Ammeter
Trending Questions
Q. A milliammeter of range 10 mA and resistance 9 Ω is joined in a circuit as shown. The meter gives full scale deflection for current I when A and B are used as its terminals. i.e., current enters at A and leaves at B (C is left isolated). The value of I is
- 100 mA
- 900 mA
- 1 A
- 1.1 A
Q. To get maximum current through a resistance of 2.5 Ω, one can use m rows of cells, each row having n cells. The internal resistance of each cell is 0.5 Ω. What are the values of n and m if the total number of cells is 45?
- m=15, n=3
- m=9, n=5
- m=3, n=15
- m=5, n=9
Q. Find reading of the ammeter.
- π20√2
- π20
- zero
- π10√2
Q. The equivalent resistance between points A and B is:
- 45 Ω
- 135 Ω
- 452 Ω
- 652 Ω
Q. Two cells of emf 2E and E with internal resistance r1 and r2 respectively are connected in series to an external resistor R (see figure). The value of R, at which the potential difference across the terminals of the first cell becomes zero is
[Mains-2021, March 21st, Shift 2]
[Mains-2021, March 21st, Shift 2]
- r12+r2
- r1−r2
- r1+r2
- r12−r2
Q. What is the current through the coil of the ammeter, (Coil resistance: 1kΩ, shunt resistance: 1Ω, incoming current: 1A)
- 1mA
- 999μA
- 900μA
- 1001μA
Q. In an ammeter, 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, then the resistance of ammeter will be -
- 1499G
- 499500G
- 1500G
- 500499G
Q. What is the equivalent resistance of an ammeter that has a coil resistance of 1k Ω, and a shunt resistance of 1 Ω?
- 1.01Ω
- 0.99 Ω
- 1 Ω
- 10 Ω
Q. The current through the coil of the ammeter is (Coil resistance: 1kΩ, shunt resistance: 1Ω, incoming current: 1A).
- 100μA
- 999μA
- 900μA
- 1001μA
Q. A milliammeter of range 10 mA and resistance 9 Ω is joined in a circuit as shown. The meter gives full scale deflection for current I when A and B are used as its terminals. i.e., current enters at A and leaves at B (C is left isolated). The value of I is
- 100 mA
- 900 mA
- 1 A
- 1.1 A
Q. The equivalent resistance between points A and B is:
- 652 Ω
- 45 Ω
- 452 Ω
- 135 Ω
Q. A milliammeter of range 10 mA has a coil of resistance 1Ω. To use it as voltmeter of range 10 volt, the resistance that must be connected in series with it will be
- 999Ω
- 99Ω
- 1000Ω
- 100Ω
Q. The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery ?
- 40 A
- 10 A
- 30 A
- 20 A