An ideal ammeter has ___________ resistance.

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

An ammeter should have ___________ resistance.

A

Infinite

B

Very large

C

Very low

D

None of the above

The internal resistance of an ammeter should be

A

Very small

B

Medium

C

High

D

Infinity

When an ammeter is inserted in the circuit, the circuit current will ___________.

A

Increase

B

Decrease

C

Remain the same

D

None of the above

An ammeter is connected in ___________ with the circuit element whose current we wish to measure

A

Series

B

Parallel

C

Series or parallel

D

None of the above

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

Power is measured in a three-phase load by using an ammeter.

A

True

B

False

An ammeter is a

A

secondary instrument

B

absolute instrument

C

recording instrument

D

integrating instrument

An ideal ammeter has ___________ resistance.

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