A battery of emf `E` is connected with there resistance `R , 2R and 3R` in series. The voltage across `2R` is measured with a voltmeter whose resistance a `10R` .What is the percentage error ?

A battery of emf E is connected with there resistance R , 2R and R in series. The voltage across 2R is measured with a voltmeter whose resistance a 10R .What is the percentage error ?

The battery of EMF 5V and internal resistance 20Omega is connected with a resistance R_(1) = 50Omega and a resistance . A voltmeter of resistance 1000Omega is used to measure the potential difference across R1 .What percentage error is made in the reading.

A battery of emf 2 V and internal resistance r is connected in series with a resistor of 10Omega through an ammeter of resistance 2Omega . The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.

A battery of electro motive force E is connected in series with a resistance R and a voltmeter. An ammeter is connected in parallel with the battery.

A voltmeter of resistance R_1 and an ammeter of resistance R_2 are connected in series across a battery oif negligible internal resistance. When as resistance R is connected in parallel to voltmeter reading of ammeter increases three times white that of voltmeter reduces to one third. Find R_1 and R_2 in terms of R .

A voltmeter connected in series with a resistance R_1 to a circuit indicates a voltage V_1=198V . When a series resistor R_2=2R_1 is used, the voltmeter indicates as voltage V_2=180V . If the resistance of the voltmeter is R_V=900Omega , then the applied voltage ( in volt ) across A and B is

A battery of emf E and internal resistance r is connected to a variable resistor R as shown in figure. Which one of the following is true ?

N batteries each of emf E and internal resistance r are first connected in series and then in parallel to an external resistance R. if current through R is same in both cases then.

The series combination of two batteries, both of the same emf 10 V, but different internal resistance of 10 Omega and 5 Omega is connected to the parallel combination of two resistors 30 Omega and R Omega . The voltage difference across the battery of internal resistance 10 Omega is zero, the value of R (in Omega ) is : _________.

5When a cell of emf E and internal resistance r, is connected to the ends of a resistance R, then current through resistance is I. If the same cell is connected to the ends of a resistance R/2 then the current would be-