The current sensitivity of a moving coil galvanometer is \(5~\text{div/mA}\) and its voltage sensitivity (angular deflection per unit voltage applied) is \(20~\text{div/V}\). The resistance of the galvanometer is:
1. \(40~\Omega\)
2. \(25~\Omega\)
3. \(250~\Omega\)
4. \(500~\Omega\)
1. | Putting in parallel, a resistance of \(24~ \Omega\) |
2. | Putting in series, a resistance of \(15~ \Omega\) |
3. | Putting in series, a resistance of \(240~ \Omega\) |
4. | Putting in parallel, a resistance of \(15~ \Omega\) |
The resistance of an ammeter is 13 Ω and its scale is graduated for a current up to 100 A. After an additional shunt has been connected to this ammeter, it becomes possible to measure currents up to 750 A by this ammeter. The value of shunt resistance is:
1. 20
2. 2
3. 0.2
4. 2 k
The tangent galvanometer is used to measure:
1. Potential difference
2. Current
3. Resistance
4. In measuring the charge
Resistance of a Galvanometer coil is \(8~\Omega\) and \(2~\Omega\) shunt resistance is connected with it. If main current is \(1\) A then the current flow through \(2~\Omega\) resistance will be:
1. \(0.2\) A
2. \(0.8\) A
3. \(0.1\) A
4. \(0.4\) A