A resistor and a capacitor are connected in series across an ideal battery havin

Question

A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. At the moment contact is made with the battery the voltage across the resistor is: A) Less than the battery's terminal voltage, but greater than zero B) Zero C) More than battery's terminal voltage, but not infinite D) Equal to the battery's terminal voltage. As more resistors are added in parallel across a constant voltage source, the power supplied by the source A) increases. B) decreases. C) does not change. What is the self-inductance of a solenoid 60.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 times 10^-4 m^2? (= 4 pi times 10^-7 T middot m/A) A) 2.09 nH B) 2.09 H C) 2.09 mH D) 2.09 mu H E) 2.09 pH For the circuit shown in the figure, all quantities are accurate to 3 significant figures. What is the power dissipated in the 2-ohm resistor? A) 8.0 W B) 6.67 W C) 3.56 W D) 5.33 W An 1800-W toaster, a 1.3-kW electric frying pan and a 120-W lamp are plugged 20-A, 120-V circuit. What is the total current drawn all three devices? A) 8 A B) 11 A C) 27 A

Explanation / Answer

22) equals to the battery terminal voltage

Reason-right after the battery is connected there is no charge on the capacitor and since Q=CV

therefore Q=0 => V=0 , but the current is flowing given by V=IR. so voltage across resistance is V same as terminal voltage.

23) increases

Reason Power P=V2 / R

so in parallel ckt there will be less equivalent resistance than in case of series ckt.

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