When a glass capillary tube of radius 0.015 cm is dipped in water, the water rises to height of 15 cm within it. Assuming contact angle between water and glass to be 0°, the surface tension of water is [Pwater 1000 kg m-³, g= water 9.81 ms-¹

Question:

Options :

(a) 0.11 Nm-¹
(b) 0.7 Nm-¹
(c) 0.072 Nm-¹
(d) None of these

Answer :

(a) 0.11 Nm-¹

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An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

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