Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. `e_(A)` and `e_(B)`. Their surface tempratures are `T_(A)` an `T_(B)`. The ratio `T_(A)//T_(B)` will be equal toA. `((e_(B))/(e_(A)))^(1//4)`B. `((e_(B))/(e_(A)))^(1//2)`C. `((e_(A))/(e_(B)))^(1//2)`D. `((e_(A))/(e_(B)))^(1//4)`

Two electric lamps A and B radiate the same power. Their filaments hav

1.	Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. `e_(A)` and `e_(B)`. Their surface tempratures are `T_(A)` an `T_(B)`. The ratio `T_(A)//T_(B)` will be equal toA. `((e_(B))/(e_(A)))^(1//4)`B. `((e_(B))/(e_(A)))^(1//2)`C. `((e_(A))/(e_(B)))^(1//2)`D. `((e_(A))/(e_(B)))^(1//4)`
Answer» Correct Answer - A

Discussion

No Comment Found

Related InterviewSolutions

Two circular loops A and B of radii R and 2R respectively are made of the similar wire. Their moments of inertia about the axis passing through the centre of perpendicular to their plane are `I_(A)" and "I_(B)` respectively. The ratio`(I_(A))/(I_(B))` is :A. `(1)/(4)`B. `(1)/(8)`C. `(1)/(2)`D. 1
The radius of gyration (K) of a rigid body changes with change of :-A. Angular speedB. Axis of rotationC. Both (1) and (2)D. Never changes
Four spheres of diameter 2a and mass M are placed with their centres on the four corners of a square of side b. Then moment of inertia of the system about an axis about one of the sides of the square is :-A. `Ma^(2)+2Mb^(2)`B. `Ma^(2)`C. `Ma^(2)+4Mb^(2)`D. `(8)/(5)Ma^(2)+2Mb^(2)`
Three rods each of mass m and length l are joined together to form an equilateral triangle as shown in figure. Find the moment of inertial of the system about an axis passig through its centre of mass and perpendicular to the plane of the particle.A. `2mL^(2)`B. `(mL^(2))/(2)`C. `(mL^(2))/(3)`D. `(mL^(2))/(6)`
Two solid spheres of different mass, radii and denisty roll down a rough inclined plane under indentical situation. Their time to come down is independent o their :-A. MassB. RadiusC. DensityD. All of these
Two particles of equal mass (m) each move in a circle of radius (r) under the action of their mutual gravitational attraction find the speed of each particle.A. `(1)/(2R)sqrt((1)/(Gm)`B. `sqrt((Gm)/(2R))`C. `(1)/(2)sqrt((Gm)/(R))`D. `sqrt((4Gm)/(R))`
Two dises having masses in the ratio `1 : 2` and radii in the ratio `1 : 8` roll down without slipping one by one from an inclined plane of height h. The ratio of their linear velocities on reaching the ground is :-A. `1 : 16`B. `1 : 128`C. `1 : 8sqrt(2)`D. `1 : 1`
An inclined plane makes an angle 30° with the horizontal. A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal toA. `(g)/(3)`B. `(2g)/(3)`C. `(5g)/(7)`D. `(5g)/(14)`
The position (x) of body moving along x-axis at time (t) is given by `x=3f^(2)` where x is in matre and t is in second. If mass of body is 2 kg, then find the instantaneous power delivered to body by force acting on it at `t=4` s.A. 288 WB. 280 WC. 290 WD. None
When a point mass slips down a smooth incline from top, it reaches the bottom with linear speed v. If same mass in the form of disc rolls down without slipping a rough incline of identical geometry through same distance, what will be its linear velocity at the bottom ?A. `vsqrt((2)/(3))`B. `sqrt((v)/(3))`C. vD. `sqrt((2v)/(3))`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment