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The basic function of microscope is magnification

Shortsightedness is corrected using a concave (curved inwards) lens which is placed in front of a myopic eye

Electrical work W = QE, Where Q is the quantity of change and E is the electromotive force. ∴ E = W = FxDQ_It Where D is the displacement,I = current and t = time But dimension of force, = unit of mass x unit of Acceleration = unit of mass xunit of velocityunit of time = unit of mass x unit of displacement__unit of time x unit of time ML/T2 = MLT-2 ∴ Dimension of emf E = MLT-2L = ML2T-3I-1__IT

∴i,ii, iii and iv have correct units.

Altitude is just a measure of height, regardless of direction.

From V\(^2\) = U\(^2\) + 2as O = U\(^2\) - 2gH, since at maximum height H, the final velocity, v = O. when K.E = P.E ∴ H = \(\frac{(U)^2}{2g}\) Halfway is the \(\frac{\text{height}}{2}\) PE = KE at \(\frac{(1)}{2}\) H = \(\frac{(U)^2}{2g}\) x (\(\frac{1}{2}\)) = \(\frac{U^2}{4g}\)

F = \(\frac{mv^2}{\text{r}}\) = \(\frac{100 \times 5^2}{10}\) = 250N R = mg = 100 x 10 = 1000N coefficient of friction, µ = \(\frac{\text{F}}{\text{R}}\) = \(\frac{(250)}{1000}\) = 0.25.

hlpl = hwpw where, L =liquid and W = water (pl)/pw = (hw)/hl = (26.5)/20.4 = 1.299

relative density = (weight of substance )/weight of equal volume of water = (4 - 2)/5 - 2 = (2)/3

Comparing y = 5sin (200 \pit - 0.4X) with the wave equation y = A sin (wt -KX) K = (2\pi)/\lambda = 0.4 ∴ \lambda = (2\pi)/0.4 = 15.7M

A d.c. generator uses a split ring (commutator) to convert alternating current (a.c.) to direct current (d.c.), while an a.c. generator uses slip rings.

The resistors are in series ∴ Reff = R1 + R2 + ..... = 4 + 4 + 4 + 4 + 4 + 4 = 24 Ω

for the conversion of mass 14 + 4 = 17 + x ∴ X = 18 - 17 = 1 for conservation pf charge:7 + 2 = 8 + y y = 9 - 8 = 1 Thus, the element is 11X which is equal to hydrogen nucleus ( proton)

Particles of the transmitting medium in transverse wave oscillate in a direction perpendicular to the propagation of the wave Particle motion of a string (transverse wave) is parallel to OY (or perpendicular to OX)

When air in a rigid box is heated, the molecules move faster, causing more forceful collisions with the walls and hence increasing the pressure. Since the box cannot expand, the average separation remains unchanged.