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Let S^1 and S^2 be the two slits in Young’s double-slit experiment. If central maxima is observed at P and angle ∠S1PS 2 =θ, then the fringe width for the light of wavelength λ will be (assume θ to be a small angle)
15
Nov
Let S^1 and S^2 be the two slits in Young’s double-slit experiment. If central maxima is observed at P and angle ∠S1PS 2 =θ, then the fringe width for the light of wavelength λ will be (assume θ to be a small angle) Let S^1 and S^2 be the two slits in Young's double-slit experiment. [...]
In the standard young’s double -slit experiment with coherent light of wavelength 600 nm, the fringe width of the fringes in the central region
15
Nov
In the standard young’s double -slit experiment with coherent light of wavelength 600 nm, the fringe width of the fringes in the central region In the standard young's double -slit experiment with coherent light of wavelength 600 nm the fringe width of the fringes in the central region November 15, 2020 Category: Cengage JEE Mains [...]
In Young’s double-slit experiment, 30 fringes are obtained in the field of view of the observing telescope, when the wavelength of light used is 4000 A ˚ . If we use monochromatic light of wavelength 6000 A ˚ , the number of fringes obtained in the same field of view is:
15
Nov
In Young’s double-slit experiment, 30 fringes are obtained in the field of view of the observing telescope, when the wavelength of light used is 4000 A ˚ . If we use monochromatic light of wavelength 6000 A ˚ , the number of fringes obtained in the same field of view is: 30 fringes are obtained [...]
Three identical cells , each having an emf1.5V and a constant internal resistance 2.0ω, are connected in series with a 4.0ωresis→rR, first as in circuit (i) , and second as in circuit (ii) . Then ( power in R in circuit (i))/( Power in R in circuit (ii)) =
15
Nov
Three identical cells , each having an emf1.5V and a constant internal resistance 2.0ω, are connected in series with a 4.0ωresis→rR, first as in circuit (i) , and second as in circuit (ii) . Then ( power in R in circuit (i))/( Power in R in circuit (ii)) = and second as in circuit (ii) [...]
The operating temperature of the filament of lamp is 2000∘C. The temperature coefficient of the material of the filament is 0.005∘C−1. If the atmospheric temperature is 0∘C, then the current in the 100 W−200 V lamp when it is switched on is nearest to
15
Nov
The operating temperature of the filament of lamp is 2000∘C. The temperature coefficient of the material of the filament is 0.005∘C−1. If the atmospheric temperature is 0∘C, then the current in the 100 W−200 V lamp when it is switched on is nearest to The operating temperature of the filament of lamp is 2000∘C. The [...]
A servo voltage stabiliser restricts the voltage output to 220V±1%. If an electric bulb rated at 220V,100W is connected to it, what will be the minimum and maximum power consumed by it?
15
Nov
A servo voltage stabiliser restricts the voltage output to 220V±1%. If an electric bulb rated at 220V,100W is connected to it, what will be the minimum and maximum power consumed by it? 100W is connected to it A servo voltage stabiliser restricts the voltage output to 220V±1%. If an electric bulb rated at 220V what [...]
An electric motor is designed to work at 100 V and draws a current of 6 A . The output power supplied by the motor is 150 W, and the remaining of the motor and its percentage efficiency?
15
Nov
An electric motor is designed to work at 100 V and draws a current of 6 A . The output power supplied by the motor is 150 W, and the remaining of the motor and its percentage efficiency? An electric motor is designed to work at 100 V and draws a current of 6 A [...]
The efficiency of a cell when connected to a resistance R is 60 % . what will be its efficiency if the externbal resistance is increased by six times ?
15
Nov
The efficiency of a cell when connected to a resistance R is 60 % . what will be its efficiency if the externbal resistance is increased by six times ? The efficiency of a cell when connected to a resistance R is 60 % . what will be its efficiency if the externbal resistance is [...]
The walls of a closed cubical box of edge 40 cm are made of a material of thickness 1 mm and thermal conductivity 4×10^−4 cal/s∘C−1. The interior of the box is maintained at 100∘C above the outside temperature by a heater placed inside the box and connected across 400 V dc . Calculate the resistance of the heater.
15
Nov
The walls of a closed cubical box of edge 40 cm are made of a material of thickness 1 mm and thermal conductivity 4×10^−4 cal/s∘C−1. The interior of the box is maintained at 100∘C above the outside temperature by a heater placed inside the box and connected across 400 V dc . Calculate the resistance [...]
A motor operating on 120 V draws a current of 2 A. If the heat is developed in the motor at the rate of 9 cal/s, what is its efficiency ?
15
Nov
A motor operating on 120 V draws a current of 2 A. If the heat is developed in the motor at the rate of 9 cal/s, what is its efficiency ? A motor operating on 120 V draws a current of 2 A. If the heat is developed in the motor at the rate of [...]