Q1. A 230 V voltmeter draws 1.4 mA current for full scale deflection. This voltmeter is used to measure the voltages individually across each of a 50 kΩ resistor and a 30 kΩ resistor, both connected in series across a 120 V source. What is the sum of the voltmeter readings?
Q1. A 230 V voltmeter draws 1.4 mA current for full scale deflection. This voltmeter is used to measure the voltages individually across each of a 50 kΩ resistor and a 30 kΩ resistor, both connected in series across a 120 V source. What is the sum of the voltmeter readings?
Q2. Two batteries A and B connected in parallel supply a load of 3.5 Ω. The open circuit emf of battery A is 12.9 V and that of B is 13.1 V. Their internal resistances are 0.04 Ω and 0.043 Ω respectively. Determine the magnitude and direction of current in each battery and the total power supplied to the load.
Q3. The following loads are across a 220 V supply. Find the energy bill @ Rs. 11/unit. (i) 10 lamps of 230 V, 100 W, for 7 h; (ii) 4 fans of 240 V, 60 W, for 5 h; and (iii) 1 heater of 1200 W, 225 V, for 3 h. Q8. When a certain battery is loaded by a 50 Ω resistor, its terminal voltage is 88.4 V. When it is loaded by an 80 Ω resistor, its terminal voltage is 88.9 V. What load resistance would give a terminal voltage of 80 V?
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