Current Electri...

The magnitude of i in ampere unit is

A battery of e.m.f. E has an internal resistance ‘r’. A variable resistance R is connected to the terminals of the battery. A current I is drawn from the battery. V is the terminal P.D. If R alone is gradually reduced to zero, which of the following best describes I and V ?

In the circuit given here, the points A, B and C are 70 V, zero, 10 V respectively. Then

5 cells, each of e.m.f 0.2V and internal resistance 1 Ω are connected to an external circuit of resistance of 10 Ω. Find the current through external circuit.

In the circuit shown, the current through the 5 Ω. resistor is

In meter bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

50 Ω and 100 Ω resistors are connected in series. This connection is connected with a battery of 2.4 volt. When a voltmeter of 100 Ω resistance is connected across 100 Ωresistor, then the reading of the voltmeter will be

A 2 volt battery, a 15 Ω resistor and a potentiometer of 100 cm length, all are connected in series. If the resistance of potentiometer wire is 5Ω, then the potential gradient of the potentiometer wire is

An ammeter gives full scale deflection when current of 1.0 A is passed in it. To convert it into 10 A range ammeter, the ratio of its resistance and the shunt resistance will be

The accurate measurement of e.m.f can be obtained using