Podcast
Questions and Answers
For the plane electromagnetic wave given by E = E0 sin(ωt - kx) and B = B0 sin(ωt - kx), what is the ratio of average electric energy density to average magnetic energy density?
For the plane electromagnetic wave given by E = E0 sin(ωt - kx) and B = B0 sin(ωt - kx), what is the ratio of average electric energy density to average magnetic energy density?
- 4
- 1 (correct)
- 3
- 2
Name the logic gate equivalent to the diagram attached.
Name the logic gate equivalent to the diagram attached.
- AND
- OR (correct)
- NAND
- 1/2
A small ball of mass M and density ρ is dropped in a viscous liquid of density ρ0. After some time, the ball falls with a constant velocity. What is the viscous force on the ball?
A small ball of mass M and density ρ is dropped in a viscous liquid of density ρ0. After some time, the ball falls with a constant velocity. What is the viscous force on the ball?
- $F = Mg(1 \pm \rho\rho_0)$
- $F = Mg(1 - \frac{\rho}{\rho_0})$ (correct)
- $F = Mg(1 + \frac{\rho}{\rho_0})$
- $F = Mg(1 + \frac{\rho}{\rho_0})$
The number of air molecules per cm3 increased from $3 \times 10^{19}$ to $12 \times 10^{19}$. What is the ratio of collision frequency of air molecules before and after the increase in number respectively?
The number of air molecules per cm3 increased from $3 \times 10^{19}$ to $12 \times 10^{19}$. What is the ratio of collision frequency of air molecules before and after the increase in number respectively?
A source supplies heat to a system at the rate of 1000 W. If the system performs work at a rate of 200 W, what is the rate at which internal energy of the system increases?
A source supplies heat to a system at the rate of 1000 W. If the system performs work at a rate of 200 W, what is the rate at which internal energy of the system increases?
A particle is moving with constant speed in a circular path. When the particle turns by an angle 90°, what is the ratio of instantaneous velocity to its average velocity?
A particle is moving with constant speed in a circular path. When the particle turns by an angle 90°, what is the ratio of instantaneous velocity to its average velocity?
A small block of mass 100 g is tied to a spring of spring constant 7.5 N/m and length 20 cm. If the block moves in a circular path with constant angular velocity 5 rad/s about a fixed point, what is the tension in the spring?
A small block of mass 100 g is tied to a spring of spring constant 7.5 N/m and length 20 cm. If the block moves in a circular path with constant angular velocity 5 rad/s about a fixed point, what is the tension in the spring?
A monochromatic light wave with wavelength λ1 and frequency v1 in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then what are the wavelength λ2 and frequency v2 of the refracted wave?
A monochromatic light wave with wavelength λ1 and frequency v1 in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then what are the wavelength λ2 and frequency v2 of the refracted wave?
