MCQ
In which coordinate system do we use distance from origin and to angles to define the position of a point in space?
- ACartesian
- BCylindrical
- CSpherical
- D2 - D Cartesian
✓
Answer
- Spherical
Explanation:
In Spherical system, distance from the center, the angle with the X axis, and the angle with the Z axis are used to define the position of a point. These are respectively represented by R, $\theta$ and $\phi.$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A curved in a level road has a radius $75\, m$. The maximum speed of a car turning this curved road can be $30 \,m / s$ without skidding. If radius of curved road is changed to $48\, m$ and the coefficient of friction between the tyres and the road remains same, then maximum allowed speed would be .........$m / s$.
→A body is moving in a room with a velocity of $20\, m / s$ perpendicular to the two walls separated by $5$ meters. There is no friction and the collisions with the walls are elastic. The motion of the body is
→The amplitude of a damped oscillator decreases to $0.9$ times its original magnitude in $5\ s$. In another $10\ s$ it will decrease to $\alpha $ times its original magnitude, where $\alpha $ equals
→The acceleration of moon with respect to earth is 0⋅0027ms-2 and the acceleration of an apple falling on earth's surface is about 10ms-2. Assume that the radius of the moon is one fourth of the earth's radius. If the moon is stopped for an instant and then released, it will fall towards the earth. The initial acceleration of the moon towards the earth will be:
- 10ms-2
- 0.0027ms-2
- 6.4ms-2
- 5.0ms-2
A mass $M$ is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes simple harmonic oscillations with a time period $T$. If the mass is increased by m then the time period becomes $\left( {\frac{5}{4}T} \right)$. The ratio of $\frac{m}{{M}}$ is
→When a ceiling fan is switched off, its angular velocity falls to half while it makes $36$ $rotations.$ How many more rotations will it make before coming to rest (Assume uniform angular retardation)
→The power of a sound from the speaker of a radio is $20 mW$. By turning the knob of the volume control, the power of the sound is increased to $400 mW.$ The power increase in decibels as compared to the original power is .... $dB$
→When forces ${F_1},\,{F_2},\,{F_3}$ are acting on a particle of mass m such that ${F_2}$ and ${F_3}$ are mutually perpendicular, then the particle remains stationary. If the force ${F_1}$ is now removed then the acceleration of the particle is
→A homogeneous solid cylinder of length $L$$(L < H/2)$. Cross-sectional area $A/5$ is immersed such that it floats with its axis vertical at the liquid-liquid interface with length $L/4$ in the denser liquid as shown in the fig. The lower density liquid is open to atmosphere having pressure ${P_0}$. Then density $D$ of solid is given by
→A body weighs $700 \,gm$ wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is $\frac{1}{7}$ and radius is half that of the earth ........ $gm\, wt$
→