MCQ
The unit of power is
- Ajoule
- BJoule per second only
- ✓Joule per second and watt both
- DOnly watt
✓
Answer
Correct option: C.
Joule per second and watt both
(c) Watt $=$ Joule/sec.
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 vessel containing 5 litres of a gas at $0.8 \mathrm{~m}$ pressure is connected to an evacuated vessel of volume 3 litres. The resultant pressure inside will be (assuming whole system to be isolated)
→The distance between the nearest node and antinode in a stationary wave is
Eels are able to generate current with biological cells called electroplaques. The electroplaques in an eel are arranged in 100 rows, each row stretching horizontally along the body of the fish containing 5000 electroplaques. The arrangement is suggestively shown below. Each electroplaques has an emf of $0.15 \mathrm{~V}$ and internal resistance of $0.25 \Omega$
→
The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of $500 \Omega$ the current an eel can produce in water is about
Magnetic intensity for an axial point due to a short bar magnet of magnetic moment $M$ is given by
→The dimensional formula for r.m.s. (root mean square) velocity is
What is the relation between displacement, time and acceleration in case of a body having uniform acceleration
The adjoining diagram shows the spectral energy density distribution $E_\lambda$ of a black body at two different temperatures. If the areas under the curves are in the ratio $16: 1$, the value of temperature $T$ is
→Transverse waves of same frequency are generated in two steel wires $A$ and $B$. The diameter of $A$ is twice of $B$ and the tension in $A$ is half that in $B$. The ratio of velocities of wave in $A$ and $B$ is
→A big ball of mass $M$, moving with velocity $u$ strikes a small ball of mass $m$, which is at rest. Finally small ball obtains velocity $u$ and big ball $v$. Then what is the value of $v$
→Magnetic meridian is a