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Description : Consider two water drops at a temperature T. These drops are NOT allowed to exchange energy with their environment. These two drops collide and combine. How does the temperature of these drops change when they combine? Does it: w) decrease x) remain the same y) increase

Answer : ANSWER: Y -- INCREASE

Description : Velocity of sound in air does not change with the change of (1) Temperature of air (2) Pressure of air (3) Moisture content in air (4) Wind in the direction of propagation of sound

Answer : Pressure of air

Description : The amount of heat required to change a boiling liquid to a gas at the same temperature depends on one of the following properties of the liquid. Does it depend on the liquid's: w) heat of fusion x) heat of vaporization y) temperature z) density

Answer : ANSWER: X -- HEAT OF VAPORIZATION

Description :  A resistor in which the resistance changes exponentially with change in temperature is called as A) Potentiometer B) Phototransistor C) Varactor D) Thermistor 

Answer :  A resistor in which the resistance changes exponentially with change in temperature is called as Thermistor 

Description : A diode in which the change in reverse bias voltage varies the capacitance is called as A) Varactor diode B) Switching diode C) Tunnel diode D) Zener-diode  

Answer : A diode in which the change in reverse bias voltage varies the capacitance is called as Varactor diode