Current Electri...

For a certain thermocouple, if the temperature of the cold junction is 0°C, the neutral temperature and inversion temperature are 285°C and 570°C, respectively. If the cold junction is brought to 10°C, then the new neutral and inversion temperatures are respectively

Consider the following statements A and B and identify the correct answers given below:
Statement A Peltier coefficient is numerically equal to the potential difference across the junctions of the thermocouple through which current is flowing.
Statement B According to Thomson, energy is neither absorbed nor evolved at the junction of a thermocouple but is observed or evolved only along the lengths of both the conductors.

Two metallic wires of the same material and same length have different diameters. If we connect them in series across a battery the heat produced is H₁. If we connect them in parallel to the same battery, the heat produced during the same time is H₂. Then

What will be the wattage of a 50 W, 200 V lamp when used on 160 V power supply?

What is the material for electric fuse?

A constant potential difference is applied across the ends of a wire. Which one of the following operations will reduce the rate of heat generation to half?

Two electric bulbs, one of 200 volt – 60 watt and the other of 200 volt – 200 watt are connected in a house wiring circuits,

In the fig. all bulbs are identical. The bulb that lights most brilliantly is

A, B, C in the Fig. are identical lamps. What changes occur in the brightness of the lamps when its switch S is closed?