I am confused on what steps to take and how to solve this problem.  how much energy does a 56 ohm light use in 8.1 minutes when hooked up to a 120 V outlet?

Show that maximum power generated in y when R = 3 ohm . Given that maximum power is calculated when y=5 ohm   The link of  circuit is in the topic http://i.imgur.com/DVwtE8p...

specifically on a breadboard, so no soldering involved in this question at all.

An LR circuit having time constant of 50 ms is connected with an ideal battery of emf E . prove that the time elapsed before the power dissipated in heat reaches half its maximum value is 61ms

A resistor is placed in a circuit. The current in the circuit is 2 amperes and the voltage drop across the resistor is 8 volts. The voltage is then increased to 12 volts. What will be the new current...

In the given circuit the ammeter A1 and A2 are ideal and ammeter A3 has a resistance 1.9 x 10-3 . Then show that reading from ammeter are 82/27 , 34/27 & 0 respectively .    The...

In the given circuit , all the capacitor are initially uncharged . After closing the switch S1 for a long time suddenly S2 is also closed for a long time . Then show that total heat produced after...

A cell of emf E having an internal resistance r is connected to an external resistance R . The potential difference V across the resistance R varies with R as shown in figure by which curve   http://i...

A 3 mega ohm resistor and an uncharged 10^(-6) F capacitor are connected in a single loop circuit with a constant source of 4 volt . Show that at one second after the connection is made , the rate...

How would a parallel cicuit impact four identical light bulbs that are placed in parallel?   Short but brief paragraph explaining why please.

How would a parallel circuit impact the circuit of three light bulbs had the battery replaced with a three-volt battery?   Please explain what would happen.

How would a parallel circuit impact a circuit of three new light bulbs had a larger current with the original one-volt battery?   Please explain what would happen.