examples|4 Videos
ELECTRICAL MEASURING INSTRUMENTS
CENGAGE PHYSICS|Exercise Exercise 6.1|15 Videos
ELECTRIC POTENTIAL
CENGAGE PHYSICS|Exercise DPP 3.5|14 Videos
ELECTROMAGENTIC INDUCTION
CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos
Similar Questions
Explore conceptually related problems
The scale of galvanometer is divided into 150 equal divisions. The galvanometer has a current sensitivity of 10"divisions"//mA and the voltage sensitivity of 2"divisions"//mV . How the galvanometer be designed to read (i) 6A per division and (ii) 1 V per division?
The scale of a galvanometer is divided into 150 equal divisions. The galvanomter has a current sensitivity of 15 div per ma and voltage senstivity of 3 div per milliovolt. What is the resisance of the galvanometer?
A galvanomter scale is divided into 100 equal divisions. The current sensitivity is 10 divisions per mA and voltage sensitivity is 5 divisions per mV. How will you convert it to read (i) 8 A for full scale and (ii) 1 division per volt ?
1 cm on the main scale of a vernier callipers is divided into 10 equal parts. If 10 divisions of vernier coincide with 8 small divisions of main scale, then the least count of the calliper is.
A galvanometer with a scale divided into 150 equal division has a senstivity of 10 divisions per milliampere and a voltage senstivity of 2 divisions per milivolt. What is the resistance of the galvanometer ?
There are two Vernier calipers both of which have 1cm divided into 10 equal divisions on the main scale. The vernier scale of the calipers ( c_(1)) has 10 equal divisions that correspond to 9 main scale divisions. The Vernier scale of the other calipers ( C_(2)) has 10 equal divisions that correspond to 11 main scale divisions. the reading of the two calipers are shown in the figure. the measured values (in cm) by calipers C_(1) and C_(2) respectively, are
The distance advanced by the screw of a screw gauge is 2 mm in 4 rotations. Its cap is divided into 50 divisions. There is no zero error. If the screw reads 3 divisions on the main scale and 32 divisions of the cap, then the diameter (in mm ) of the wire is
A galvanometer with a scale divided into 100 equal divisions has a current sensitivity of 10 divisions per mA and a voltage sensitivity of 2 divisions per mV. What adoptions are required to read (i) 5A for full scale and (ii) 1 division per volt?
