A potential difference of 250V is applied across a resistance of 1000 `ohm` is an electric iron.Find(i) th current and (ii) heat energy produced in 12 sec.

Solve the following examples/ numerical problems. A potential differnce of 250 volts is applied across a resistance of 1000 ohm in an electric iron. Find (1) the current (2) the heat produced in joule in 12 seconds. Keeping other conditions the same, if the length of the wire in the iron is reduced to half the original length ( by cutting the wire), what will be the current and heat produced?

A potential difference of 100 v is applied across a wire of resistance 50 ohm for one minute. Find the heat produced in joule.

A potential difference of 25 V is applied across a conductor of resistance 100 Omega . Find the current through the conductor.

Solve the following examples/ numerical problems. A potential difference of 100 v is applied across a resistor of resistance 50 ohm for 6 minutes and 58 seconds . Find the heat produced in (1) Joule (2) Calorie.

A potential difference of 100 v is applied across a wire for 6 minutes and 58 seconds . If the current through the wire is 0.1 A . Find the heat produced in calorie.

A potential difference of 100 v is applied across a wire for two minutes. If the current through the wire is 0.1 A , find the heat produced in joule.

The resistance of a conductor is 10 ohm. Find the current through it when a potential difference of 2 V is applied across it. To pass the same current through a conductor of resistance 40 Omega , how much potential difference should be applied across it?

Choose correct alternative. A potential difference of 20 V is applied across the ends of a coil. The amount of heat generated in it is 800 cal/s. The value of resistance of the coil will be

A potential difference of 0.75 V applied across a galvanometer causes a current of 15 mA to pass through it . If it can be coverted into ammeter of range of 25 A , the required shunt should be

The resistance of a device is 100 Omega . Find the current through it when a potential difference of 20 V is applied across it. To pass the same current through a device having resistance 200 Omega , how much potential difference should be applied across it?