Correct Answer: B. 13.3

Explanation

M.A = \(\frac{load}{effort} \frac{5000N}{500N} = 10\)

V.R = \(\frac{M.A \times 100}{V} = \frac{10 \times 100}{75} = 13.3\)

Correct Answer: C. 10.6ms^-1

Explanation

n = \(\frac{\sin 45}{\sin 30} = 1.4142\)

n = \(\frac{15m/s}{x}\)

x = \(\frac{15}{1.4142}\) = 10.6m/s

Correct Answer: D. 151

Explanation

P = \(\frac{25}{50} = 0.5\)

V.R = \(\frac{2\pi D}{p} = \frac{2 \times 3.142 \times 12}{0.5}\)

= 151

Correct Answer: A. latent heat

Explanation

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Explanation

(a) The molecule or atoms of a gas must be ionised before the gas can conduct electricity. Ionisation of the gas requires that light the gas pressure is greatly reduced within the enclosure and a high voltage is applied to the enclosed gas.

(b) The electric charge carriers in gases are electrons and ions.

Correct Answer: D. 13.3N

Explanation

E x 3 = 80 x 0.5

E3 = 40

E = \(\frac{40}{3} = 13.3N\)

Explanation

For vertical motion of projectile h = (U sin \(\theta\)) t \(\frac{1}{2}\)gt\(^2\)

= U sin \(\theta\) (\(\frac{Usin \theta}{g}\))\(\frac{1}{2}\)g (\(\frac{Usin \theta}{g}\)) = (\(\frac{U^2 \sin^2 \theta}{g}\))

Correct Answer: D. 1000Nm^-2

Explanation

\(P_2 = \frac{p_1 \times T_2}{T_1} = \frac{500 - 520}{65}\)

= 1000Nm^-2

Correct Answer: C. 1.2A

Explanation

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Correct Answer: B. the frequency of oscillation varies with time

Explanation

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