मैट्रिक स्पेशल |60 मिनट 60 प्रश्न|V.V.I OBJECTIVE Q UESTIONS|अब 90%कंफर्म

Find the resistance of 60 W, 240 V bulb.

In the circuit, the battery is ideal. A voltmeter of inifinite resistance is connected in turn across R_1 and R_2 , giving reading of V_1 and V_2 respectively. . (i) V_1 = 80 V (ii) V_1 = 60 V (iii) V_2 = 30 V (iv) V_2 = 40 V .

Two bulbs are rated 30 W - 200 V and 60 W - 200 V . They are connected with a 400 V power supply. Find which bulb will get fused if they are connected in (i) series and (ii) parallel.

An electric lamp is marked 60 W, 240 V. If it operats at 200, V the current through it will be

A transformer converts 240 V AC to 60 V AC. The secondary has 75 turns. The number of turns in the primary are

A lamp is marked 60 W, 220 V. If it operates at 200 V, the rate of consumption of energy will

In India electricity is supplied for domestic use at 220 V . It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R , the resistance of a 60 W bulb for use in USA will be