KCET · Physics · Work Power Energy
A ceiling fan is rotating around a fixed axle as shown. The direction of angular velocity is along \(\qquad\)

- A \(+\hat{\mathbf{j}}\)
- B \(-\hat{\jmath}\)
- C \(+\hat{\mathbf{k}}\)
- D \(-\hat{\mathbf{k}}\)
Answer & Solution
Correct Answer
(D) \(-\hat{\mathbf{k}}\)
Step-by-step Solution
Detailed explanation
According to right hand rule, direction of angular velocity is along \(Z\)-axis.
i.e., Along \(-\hat{\mathbf{k}}\)
i.e., Along \(-\hat{\mathbf{k}}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The minimum value of effective capacitance that can be obtained by combining \( 3 \) capacitors of capacitances \( 1 \mathrm{pF}, 2 \mathrm{pF} \) and \( 4 \mathrm{pF} \) isKCET 2017 Hard
- The equation of a simple harmonic wave is given by \(y=6 \sin 2 \pi(2 t-0.1 x)\), where and are in \(\mathrm{mm}\) and is in seconds. The phase difference between two particles \(2 \mathrm{~mm}\) apart at any instant isKCET 2008 Medium
- The number of photons falling per second on a completely darkened plate to produce a force
of \( 6.62 \times 10^{-5} \mathrm{~N} \) is ' \( n \) '. If the wavelength of the light falling is \( 5 \times 10^{-7} \mathrm{~m} \), then \( n= \)
\( \times 10^{22} \).
\( \left(h=6.62 \times 10^{-34}\right) \mathrm{J}_{\mathrm{S}} \)KCET 2018 Medium - \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times 10^{14} \mathrm{~Hz}\) and \(2.2 \times 10^{14} \mathrm{~Hz}\). Two identical photons of energy \(0.825 \mathrm{eV}\) each are incident on them. Then photoelectrons are emitted by (Take \(h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) )KCET 2007 Medium
- Magnetic field at the centre of a circular coil of radius \(R\) due to \(i\) flowing through it is \(B\). The magnetic field at a point along the axis at distance \(R\) from the centre isKCET 2010 Easy
- In an oscillating \(L C\)-circuit, \(L=3 \mathrm{mH}\) and \(C=2.7 \mu \mathrm{F}\). At \(t=0\), the charge on the capacitor is zero and the current is \(2 \mathrm{~A}\). The maximum charge that will appear on the capacitor will beKCET 2021 Medium
More PYQs from KCET
- For the following gaseous reversible reaction:
\(3\text{A}_{(g)} + \text{B}_{(g)} \rightleftharpoons \text{A}_3\text{B}_{(g)} \quad (\Delta_r H = -q\text{ kJ})\). The amount of product \(\text{A}_3\text{B}_{(g)}\) is affected by ____KCET 2026 Easy - A metal rod of length \(10 \mathrm{~cm}\) and a rectangular cross-section of \(1 \mathrm{~cm} \times \frac{1}{2} \mathrm{~cm}\) is connected to a battery across opposite faces. The resistance will beKCET 2020 Hard
- At \(27^{\circ} \mathrm{C}\) temperature, the mean kinetic energy of the atoms of an ideal gas is \(\mathrm{E}_1\). If the temperature is increased to \(327^{\circ} \mathrm{C}\), then the mean kinetic energy of the atoms will beKCET 2025 Easy
- The following graph represents the variation of photocurrent with anode potential for a metal surface. Here \(I_{1}, I_{2}\) and \(I_{3}\) represents intensities and \(\gamma_{1}, \gamma_{2}, \gamma_{3}\) represent frequency for curves 1,2 and 3 respectively, then
KCET 2020 Easy - A particle starts form rest and its angular displacement (in radians) is given by \(\theta=\frac{t^{2}}{20}+\frac{t}{5}\). If the angular velocity at the end of \(t=4\) is \(k\), then the value of \(5 k\) isKCET 2021 Easy
- The set \(\{-1,0,1\}\) is not a multiplicative group because of the failure ofKCET 2008 Easy