MCQ
An alternating voltage is represented as $E=20 \sin 300 t$. The average value of voltage over one cycle will be
- ✓$0$
- B$10$ volt
- C$20 \sqrt{2}$ volt
- D$\frac{20}{\sqrt{2}}$ volt
✓
Answer
Correct option: A.
$0$
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
Three rods made of the same material and having the same cross section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at $0^{\circ} \mathrm{C}$ and $90^{\circ} \mathrm{C}$ respectively. The temperature of the junction of the three rods will be
→A compound microscope has an eye piece of focal length $10 \mathrm{~cm}$ and an objective of focal length $4 \mathrm{~cm}$. Calculate the magnification, if an object is kept at a distance of $5 \mathrm{~cm}$ from the objective so that final image is formed at the least distance vision $(20 \mathrm{~cm})$
→In the figure a carbon resistor has bands of different colours on its body as mentioned in the figure. The value of the resistance is
With what velocity an observer should move relative to a stationary source so that he hears a sound of double the frequency of source
A block of mass $1 \mathrm{~kg}$ slides down on a rough inclined plane of inclination $60^{\circ}$ starting from its top. If the coefficient of kinetic friction is 0.5 and length of the plane is $1 \mathrm{~m}$, then work done against friction is (Take $g=9.8$ $\left.\mathrm{m} / \mathrm{s}^2\right)$
→Electromotive force is the force, which is able to maintain a constant
Following figure shows on adiabatic cylindrical container of volume $V_0$ divided by an adiabatic smooth piston (area of cross-section = \$ in two equal parts. An ideal gas $\left(C_P / C_V=\gamma\right)$ is at pressure $P$ and temperature $T$ in left part and gas at pressure $P$ and temperature $T$ in right part. The piston is slowly displaced and released at a position where it can stay in equilibrium. The final pressure of the two parts will be (Suppose $x=$ displacement of the piston)
→If the displacement of a particle executing $SHM$ is given by $y=0.30 \sin (220 t+0.64)$ in metre, then the frequency and maximum velocity of the particle is
→A soap bubble in vacuum has a radius of $3 \mathrm{~cm}$ and another soap bubble in vacuum has a radius of $4 \mathrm{~cm}$. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is
→In the following figure, four curves $A, B, C$ and $D$ are shown. The curves are
→