The internal resistance of a battery of e.m.f. 100 Vis `4 Omega`. A voltmeter of resistance `250 Omega` is used to measure the e.m.f. of the battery. What should be the minimum value of the voltmeter resistance so that the error in finding the e.m.f. of the battery may not be more than 1 percent?

A 100V battery has an internal resistance 3 Omega . What is the reading of a voltmeter having resistance 200 Omega , when placed across the terminals of the battery? What should be the minimum value of the voltmeter resistance so that the error in finding the emf of the battery may not be more than 1%?

The internal resistance of a battery of 100 V is 5 Omega . When the emf of the battery is measured by a voltmeter 20% error is found. What is the resistance of the voltmeter?

A resistance of 12 Omega is connected with a battery of emf 1.5volt to have 0.1A current. What is the intemal resistahce of the battery?

A coil of resistance 2Omega is immersed in 1 kg of water and is connected to the terminals of the battery of internal resistance 4Omega and emf 6 volt for 3 minutes. The increase in temperature of water is

A cell of emf 1.4V and internal resistance 2 Omega is connected in series with a resistance of 100 Omega and an ammeter. The resistance of the ammeter is 4/3 Omega .To measure the potential difference between the two ends of the resistance a voltmeter is connected IF the reading of the ammter is 0.02 A.what is the resistance of the voltmeter?

A battery of emf 10V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5A, what is the resistance of resistance of resistor ? What is the terminal voltage of the battery when the circuit is closed?

Current is sent through a galvanometer of resistance 50 Omega from a battery of emf 30V and of negligible internal resistance.There is a shunt of resistance 2 Omega connected in parallel with the galvanometer.Find out the resistance that should be connected in series with the battery to get a current of 10mA through the galvanometer.