Related Questions

An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is ___________.
A nG
B (n - 1)G
C $$\frac{{\text{G}}}{{{\text{n}} - 1}}$$
D $$\frac{{\text{G}}}{{\text{n}}}$$
সিরিজে সংযুক্ত একটি এ্যামিটার এবং একটি অজানা রোধ দুটি একই রকম 1.5 V ব্যাটারীর দুই প্রান্তে সংযুক্ত আছে। যখন ব্যাটারী দুটি সিরিজে সংযুক্ত থাকে তখন এ্যামিটার। amp রিডিং প্রদর্শন করে। আবার ব্যাটারী দুটি সমান্তরালে সংযুক্ত করলে 0.6 amp রিডিং প্রদর্শন করে। ব্যাটারীর আভ্যন্তরিন রোধ কত ? (An ammeter and an unknown resistance are connected in series across two identical batteries of each 1.5 V. The ammeter shows current I amp and 0.6 amp when the batteries are connected in series and parallel, respectively. What is the internal resistance of the battery?)
A 13Ω
B 12Ω
C 1Ω
D 0.1Ω
E 23Ω
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
A 10 mm
B 15 mm
C 20 mm
D 25 mm
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
A Is at the maximum distance from CG of the rivet group
B Is at the minimum distance from CG of the rivet group
C Gives the maximum angle between the two forces Fa and Fm
D Gives the minimum angle between the two forces Fa and Fm
A single phase transformer has a maximum efficiency of 90% at full load and unity power factor. Efficiency at half load at the same power factor is -
A 87.8%
B 86.7%
C 88.26%
D 88.9%
A moving iron ammeter may be compensated for frequency errors by
A A shunt resistance
B A series inductance
C Shunt capacitance
D Series resistance
The function of shunt in an ammeter is to
A by pass the current
B increase the sensitivity of the ammeter
C increase the resistance of ammeter
D none of the above
The internal resistance of an ammeter should be
A Very small
B Medium
C High
D Infinity
An ammeter is a
A secondary instrument
B absolute instrument
C recording instrument
D integrating instrument
To measure the current out of the second resistor in a circuit consisting of four resistors, an ammeter can be placed
A Between the second and third resistors
B At the negative terminal of the source
C Between the third and fourth resistors
D At any point in the circuit

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