Options:
- A. Joule effect
- B. Joule Thomsons effect
- C. Comptons effect
- D. Feed back effect
View Answer
A. Joule effect
Physics
When same current passes for same time through a thick and thin wire_________________?
Options:
- A. more heat is produced in thick wire
- B. more heat is produced in thin wire
- C. no heat is produced in wire
- D. less heat is produced in thick wire
View Answer
B. more heat is produced in thin wire
Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?
Options:
- A. 40 W
- B. 90W
- C. 100W
- D. 120W
View Answer
B. 90W
One kilowatt hour is the amount of energy delivered during _______________?
Options:
- A. one second
- B. one day
- C. one minute
- D. one hour
View Answer
D. one hour
Thermocouples convert___________________?
Options:
- A. heat energy into electrical energy
- B. heat energy into light energy
- C. heat energy into mechanical energy
- D. mechanical energy into heat energy
View Answer
A. heat energy into electrical energy
How much heat does a 40 W bulb generates in one hour ?
Options:
- A. 144000J
- B. 144J
- C. 1.44J
- D. 14J
View Answer
A. 144000J
An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?
Options:
- A. 2KWh
- B. 20KWh
- C. 6KWh
- D. 12KWh
View Answer
A. 2KWh
Resistance of a super conductor is ______________________?
Options:
- A. finite
- B. infinite
- C. zero
- D. changes with every conductor
View Answer
C. zero
Resistance of an ideal insulator is __________________?
Options:
- A. infinite
- B. zero
- C. finite
- D. depends upon nature
View Answer
A. infinite
Which one is the best material for making connecting wires ?
Options:
- A. iron
- B. tungsten
- C. silver
- D. copper
View Answer
D. copper