MCQ
A tachometer is a device to measure
- ASpeed of rotation
- ✓Gravitational pull
- CSurface tension
- DTension in a spring
✓
Answer
Correct option: B.
Gravitational pull
b
A tachometer is an instrument designed to measure the rotation speed of a shaft or disk. Tachometers generally measure rotations per minute $(RPM)$ though some models also serve as rate meters and/or totalizers.
A tachometer is an instrument designed to measure the rotation speed of a shaft or disk. Tachometers generally measure rotations per minute $(RPM)$ though some models also serve as rate meters and/or totalizers.
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
$Assertion :$ The ratio of $\frac{C_p}{C_v}$ for an ideal diatomic gas is less than that for an ideal monoatomic gas (where $C_p$ and $C_v$ have usual meaning).
$Reason :$ The atoms of a monoatomic gas have less degrees of freedom as compared to molecules of the diatomic gas.
→$Reason :$ The atoms of a monoatomic gas have less degrees of freedom as compared to molecules of the diatomic gas.
A body weights $49\,N$ on a spring balance at the north pole. ..... $N$ will be its weight recorded on the same weighing machine, if it is shifted to the equator?
→(Use $g=\frac{G M}{R^{2}}=9.8 \,ms ^{-2}$ and radius of earth, $R =6400\, km .]$
The radius of a circle is $2.12$ metre. Its area according to the rule of significant figures is ......... $m ^2$
→Which one of the following is the Young’s modulus $($in $N/m^2)$ for the wire having the stress-strain curve shown in the figure
→In order to double the frequency of the fundamental note emitted by a stretched string, the length is reduced to $\frac{3}{4}$$^{th}$ of the original length and the tension is changed. The factor by which the tension is to be changed, is
→The distance between two particles is decreasing at the rate of $6 \,m/sec$. If these particles travel with same speeds and in the same direction, then the separation increase at the rate of $4 \,m/sec$. The particles have speeds as
→Two blocks $A$ and $B$ of masses $6\, kg$ and $3\, kg$ rest on a smooth horizontal surface as shown in the figure. If coefficient of friction between $A$ and $B$ is $0.4$, the maximum horizontal force which can make them without separation is ........ $N$
→The kinetic energy of a body of mass $3 \,kg$ and momentum $2 \,N-s$ is
→In making an alloy, a substance of specific gravity ${s_1}$ and mass ${m_1}$ is mixed with another substance of specific gravity ${s_2}$ and mass ${m_2}$; then the specific gravity of the alloy is
→A tunnel is dug along the diameter of earth of mass $'M'$ and then a mass $'m'$ is released a distance $'X'$ from centre so that the time period of oscillation is $T$ . If mass $'4m'$ is released from same point then time period of oscillation will be
→