Physics
A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were helved and the temperature doubled, the power radiated in watt would be
22
Aug
A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were helved and the temperature doubled, the power radiated in watt would be A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were helved [...]
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be :
22
Aug
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be : Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The [...]
The mean free path of electrons in a metal is 4×10^−8m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units of Vm^-1
22
Aug
The mean free path of electrons in a metal is 4×10^−8m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units of Vm^-1 The mean free path of electrons in a metal is 4×10^−8m. The electric field which can give on an average [...]
Power dissipated across the 8Ω resistor in the circuit shown here is 2W. The power dissipated in watt units across the 3Ω resistor is
22
Aug
Power dissipated across the 8Ω resistor in the circuit shown here is 2W. The power dissipated in watt units across the 3Ω resistor is Power dissipated across the 8Ω resistor in the circuit shown here is 2W. The power dissipated in watt units across the 3Ω resistor is August 22, 2020 Category: Chapter 22 - [...]
The total power dissipated in watts in the circuit shown here is
22
Aug
The total power dissipated in watts in the circuit shown here is The total power dissipated in watts in the circuit shown here is August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
A current of 3 A flows through the 2 ohm resistor shown in the circuit. The power dissipated in the 5 ohm resistor is:
22
Aug
A current of 3 A flows through the 2 ohm resistor shown in the circuit. The power dissipated in the 5 ohm resistor is: A current of 3 A flows through the 2 ohm resistor shown in the circuit. The power dissipated in the 5 ohm resistor is August 22, 2020 Category: Chapter 22 - [...]
An electric kettle takes 4A current at 220V. How much time will it take to boil 1 kg of water from temperature 20 degree C?
22
Aug
An electric kettle takes 4A current at 220V. How much time will it take to boil 1 kg of water from temperature 20 degree C? An electric kettle takes 4A current at 220V. How much time will it take to boil 1 kg of water from temperature 20 degree C? August 22, 2020 Category: Chapter [...]
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:
22
Aug
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves: A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved 1988 - 2019 Physics [...]
If voltage across a bulb rated 220 Volts,100 Watt drops by 2.5% of its rated value the percentage of the rated value by which the power would decrease is :
22
Aug
If voltage across a bulb rated 220 Volts,100 Watt drops by 2.5% of its rated value the percentage of the rated value by which the power would decrease is : 100 Watt drops by 2.5% of its rated value the percentage of the rated value by which the power would decrease is If voltage across [...]
Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5Ω. The power loss in the wire is
22
Aug
Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5Ω. The power loss in the wire is are connected as shown.The voltmeter V will record a reading of one [...]