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Questions and Answers
What is the ratio of heat developed in three wires with lengths in the ratio 1 : 5 : 8 and radii in the ratio 1 : 2 : 3 in parallel combination?
What is the ratio of heat developed in three wires with lengths in the ratio 1 : 5 : 8 and radii in the ratio 1 : 2 : 3 in parallel combination?
- 40 : 32 : 45
- 1 : 25 : 64 (correct)
- 1 : 4 : 9
- 45 : 32 : 40
In the scenario described, what is the tension in the rope at 2 m from the end where the force is applied?
In the scenario described, what is the tension in the rope at 2 m from the end where the force is applied?
- 8 N
- 4 N
- Zero (correct)
- 6 N
When a car of mass (m) accelerates, starting from rest, while the engine supplies constant power P, how does the velocity vary with time (t)?
When a car of mass (m) accelerates, starting from rest, while the engine supplies constant power P, how does the velocity vary with time (t)?
- v t1/2
- v t2
- v t3/2 (correct)
- v t
What is the energy gap of a photodetector used to detect the wavelength of 1700 nm?
What is the energy gap of a photodetector used to detect the wavelength of 1700 nm?
If the position (x) of a particle varies with time as t = x2 + x, what is the acceleration of the particle?
If the position (x) of a particle varies with time as t = x2 + x, what is the acceleration of the particle?
What are the dimensions of the constant α in the equation A = A0 e^(-αt)?
What are the dimensions of the constant α in the equation A = A0 e^(-αt)?
If a block takes thrice as much time to slide down a 45° rough inclined plane as it takes to slide down a similar smooth plane, then what is the coefficient of friction?
If a block takes thrice as much time to slide down a 45° rough inclined plane as it takes to slide down a similar smooth plane, then what is the coefficient of friction?
If a 2 kg body moves such that its position x as a function of time t is given by $x = t^4 + 3$, then what is the work done by the force in the first two seconds?
If a 2 kg body moves such that its position x as a function of time t is given by $x = t^4 + 3$, then what is the work done by the force in the first two seconds?
What is the semi-vertex of the conical pendulum through which a body can perform uniform circular motion, if the string supports 2/3 times its weight?
What is the semi-vertex of the conical pendulum through which a body can perform uniform circular motion, if the string supports 2/3 times its weight?
If a + b = c, then what is the angle between vector 'a' and vector 'b'?
If a + b = c, then what is the angle between vector 'a' and vector 'b'?
A body floats in water with one-third of its volume above the surface. If it is placed in oil, it floats with half of its volume above the oil surface. What is the specific gravity of the oil?
A body floats in water with one-third of its volume above the surface. If it is placed in oil, it floats with half of its volume above the oil surface. What is the specific gravity of the oil?
What is the relationship between the speed of a wave pulse and the distance from its free end in a hanging string?
What is the relationship between the speed of a wave pulse and the distance from its free end in a hanging string?
What is the time period of oscillation of total energy of a harmonic oscillator having angular frequency (ω)?
What is the time period of oscillation of total energy of a harmonic oscillator having angular frequency (ω)?
If the current through an inductor is given by i = t sin t, then what is the voltage across the 2 H inductor?
If the current through an inductor is given by i = t sin t, then what is the voltage across the 2 H inductor?
At what distance from the center of a spherical shell of mass M and radius R, does a point mass 2M experience gravitational potential equal to $\frac{7GM}{R}$?
At what distance from the center of a spherical shell of mass M and radius R, does a point mass 2M experience gravitational potential equal to $\frac{7GM}{R}$?
If a body has equal amount of rotational kinetic energy and translational kinetic energy while rolling without slipping on a horizontal surface, then what type of body is it?
If a body has equal amount of rotational kinetic energy and translational kinetic energy while rolling without slipping on a horizontal surface, then what type of body is it?
